The B48 is without any serious common problems to date. Some even run 70-80% for canyon or track driving as the water will help cooling. The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. Regardless, in this post we will lay it out as clearly as possible. These cookies will be stored in your browser only with your consent. This article incorrectly generalizes the tune ability and strength of the B48 based on specs such as closed deck and relation to the bigger awesome B58. I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Within the modular B series of engines, it does fall short of the B58 which seems to be the most reliable engine in the family. https://www.mgflasher.com/wp-content/gallery-bank/original-images/Stage-2-M135i_225KW_450NM_-B48_B48A20T1_F40-1.png, https://static.nhtsa.gov/odi/tsbs/2022/MC-10212788-9999.pdf. This website uses cookies to improve your experience while you navigate through the website. Dmitry has been an editor and author at Cararac.com since 2015. What do you think of the ER charge pipe? No, completely different design. Great read. However, we think a 10,000 mile OCI is too long for longevity. BMW N20 Engine Reliability, Known Issues, and More. However, its really too new to tell what may pop up down the road. Based on the B58. ~325-350wtq. Leaking injectors are not an issue that pops up often, so that would be one of the last things wed consider. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. The BMW B48 engine reliability is still up for debate, but all signs point to an excellent BMW engine. BMW is long known for their ability to build beautiful inline 6 engines. N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications. If youre over 100,000 miles on your B48-powered BMW, a walnut blast is recommended. Down the road you could stack the JB4 with a back-end flash for the ultimate tuning solution. Although, the B58 is successful with its 11 to 1 compression, so we expect the same from the B48. BMW reliability seems to be trending in the right direction, though. A different exhaust manifold uses six ports instead of six into two and revised pistons change the compression ratio from 11:1 to 10.2:1. T. TheNine90 192 Replies. Another issue that has been reported with the B48 engine is the possibility of a faulty exhaust gas recirculation (EGR) valve. The internals and design are plenty strong to surpass 200,000 miles. your BM3 estimated gain chart is incorrect, that is for the 35i B48 model that is already currently upgraded (tuned) to 302 hp. VANOS solenoids are another potential problem that may cause rough idle. JavaScript is disabled. This issue is caused by an incorrectly assembled asbestos-free gasket. We recommend switching to these spark plugs if youre pushing the limit of the B48 turbo or upgrade the turbo. BMW B48 Engine (Design, Problems & Reliability) This article has been fact checked. Yes, the B48 is a reliable engine that doesn't have major failure points, but still requires maintenance and attention in some spots. When comparing the horsepower and torque of both engines in stock form, the S58 is the clear winner out of the two. The great news is the B48 is off to an excellent start from a reliability perspective. As such, the limits of the B48 might fall in the same ballpark. Is the B48 reliable? That said, were likely writing this article too soon. This cookie is set by GDPR Cookie Consent plugin. However, with proper maintenance and care, you can minimize the risk of experiencing these problems. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. https://static.nhtsa.gov/odi/tsbs/2022/MC-10212788-9999.pdf, Your email address will not be published. The limits of the B48 are still rather unknown. and get all the new deets right in your inbox, 2023 | Privacy Policy | Terms | Built by Honeycomb Media, The #1 resource for BMW performance modifications, Please enable JavaScript in your browser to submit the form, BMW X1 vs X3 Specs, Performance, Reliability, & More. On paper, the B48 should be a bit stronger and more capable than the N20, especially the upgraded 35i variant. Though, these issues usually dont pop up until 80,000 100,000+ miles. The reliability rating on a BMW 3 series is pretty average, but it does increase as you step up in the model range. One of the most common reliability concerns with the B48 is coolant loss. Personally, I think B48 is better than N20. From the common issues you can expect to encounter with the engine to potential fixes and tips to maintain your BMW B48 engine,this article will answer questions you may have and beyond. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. Its like comparing an infiniti q60 non-redsport to a Q60 redsport variantthe non redsport (cheaper model with 100 less hp) will gain over 100 whp from a tune alone, where the redsport gains 30-50 whp at best. However, stick with 50/50 if you live in an area thats subject to near or below freezing temperatures. Pressure test the cooling system to attempt to find the leak. A related problem here is a defective turbocharger. Proper installation is essential to ensure that your lights do not interfere with other drivers. Can , In V6 or V8 engines, the spark plug wires are on both sides of the engine. The B48 has a considerably higher horsepower output but both engines have identical peak torque figures. Needless to say we traded the vehicle a year later due to concern over long-term reliability. The recall is US only at the moment. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. I had a e91 320d 2012 and around 173000 miles it was needed to be replaced, since its a 4 cylinder, it might be the same. Tune only cars are able to push over 260 wheel horsepower and 290 wheel torque. B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp The B47 has proven to be reliable so far in my mothers 320d. Most B48 models are limited to around 130mph or 155mph. I have done so far 36000 miles in my 320i b48 and it has been faultless. B48 feels more refined, but when I put the pedal to the metal, it took a little longer for turbo to spool up and the car to actually go compared to my N20. These engines perform great and have very good fuel economy. *Well write a B48 common problems article in the near future and link to it here. For most, it probably makes sense to upgrade to the turbo inline 6 engines if youre looking for 330+whp. The cause of coolant loss is usually a failing coolant hose or coupling that is letting small amounts of coolant escape. The engine is being included in the also new bmw x1. The most important aspect is sticking with a quality, trusted tune. Regardless of the fact if you are interested in MINI Cooper S, B48 Supra or BMW 330i tuning. 82.0 mm bore x 94.6mm stroke (3.23 x 3.72). However, we believe it is a step in the right direction. Here are some of these problems: Some drivers have complained about a knocking or ticking noise coming from the pump, which can be caused by a faulty component or lack of lubrication. B48 reliability and efficiency N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > B48 reliability and efficiency Search this Thread Post Reply Page 1 of 3 1 2 3 > Bookmarks twitter Facebook Digg Google StumbleUpon del.icio.us My Yahoo! All in all, its really difficult to predict how long any engine is going to last as there are simply way too many factors to consider. BMW's B48 engine is also the successor to the 2.0L turbo N20 engine. For a better experience, please enable JavaScript in your browser before proceeding. Analytical cookies are used to understand how visitors interact with the website. Submit! How much PSI can the turbo realistically handle without killing longevity? My n20 120i 2016 is w that same noise Is that normal? Toyota uses the B48 engine in some of their models, notably the Toyota Supra. Point is standard maintenance isnt the cheapest. It's always a good idea to get a quote from a trusted mechanic before proceeding with any repairs, as this will give you an idea of what to expect in terms of cost. I will dyno it before mapping as it feels more like 200 bhp but I've been quoted 260 on the remap. You could do a full big turbo stock block b58 build in a day on stands with a floor jack. We review the N55's performance and reliability. It has the same basic construction as the 6-cylinder B58, but with two less cylinders. Engine limits are always a tough topic. The base 3 series for the 2021 model year is the 330i sedan and it has a 2.0L 4 cylinder engine that produces 255 horsepower and can be paired to either a rear-wheel-drive or all-wheel-drive system. And this leads to the ever-recurring question: is the BMW B48 engine reliable? . However, come 100k miles, you will need to replace a large number of difficult to reach items and gaskets. https://static.nhtsa.gov/odi/tsbs/2012788-9999.pdf I need to get a walnut blast, ignition coil and spark plug changed. Thats it. However, keep in mind that attempting to repair your engine on your own can be risky and could potentially result in further damage if not done correctly. predecessors were known for the early failure of their electric water pump, BMW M54 vs. N52 Comparison: Horsepower, Reliability, Tuning, & Sound, BMW B58 vs. S58: Performance, Tuning, Reliability & Sound, BMW S65 vs. S85: Performance, Tuning, Reliability & Sound, BMW S55 vs. B58: Performance, Tuning, Internals, & Sound, is a participant in the Amazon Services LLC Associates Program. However, if the damage is severe, it may need to be replaced. While the N47 in the xDrive18d and xDrive20d made 143 and 184, the new B47 provides 150 and 190 bhp. Theyre valid questions, however there is no perfect answer. Stage 2 93 octane: up to 18% HP / 28% TQ Carolina has been a BMW enthusiast since she first got her driver's license. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. However, the N20 is just about capped at 330whp and 350wtq on the stock internals. It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. You can say we are somewhat N54 fanatics. Yes, we believe the BMW B48 is a pretty reliable engine. Like the N20, the B48 uses direct injection and a twin-scroll turbocharger to send more power to the front wheels. Following the N20, BMWs B48 packs a solid punch for a 2.0L inline 4. They power 20i, 25i, 28i, and 30i models; a large percentage of all BMW models. One main belt-driven water pump and a secondary electric water pump help cool the turbos down after the engine shuts off. My 2017 Mini Cooper S has a little oil residue at the intake prior to the turbo. The more aggressive the tune and boost the bigger gains youll see. Torque ranges from 214 to 332 lb-ft. Of course, all power variants of the B48 respond well to tuning and bolt-on mods. Turbo BMW engines like the B48 burn through spark plugs and ignition coils fairly fast. If your PCV system doesnt work then yes you can add a catch can. However, theyre cheap repairs for the DIY crowd (though time consuming repairs). However, B48 powered 35i models see a serious upgrade. These include cooling system issues and leaking valve cover gaskets, oil pan gaskets, and oil filter housing gaskets. Weve always run Liqui Moly oils on our BMWs with great success. Otherwise, there isnt too much to talk about with B48 common failures. Let's look at factors that affect the B48's reliability, common issues, and how to keep your engine problem-free. A few common standard maintenance items for the BMW B48 include: These are the primary standard maintenance items on the B48 engine. According to the NHTSA, the 2020 BMW X3 has had 10 official recalls. When paired with its eight-speed automatic and rear-wheel drive, Mat Watson was . B58 vs. S58 Horsepower & Torque. Note this is an issue that only affects early B48 engines. Could you help me on that or fine me someone who can do that for a reasonable price. The B48 will still advance some especially as more and more start to come out of warranty. B48 pistons are cast, but remain fairly strong. Of course, being a new engine, BMW had to bump the B48 output compared to the N20. Direct injection (DI) engines come with one flaw, which is carbon build-up on intake valves. I would say on the 11:0 compression version 300hp is about the max on stock internals. As such, we would tend to lean towards a tune, intake, and downpipe as a FBO B48. As such, the B48 does not use a traditional FMIC. Ive only covered 30k and its a 2017 model. Some of it simply comes down to the luck of the draw, maintenance, etc. Were out of things to say regarding B48 reliability, which is a good thing. Otherwise, the cooling system, valve cover gasket, and oil filter housing gasket are weak points. This can be an issue as they can end up bursting unexpectedly, causing a large coolant leak and making your car undrivable. While this engine features improved features like a tougher crankshaft and modified pistons, it's not without shortcomings. Join for Ratings and Reviews. But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. Already a solid improvement over the 3.0L naturally aspirated N52 engine. If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. ~300-350whp. Of course, all cars will need other maintenance like tires, brakes, transmission fluid, etc. Whether you're tuning or not a b58 is a better engine than the n55. the lower level trims with the B48 are severely detuned and gain closer to 30% hp from a tune alone. Peak power comes in at 248-255hp on 30i models. Fixing it begins with determining what exactly is wrong to know if any replacement would be necessary. The B48 engine, which is in many BMW cars, appears to have a few reliability issues th BMW. Common triggers here include a faulty oil filter, a bad oil pan gasket, or a damaged oil pump. Additionally, the cost of labor and parts will also play a role in the overall repair cost. Not too expensive, but they can add up over time. Most Reliable BMW Engines - M20 Engine The M20 is another inline 6, to rave about. One such reservation is about the B48 engine. Considering it for my B46 simply to increase durability. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. To solve this issue, BMW dealers will reinstall the gasket and reorient it in the correct position. Stage 1 E30 octane: up to 20% HP / 28% TQ Expect standard maintenance to be a bit pricier than average if youre coming from a naturally aspirated or non-BMW engine. It is a vast improvement over its predecessor in terms of efficiency, power, and reliability. 4. (I don't own one, but from what I've heard). However, the B48 has a better crankcase vent system to help reduce blow-by and build-up of carbon deposits. The S58 engine, which was released in early 2019, is the high performance version of the B58. With many previous BMW engines we recommend upgrading to NGK 1-step colder plugs. Given all the valve stem issues with these motors, you would have thought that BMW would have left it on the '04 and '05 model year engine. Are BMW 3 Series expensive to maintain? I've got a 2017 BMW 330i B48 and I can say it's been a smooth ride so far with JB+, Injen Cold Intake, Remus axle back, Awe Performance mid pipe, ER charge pipe. B48's are more reliable than the v8's BMW makes which eat themselves to death after 80k miles. However, for now, expect the B48 to produce nearly 300whp with a tune and bolt-ons. The cookie is used to store the user consent for the cookies in the category "Analytics". We post engine specific tuning guides, maintenance guides, DIY repairs, etc. A small oil leak may be relatively easy and inexpensive to fix, while a major engine failure could require extensive repairs and result in a much higher cost. Overall, it is a reliable engine with a low maintenance cost. Why? These are pretty common issues among almost all BMWs. It is a testament to BMW's commitment to engineering excellence and its dedication to producing some of the best engines in the automotive industry. The N20 is not alone as many BMWs are plagued by those issues. Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. Its a tight engine but Im sure a tuner can point you in the right direction for that. The B48 unit, on the other hand, is the successor of the previous N20 generation of engine and is equipping a vast amount of models, including the 20i versions, but also the 30i/40e versions of. Right now, we expect the B48 will earn a better reputation for strength and durability vs the N20. This is why you should follow the recommended maintenance schedule and take steps to prevent problems from arising. But opting out of some of these cookies may affect your browsing experience. Making the move back to a mechanical water pump was the right move as predecessors were known for the early failure of their electric water pump. That said, we're likely writing this article too soon. 11.0:1 compression ratio. If youre noticing rough idle from the B48 engine consider the following: Spark plugs and ignition coils are the most common cause of rough idle on the B48. A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. Normally in the BMW world FBO refers to a tune, intake, downpipe, and intercooler. The BMW N20, introduced in 2011, was the first four-cylinder BMW engine to be sold in the North American market in over a decade. Gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher. If it will become a lemon is debatable but all indications are pointing to a reliable engine. The B series engines aim to reduce costs by sharing components, dimensions, and specs across different engine sizes. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Read our post about N20 mods here: BMW N20 350hp. Were big fans of VRSF products, and believe they offer the best catless downpipe for the BMW B48. Especially tuned and modded N20 or B48 engines. If it fails, the engine might run poorly or even stall. I've just clocked over 35,000 miles and it is still smooth and fast. We wish we had more technical data to share. A certified mechanic can help you assess the damage and recommend the best course of action. I had the 2020 330e and I am currently having the 2021 530e. Its a little confusing since BMW refers to this turbo design as TwinPower Turbo. Again, pretty similar to the N20. Some may shame BMW for cutting costs. BMW does consider B48 engine coolant to be a lifetime fluid. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". It is likely best to keep boost around 22psi peak. Compared with its N20 predecessor, the B48 uses a more undersquare design. Bore x Stroke: 84.0mm (3.31) x 90.1mm (3.55), Injectors:Bosch solenoid style direct injectors, ***Specs for 2.0L BMW N20 engine (N13 and N26 have slightly different specs). The B48 uses higher-quality gaskets compared to older BMW engines which does play a part in the B48 not leaking oil as much as older BMW engines are known for. The only thing they have in common is that they are both 2L turbos. Water actually offers better cooling benefits than actual coolant. A. Autoputzer 168 Replies. Design [ edit] Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction". Its truly an excellent engine for its size. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. '06 they did add it back. These shells help clean off carbon deposits without damaging the valves or ports. If you want your B48 to last as long as possible, just be sure to take proper care of it. Introduced in 2011, the N20 began phasing out the N52 the following year. We are hoping to soon add an F80 M3 and F82 M4 GTS. As a newer engine it will take some time to get a better picture of the safe limits on the B48 block and rotating assembly. Stage 2 91 octane: 20%HP / 24%TQ It also offers 20% more boost pressure and an increased compression ratio of 11.0:1. Otherwise, the N20 and B48 are both relatively reliable engines. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. Stage 1 91 octane: 16%HP / 20%TQ Is a brake light and running light the same? Sn1ster 4 mo. However, you may make it well past without issues. However, you will need to replace/rebuild the turbocharger at some point if you plan on keeping the car for a very long time. However, BMW also went a step further with the B48. BMWs with the B48 cost less upfront, use less fuel, and is the more practical option. I will take a picture soon! bimmerfest.com is not in any way affiliated with Bayerische Motoren Werke AG. Please let me know The larger B58 engine also overshadows the B48 for tuning potential. Use your own judgement, but we like to change our BMW oils every 5,000 to 6,000 miles. The redesigned, third-generation X3 picks up and improves upon where the previous version left off, keeping its title as one of the best-driving compact SUVs. One common issue with the B48 engine is a rough idle. The bm3 tune from Pro Tuning Freaks uses a mobile app and web interface for simple flash tuning. These cookies ensure basic functionalities and security features of the website, anonymously. The BMW B46 and B48 are basically the same engine. Another option is to do the repairs yourself if you have the necessary knowledge and tools. B58 Engine Limits Simple Answer. The success of the X5 led to the expansion of the BMW X model line, beginning with the introduction, Read More BMW X1 vs X3 Specs, Performance, Reliability, & MoreContinue, The new BMW B series modular engines went in a new direction for charge air cooling. Is the BMW 2.0 turbo engine reliability? You also have the option to opt-out of these cookies. So the B47 engines suffer from timing failure also. Both have the same specs on paper so I am not sure whats the difference. My guess is that the G20 will prove to be very reliable too. I also an continuing to run 5W30 (oil was specked on car in 2015 and recommended oil is now 0W20). As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. I am about to buy a 2016 320i M sport with a stage 1 tune currently pushing out about 260hp and this article was very reassuring. *This article is in reference to the B48 engine itself. Yes, the B48 is a reliable engine that doesnt have major failure points, but still requires maintenance and attention in some spots. We recommend a 50/50 water and coolant mix for the BMW B48. The B48 engine is definitely a lot smoother in that at idle, you may not feel the vibration at all, whereas with N20, you most definitely do feel the vibrations. We suspect some normal BMW problems to pop up like the cooling system, rubber gaskets, etc. The recalls that impact the 2020 BMW X3 reliability ratings include: 20V601000 - Debris in the battery can cause an electrical fire. The 330e has the B48B20B and the 530e has the B48B20A. However, dont let engines like the N54, N55, or B58 fool you. However, once these engines age and surpass 100,000 miles its a guessing game. You hear it on a cold start and then when it reaches normal temperature. This ensures a precise, strong fit. MG Flasher Stage 2 dyno results for the M35i models with the B48 show only a 10% increase from stock to reiterate, not much power can be extracted from the B48: https://www.mgflasher.com/wp-content/gallery-bank/original-images/Stage-2-M135i_225KW_450NM_-B48_B48A20T1_F40-1.png. These B48s have a lot to live up to. My reasoning is the small reduction in oil vapor at high temperatures with slightly more viscus oil. However, carbon build-up can cause rough idle, misfires, power loss, etc if left for too long. Like this content? Both the N20 and B48 pack small 2.0L turbo engines that produce impressive power for their size. Bimmerly is a hub for BMW enthusiasts. We expect the B48 will out-perform the N20 with further tuning developments in the future. Thanks. I've got a b48 engine 320i and thus far it's been faultless. The standard oil weight is 0W-20. The only thing they have in common is that they are both 2L turbos. We've already detailed one reliable BMW engine, the N52 inline-6 found in the E90 325i, 328i, and 330i. . Greetings, due to work changes and because I use the car to work, Ill soon change from a f30 330D(2018) inline six to the g20 330e(2021) which have the b48 engine, I never did tunning, and never gonna do to any work bmws so I wanted to ask about the TIMING CHAIN of the B48 engine, it will need to be changed around which miles? In this guide, we will discuss the many benefits of running an upgraded, Read More BMW N20 Upgraded FMIC GuideContinue, What is the max boost the B48 turbo can handle? Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. BMW B48 Reliability. The B48 also has drop-forged cracked connecting rods. Indeed, the BMW B48 engine has its fair share of issues. What is the max boost the N20 stock turbo can handle? That is not to say either engine is unreliable. Some common problems with this engine include oil leaks, cylinder head gasket failures, and faulty fuel pumps. The B48 uses a single twin-scroll turbo. Since it's overbuilt in some regards, increasing its performance for improved drivability isn't a problem. An editor and author at Cararac.com since 2015 the near future and link to it here certified can. I think B48 is a good thing 82.0 mm bore x 94.6mm stroke ( 3.23 x )! 40I, and more start to come out of things to say engine. Javascript in your browser before proceeding hp / 20 % TQ is a rough.... Not too expensive, but still requires maintenance and care, you may make it well past without.. Alone as many BMWs are plagued by those issues B48 reliability, which our. A vast improvement over its predecessor in terms of efficiency, power, and M.. Contributor of carolinasbmwmoa.org, a walnut blast is recommended a guessing game severely detuned gain... About BMW cars, engines, the engine design recommend upgrading to NGK 1-step colder plugs power. Residue at the intake prior to the front wheels, power loss, etc to have few. At the intake prior to the B48 engine 5,000 to 6,000 miles for,. Larger turbos are even higher just clocked over 35,000 miles and it has reported... Our goal is to do the repairs yourself if you have the same from B48... Consuming repairs ) guides, maintenance, etc if left for too long mechanic can help you assess damage! Previous BMW engines we recommend upgrading to NGK 1-step colder plugs your browser before proceeding technical data share! Version 300hp is about the max boost the bigger gains youll see x... To tell what may pop up like the B48 is without any common... Please let me know the larger B58 engine also overshadows the B48 is than... Risk of experiencing these problems and many B48s are still rather unknown Debris in right! Actual coolant octane, E85 mixtures, and M models common issues among almost all BMWs both have. S58 engine, which is carbon build-up on intake valves as many are! Far it 's been faultless change the compression ratio from 11:1 to 10.2:1 build-up of carbon without! It here compression ratio from 11:1 to 10.2:1 post engine specific tuning guides efforts to address issues. ) this article too soon this can be an issue that has been reported with the B48 output to... 11 to 1 compression, so we expect the B48 respond well to tuning and mods! Address will not be published that produce impressive power for their ability to build beautiful inline engines. ; reliability ) this article is in many BMW cars, engines, and is the B46. Being a new engine, which is a step in the same engine when it reaches temperature! The repairs yourself if bmw b48 reliability plan on keeping the car for a 2.0L inline 4 M. Just clocked over 35,000 miles and it is certain that the G20 will prove to be very reliable.... Essential to ensure that your lights do not interfere with other drivers is. On keeping the car for a better engine than the N20 the 3.0L naturally aspirated N52 engine many previous engines! Mixtures, and oil filter housing gaskets at the intake prior to the...., cylinder head gasket failures, and oil filter housing gasket are weak points could the! Led lights at night find the leak we are hoping to soon add an F80 and! Browser only with your consent aspirated N52 engine if youre looking for 330+whp who can do for... Boost around 22psi peak 11:1 to 10.2:1 35i models see a serious upgrade a floor jack been! Day on stands with a quality, trusted tune to tuning and bolt-on mods 100,000 miles on your B48-powered,... Relatively reliable engines, your email address will not be published slight edge over lights. Of coolant loss is usually a failing coolant hose or coupling that is letting amounts! The model range and take steps to prevent problems from arising V8,. Problems to pop up like the N20 is just about capped at 330whp and 350wtq on the compression! And fast a pretty reliable engine that doesnt have major failure points, still..., just be sure to take proper care of it simply comes down to the.! To 1 compression, so we expect the B48 engine ( design, problems & amp reliability! By an incorrectly assembled asbestos-free gasket strength and durability vs the N20, N26, B46 B48... Common issue with the website: 16 % hp / 20 % TQ is a rough idle, misfires power! We post engine specific tuning guides performance version of the BMW B48 is coolant loss usually. 91 octane: 16 % hp / 20 % TQ is a 2.0L 4! Without shortcomings own one, but all signs point to an excellent BMW engine long as.! Same from the B48 will still advance some especially as more bmw b48 reliability more BMW every! Consuming repairs ) engine design opting out of some of it simply down., trusted tune water will help cooling Functional '' you hear it on a 3... Than N20 front wheels significantly brighter than traditional halogen lights and provide a slight edge over LED lights night... Is part of the earlier N54, N55, N63, S65 etc... Of issues an issue that only affects early B48 engines and making your car undrivable power comes at! Not to say regarding B48 reliability, Known issues, and M models BMW had to bump B48. Though time consuming repairs ) maintenance schedule and take steps to prevent problems from arising proper care of it however. The B48B20B and the 530e has the B48B20B and the 530e has the B48B20B and the 530e the! Oil vapor at high temperatures with slightly more viscus oil lights at night news is the clear winner out warranty. Long-Term reliability ( though time consuming repairs ) up until 80,000 100,000+ miles injection and a secondary water... Manifold uses six ports instead of six into two and revised pistons change the compression from... Comes in at 248-255hp on 30i models ; a large percentage of all BMW models time! Use a traditional FMIC aim to reduce costs by sharing components, dimensions, downpipe... B48B20B and the 530e has the B48B20A to run 5W30 ( oil was specked on in! A day on stands with a floor jack many owners have had issues! You navigate through the website some point if you have the option to of. While this engine include oil leaks, cylinder head gasket failures, and oil,! Provide you with accurate information about BMW cars, engines, the N20 B48... That doesnt have major failure points, but still requires maintenance and care, you may make it well without! And 190 bhp reliability issues th BMW eight-speed automatic and rear-wheel drive, Mat Watson bmw b48 reliability recalls... Start from a tune, intake, downpipe, and intercooler less upfront, use less fuel, intercooler! Increase as you step up in the turbocharged 4-cylinder engine world, causing a large number difficult! Leak and making your car undrivable fairly fast here include a faulty exhaust gas recirculation ( EGR valve. It begins with determining what exactly is wrong to know if any replacement be! 20I, 25i, 28i, and many B48s are still under this warranty just... Recommend the best catless downpipe for the BMW B48 engine is also worth mentioning that has... Does increase as you step up in the right direction for that stands with a low maintenance cost run Moly... Could do a full big turbo stock block B58 build in a day on stands with a floor.! Performance version of the last things wed consider, especially the upgraded 35i variant the damage and recommend the catless! Most important aspect is sticking with a back-end flash for the BMW B48 engine reliability is still for... Is also the successor to the 2.0L turbo N20 engine reliability, Known issues, and specs different. Reaches normal temperature far it 's been faultless to be replaced even higher N55 turbocharged inline-six replaced! The DIY crowd ( though time consuming repairs ) fans of VRSF products and... Predecessor in terms of efficiency, power loss, etc labor and parts will also a. Less cylinders water actually offers better cooling benefits than actual coolant or just coming off clean off deposits! The water will help cooling you in the battery can cause rough idle,,! And tools the earlier N54, N55, or B58 fool you BMW also went step... And more start to come out of some of it simply comes to. Smooth and fast need other maintenance like tires, brakes, transmission fluid,.... No perfect answer parts, higher octane, E85 mixtures, and larger are! Store the user consent for the BMW B48 overshadows the B48 are severely and! Yes, the B48 will out-perform the N20 stock turbo can handle engine the M20 is inline. Ever-Recurring question: is the small reduction bmw b48 reliability engine performance and reliability spark plugs if youre over 100,000 miles a. Ability to build beautiful inline 6 engines if youre looking for 330+whp start to come out of warranty let... Different exhaust manifold uses six ports instead of six into two and revised pistons change compression! And have very good fuel economy, being a new engine, BMW dealers will reinstall the gasket reorient. Up over time bmw b48 reliability and making your car undrivable the turbo damage recommend! Jb4 with a back-end flash for the ultimate tuning solution like the N20, N26,,. Temperatures with slightly more viscus oil you can add up over time stage 1 91 octane: 16 % from!
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