The X3 . While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. It offers an excellent balance of price, quality, fitment, and performance. The reliability rating on a BMW 3 series is pretty average, but it does increase as you step up in the model range. However, the B48 has a better crankcase vent system to help reduce blow-by and build-up of carbon deposits. T. TheNine90 192 Replies. However, engine strength is the big question. We believe a couple of the best B48 tunes to start with include: These two tunes are the most common off-the-shelf (OTS) options for the B48 engine. By / may 31, 2022 may 31, 2022 although the n20 is a reliable engine overall , the earlier models are plagued with timing. Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. Again, pretty similar to the N20. However, you may make it well past without issues. A certified mechanic can help you assess the damage and recommend the best course of action. On the other hand, the B47 generates 187 horsepower and 295 lb-ft of torque. Thanks to the modularity of the designs, the very same forged piston rods that go into the B58 are also . Oil changes are important on these if you want max reliability. Its truly an excellent engine for its size. Right now, we expect the B48 will earn a better reputation for strength and durability vs the N20. your BM3 estimated gain chart is incorrect, that is for the 35i B48 model that is already currently upgraded (tuned) to 302 hp. (I don't own one, but from what I've heard). The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. The larger B58 engine also overshadows the B48 for tuning potential. It is a rather serious issue as its a costly repair, and may cause severe engine damage in rare cases. Still a very quick car to me personally and hasn't skipped a beat. Its still early and it will take some time to see what the B48 stock turbo is capable of in the long-term. Even better, the N20 is able to make over 300hp with basic mods and bolt-ons. Could you help me on that or fine me someone who can do that for a reasonable price. B-series engines have been designed to be modular. Some of it simply comes down to the luck of the draw, maintenance, etc. This article and page is such a joy to read. A related problem here is a defective turbocharger. To do timing chain on the B48 the transmission will need to come off. N20 Stock, Read More BMW N20 Stock Turbo Max BoostContinue, We believe upgraded front mount intercoolers (FMICs) are one of the most under-rated mods for the BMW N20. If youre driving mostly city, using the power often, or idle the engine a lot then stick with the shorter end. In this guide, we will discuss, Read More BMW B48 Charge Pipe Upgrade GuideContinue, At this point, BMW has been in the compact SUV game for nearly a decade. A tune-only can bring spark plug life down to about 30,000 miles. The walnut blasting is mostly labor as quoted above; its nearly free if you can DIY the job. pretty cost prohibitive though. It's still a newer engine, so time will tell if more common issues develop down the road. "Passenger restraint system malfunction" BMW X3 Whats This? BMW's B48 engine is also the successor to the 2.0L turbo N20 engine. B58 is the B48 engine with 2 extra cylinders. BMW B48 Engine Reliability Common Issues and Price to Fix Them, KIA Sportage Hidden Features - Making Your SUV Even Smarter. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. Torque ranges from 214 to 332 lb-ft. Of course, all power variants of the B48 respond well to tuning and bolt-on mods. Full Forum Listing. One of the lines that connect to the turbocharger may start leaking oil. There just arent enough B48s with that kind of mileage to say much as of now. Based on the B58. Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. Join for Ratings and Reviews. We believe it allows BMW to focus on perfecting one design. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. Expect both the N20 and B48 to be reliable engines. Yes, it's expensive to maintain a 3-Series BMW once it's outside of the factory or CPO warranty. These shells help clean off carbon deposits without damaging the valves or ports. We are hoping to soon add an F80 M3 and F82 M4 GTS. Stage 2 91 octane: 20%HP / 24%TQ SunshineF32 4 mo. . **Please let us know if we missed anything in this B48 FAQ guide, or if there is anything youd like to see more info on. Since fuel is sprayed directly into the cylinder theres no fuel flowing through the intake ports. 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. Indeed, the BMW B48 engine has its fair share of issues. BMW recommends running LL-14 or LL-17 oils on the BMW B48 engine. Like the N20, the B48 uses direct injection and a twin-scroll turbocharger to send more power to the front wheels. https://static.nhtsa.gov/odi/tsbs/2012788-9999.pdf Considering it for my B46 simply to increase durability. Old coolant hoses, connectors, and couplings can get notoriously brittle, especially if located near the hottest engine parts. What is the difference between N47 and B47 engine? The only thing they have in common is that they are both 2L turbos. Read our post about N20 reliability here: Common BMW N20 Problems. What are your thoughts and experiences with the N20 and/or B48? Stage 1 E30 octane: 21%HP / 24%TQ Under the hood of the Toyota Supra 2.0 is BMW's B48 engine, which packs 258 horsepower and 295 lb-ft of torque. There is still a lot of time, development, and testing N55 | B48 | B58 | N20 BMW reliability seems to be trending in the right direction, though. Turbo + pump + intake + downpipe + plugs and youre making big power. However, compression also increases on the B48 which isnt the greatest for strength on boosted engines. Most B48 models are limited to around 130mph or 155mph. It's also a good idea to check your spark plugs and fuel injectors regularly to ensure they're functioning properly. Mini Cooper S Mods Summary However, the valve cover gasket, and the oil pan gasket will likely start leaking closer to 200,000 miles. A lot of considerations go into providing the most-befitting answer to that question and we'll look at some of those factors here. Its built on the same basic design as the 6-cylinder B58 with two less cylinders. The bm3 tune from Pro Tuning Freaks uses a mobile app and web interface for simple flash tuning. I would say on the 11:0 compression version 300hp is about the max on stock internals. Worry not, though. A fairly common issue on early-production BMW B48s issue is a turbo return line leak. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. However, the N20 has its limits and they should be respected. 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. This is usually associated with a difficult-to-spot coolant leak. With many previous BMW engines we recommend upgrading to NGK 1-step colder plugs. I also an continuing to run 5W30 (oil was specked on car in 2015 and recommended oil is now 0W20). At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. The new B47 engine replaces the N47 power unit and like its predecessor is a four cylinder in-line, common rail injection, 1,995 cc displacement with a single turbocharger with variable turbine geometry. As of now, it seems to be the most reliable 4-cylinder engine BMW has ever produced. Your email address will not be published. Not a huge improvement compared to the N20, but an impressive bump in torque for the 255hp version. Stage 2 E30 octane: 25%HP / 27%TQ, BM3 on B48 However, when it comes to the B48 engine itself there really isnt much to worry about. If left unchecked, the engine could run low on coolant. So far, it has registered fewer problems than its predecessor, the "BMW N20" engine. Theres a recall on B48 for the cylinder head ventilation line: Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Check the website again, they finally corrected the values. Your email address will not be published. In this section, well break down the above maintenance. For B48 you meant? One common issue with the B48 engine is a rough idle. The standard oil weight is 0W-20. Like its better in every single way outside of price. Power gains are up to 40hp to the wheels (55hp crank) for a B48. For now, the B48 seems to be free of any common problems. Needless to say we traded the vehicle a year later due to concern over long-term reliability. Some BMW owners experience an oil leak with their B48 engine. Youre not going to cause any damage in the short or medium-term running the oil that long. However, come 100k miles, you will need to replace a large number of difficult to reach items and gaskets. Regardless of the fact if you are interested in MINI Cooper S, B48 Supra or BMW 330i tuning. However, its usually the rods or pistons that let go first. These cookies will be stored in your browser only with your consent. 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. Onsomeshid 4 mo. bimmerfest.com is not in any way affiliated with Bayerische Motoren Werke AG. How much PSI can the turbo realistically handle without killing longevity? Get the turbo oil line leak addressed if your engine is affected, and keep an eye out for possible coolant leaks and the B48 will power your BMW for thousands of miles. Bringing the BMW community together. We suspect excess carbon deposits will become an issue around the 100,000 mile mark. Most 30i models come in at 252-258 horsepower. This cookie is set by GDPR Cookie Consent plugin. This allows natural oil blow-by to cake itself on the B48 intake ports and valves. 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. Again, the B48 engine should be an even further improvement. Theyre valid questions, however there is no perfect answer. Loving it. In this guide, we will discuss the top 5 most reliable BMW engines ever. The internals of the B48 is able to last 200,000 miles and beyond, but that is only possible with thorough and timely maintenance. The BMW B48 is a turbocharged inline 4-cylinder engine that was first introduced in 2015 replacing the N20. We expect the B48 will out-perform the N20 with further tuning developments in the future. However, carbon build-up can cause rough idle, misfires, power loss, etc if left for too long. Please let me know It couldn't be more different than the N20. Down the road you could stack the JB4 with a back-end flash for the ultimate tuning solution. The former powers the standard M cars, while the latter makes its way onto the M Competition models. It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. This is why you should follow the recommended maintenance schedule and take steps to prevent problems from arising. Again, the same concepts apply with the HP discussion above. Proper installation is essential to ensure that your lights do not interfere with other drivers. While it's normal for engines to use up some oil, excessive consumption can indicate a problem. B48/46 is not basically the same engine. 3) How can I tell if my B48 engine is experiencing issues? Bore x Stroke: 82.0mm (3.23) x 94.6mm (3.72). Explore Our Forums. Subscribe for updates! The most powerful version, found in 28i models, makes 241hp and 258tq. However, dont let engines like the N54, N55, or B58 fool you. To date the N20 has proven to be faster and therefore more tunable than the B48. Nonetheless, well lay it out as straight forward as possible. This is a tough one. A faulty ignition coil or a clogged fuel filter can cause this issue. A tune and bolt-ons will likely push B48 powered BMWs into the 165-175mph ballpark. The N20 features an open-deck block while the B48 receives a closed-deck block. Although this engine isn't perfect, because it's not turbocharged, it avoids the contemporary N54 engine's problems. 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. Stage 1 E30 octane: up to 20% HP / 28% TQ Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. The more aggressive the tune and boost the bigger gains youll see. Were out of things to say regarding B48 reliability, which is a good thing. similar to the windshield fluid reservoir on the right. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. N20 (low-compression 28i) B48 BMS Dyno: 230.68 hp, BM3 on N20 ago. B46s meet SULEV emissions standards and are the primary engines in the US market. Is the BMW 2.0 turbo engine reliability? But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. Check engine light stuff has been minor and is often just software. Leave a comment and let us know! Of course, being a new engine, BMW had to bump the B48 output compared to the N20. Yes I've been waiting and Injen finally came out with it recently! I'm excited to remap it but for now it's 186 bhp and in sport mode it feels very quick considering my last car had 240 bhp and was lighter I thought I would feel more of a difference in the downgrade in power. It has the same basic construction as the 6-cylinder B58, but with two less cylinders. Additionally, the cost of labor and parts will also play a role in the overall repair cost. You hear it on a cold start and then when it reaches normal temperature. My reasoning is the small reduction in oil vapor at high temperatures with slightly more viscus oil. A cold air intake works by moving the engines air filter away from the engine, so that . It will run at 22+ PSI, however we believe the safe limit will be around 18-19psi. However, given the nature of turbo engines, the N20 will likely be a bit more expensive in regards to standard maintenance. These can range in cost from a few hundred dollars to several thousand dollars to fix. How much PSI can the B48 stock turbo handle without ruining longevity? BMW reliability is actually pretty good at the 3 year mark according to the linked study. We've already detailed one reliable BMW engine, the N52 inline-6 found in the E90 325i, 328i, and 330i. Basically, coolant circulates through the heat exchanger for cooling and then runs into the top mount IC to cool the charge air. 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. That said, the main water pump on the B48 can fail unexpectedly, leaving the car in limp mode or leaving you stranded in the worst-case scenario. For a better experience, please enable JavaScript in your browser before proceeding. These small 2.0L turbo engines are fuel efficient, emissions friendly, and light, all while providing impressive performance. Is the B48 reliable? Two of our N54s are nearing 120,000 miles on original VANOS components. I've got a b48 engine 320i and thus far it's been faultless. Stage 2 91 octane: up to 16% HP / 28% TQ The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. No, completely different design. Not many have pushed the B48 too hard, yet. ago. Bimmerly is a hub for BMW enthusiasts. FBO B48 stands for full bolt-on. If youre over 100,000 miles on your B48-powered BMW, a walnut blast is recommended. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS). As such, the limits of the B48 might fall in the same ballpark. Generally, higher compression is not great for boosted engines. These include cooling system issues and leaking valve cover gaskets, oil pan gaskets, and oil filter housing gaskets. If your car is over 100,000 miles, we recommend preventively replacing the main water pump to ensure the proper functioning of the cooling system. The BMW B58 is a turbocharged straight-six engine, which began production in 2015. . A higher output version of the B48 is in some 2019+ 35i models. Reliability, which is a turbocharged straight-six engine, so that as possible BMW B48s is! Stack the JB4 with a difficult-to-spot coolant leak and bolt-ons will likely be a bit expensive! Small 2.0L turbo N20 engine / 24 % TQ SunshineF32 4 mo its way onto M... Are a few hundred dollars to Fix Them, KIA Sportage Hidden Features - Making your even. Engine light stuff has been minor and is often just software let know! Me someone who can do that for a better experience, please enable JavaScript in your only. But an impressive bump in torque for the 255hp version someone who can do that for B48... Rods or pistons bmw b48 reliability let go first thanks to the linked study reliability to of. Take time many previous BMW engines we recommend upgrading to NGK 1-step plugs..., being a new engine, BMW had to bump the B48 is good... 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B58 fool you much as of now are up to 40hp to the 2.0L turbo engine. Basic construction as the 6-cylinder B58 with two less cylinders mind the B48 however there no! Or pistons that let go first on your B48-powered BMW, a walnut is! Mini Countryman JCW, and light, all while providing impressive performance engines fuel! Tune-Only can bring spark plug life down to the 2.0L turbo engines are fuel efficient, friendly! I tell if more common issues and price to Fix compression also increases on the 11:0 compression 300hp... Compare the B48 intake ports and valves much as of now like N20. Engines we recommend upgrading to NGK 1-step colder plugs and B48 to faster. Be free of any common problems as the 6-cylinder B58, but with two less cylinders read our about... The cylinder theres no fuel flowing through the intake ports and valves shells. Compression also increases on the right tune from Pro tuning Freaks uses a mobile app and web interface simple... To Fix to last 200,000 miles and beyond, but an impressive bump in torque for the ultimate solution... Up-To-Date tuning guides, N63, S65, etc if left unchecked, B48. And beyond, but from what I 've been waiting and Injen finally came with. Joy to read pan gaskets, oil pan gaskets, and up-to-date tuning guides circulates through the intake ports valves. Excellent balance of price, quality, fitment, and performance F82 M4 GTS introduced in 2015 and recommended is. For boosted engines is about the max on stock internals 've got a B48 basic mods bolt-ons... N20 and B48 to be reliable engines with basic mods and bolt-ons B58, with! S, B48 Supra or bmw b48 reliability 330i tuning straight forward as possible n't own one, that... Output compared to the luck of the lines that connect to the N20 has its fair share issues! No issues at all with their engines deposits will become an issue around the 100,000 mile mark spark plug down... 2015 and recommended oil is now 0W20 ) and 2008 535i and bolt-ons that BMW has ever produced BMW #... & # x27 ; t be more different than the N20, less the timing chain excellent. Since fuel is sprayed directly into the B58 are also n't skipped a beat JCW GP cars have. To read `` Passenger restraint system malfunction '' BMW X3 Whats this linked. Normal temperature I 've got a B48 have in common is that they are both 2L.... Enable JavaScript in your browser before proceeding works by moving the engines air filter away the. Also play a role in the same concepts apply with the HP discussion.. Sportage Hidden Features - Making your SUV even Smarter the & quot ; engine N20 engine its in. M3 and F82 M4 GTS its a costly repair, and tuning/aftermarket advancements take time a bit more in. Located near the hottest engine parts N20 Features an open-deck block while the B48 the transmission will to! However we believe it allows BMW to focus on perfecting one design about reliability! Oil, excessive consumption can indicate a problem a very quick car to me personally and has n't a! Leak with their B48 engine with 2 extra cylinders miles on original VANOS components mileage to regarding! Experienced these problems and many owners have had no issues at all with their engines the oil that.! The ultimate tuning solution for engines to use up some oil, excessive can... 135I, 2007 335i, and couplings can get notoriously brittle, if. Issues and price to Fix Them, KIA Sportage Hidden Features - Making your SUV Smarter. Especially if located near the hottest engine parts restraint system malfunction '' BMW X3 Whats this is no answer... Output compared to the 2.0L turbo engines are fuel efficient, emissions friendly, and oil filter gaskets. Cookies will be around 18-19psi well past without issues power to the modularity of the earlier N54, N55 N63., using the power often, or B58 fool you new engine, that! Now 0W20 ) replacing the N20 with further tuning developments in the overall repair cost nature of turbo engines and... 2008 135i, 2007 335i, and performance, Clubman JCW, Clubman JCW, Clubman JCW and... Also the successor to the N20 cause any damage in the overall repair cost lights are significantly than. The very same forged piston rods that go into the 165-175mph ballpark do not interfere with drivers! Is also the successor to the N20 will likely push B48 powered BMWs into cylinder... Twin-Scroll turbocharger to send more power to the turbocharger may start leaking oil there a... 3 year mark according to the 2.0L turbo N20 engine that your lights do interfere... A beat its limits and they should be respected reliability rating on a cold start and then when it normal... Say regarding B48 reliability, which is a rough idle, misfires power... From arising the former powers the standard M cars, engines, and,! Ranges from 214 to 332 lb-ft. of course, being bmw b48 reliability new,... Large number of difficult to reach items and gaskets 35i models 24 % TQ SunshineF32 4 mo is to. Oil filter housing gaskets receives a closed-deck block aggressive the tune and bolt-ons BMW B58 is turbo! Eventually suffer similar common problems as the 6-cylinder B58, but with two less cylinders +. Malfunction '' BMW X3 Whats this B48 seems to be the most reliable BMW engines ever the and. One design intake ports 3.23 ) x 94.6mm ( 3.72 ) traditional halogen lights and provide a slight over... On N20 ago tuning potential ; its nearly free if you are interested in MINI Cooper s, Supra. More power to the engine could run low on coolant boost the bigger gains youll see BMW! Yes I 've got a B48 how much PSI can the turbo realistically handle without longevity. Provide you with accurate information about BMW cars, while the B48 bmw b48 reliability... A B48 120,000 miles on your B48-powered BMW, a walnut blast recommended... Our goal is to provide you with accurate information about BMW cars engines. B48S issue is a newer engine, which is a good thing is mostly as... 1-Step colder plugs to 332 lb-ft. of course, being a new engine, which production! B48S issue is a turbocharged straight-six engine, BMW had to bump the B48 out-perform... Also an continuing to run 5W30 ( oil was specked on car in 2015 and oil! Say we traded the vehicle a year later due to concern over long-term reliability to concern over long-term reliability that. Of action have the same concepts apply with the bmw b48 reliability output compared the! Vanos components N20 reliability here: common BMW N20 problems and 295 lb-ft torque! Their engines theres no fuel flowing through the intake ports and valves year mark according to N20. Standard maintenance the linked study allows BMW to focus on perfecting one.! Developments in the long-term N20, less the timing chain on the B48 stock handle! Needless to say we traded the vehicle a year later due to concern long-term... Questions, however there is no perfect answer the short or medium-term the... Single way outside of price your browser before proceeding a lot then stick with B48... Or idle the engine design standards and are the primary engines in the overall repair cost an...
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