Anyways, B48 maintenance isnt horrible as shown above. Somebody knows? The B48 also has drop-forged cracked connecting rods. Nonetheless, well lay it out as straight forward as possible. One main belt-driven water pump and a secondary electric water pump help cool the turbos down after the engine shuts off. This is not meant to be a knock towards the N20s performance. 4. Right now, we expect the B48 will earn a better reputation for strength and durability vs the N20. Design [ edit] Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction". The internals of the B48 is able to last 200,000 miles and beyond, but that is only possible with thorough and timely maintenance. Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. The N20 does have a well known problem in the timing chain. BMW changed to a top mount air-to-water intercooler design. E90/E91/E92/E93 (2006 - 2013) E39 (1997 - 2003) E46 (1999 - 2006) E36 (1991 - 1999) E60 / E61 (2004 - 2010) Top Contributors this Month View All shawnsheridan 442 Replies. Whether or not these upgrades are worth it on the B46/B48 is up for debate. PIcs? BMW B58 Engine. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. The B series engines aim to reduce costs by sharing components, dimensions, and specs across different engine sizes. Thanks a lot! . However, dont let engines like the N54, N55, or B58 fool you. do you think that is true and why is that? A longer stroke helps the B48 make a lot of low-end and mid-range torque. "Passenger restraint system malfunction" BMW X3 Whats This? Source: . ~300-350whp. The NGK 97506 spark plugs are OE for the older N20 engine. 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. But recent BMWs seem to be getting notorious for minor issues, increasing concerns about reliability. Overall, expect the BMW N20 to be a reliable engine. This valve is responsible for reducing emissions by recirculating some of the exhaust gasses back into the engine. It couldn't be more different than the N20. Turbo + pump + intake + downpipe + plugs and youre making big power. Its a fairly simple fix and is covered under warranty. B48s with tunes and bolt-on mods may consider running more expensive, high-end racing oils. Under the hood of the Toyota Supra 2.0 is BMW's B48 engine, which packs 258 horsepower and 295 lb-ft of torque. Have any issues diagnosed by a professional mechanic as soon as possible to avoid further damage to the engine. We are BMW enthusiasts and aim to provide you with everything you need to turn your stock BMW into a horsepower monster. Turbo engines, especially when modded, love to burn through spark plugs and ignition coils. 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. Early models are becoming well priced due to their age and the release of the new generation 3 series. ago. Why? My reasoning is the small reduction in oil vapor at high temperatures with slightly more viscus oil. Has BMW addressed this with any design to baffle the oil vapor in the PCV system? Bimmerly is a hub for BMW enthusiasts. See here for data: BMW N20 / B48 Quarter Mile Rankings, https://www.facebook.com/groups/244324833434651. What BMW's use the B48 Engine? Just past 55k miles on it. You can say we are somewhat N54 fanatics. Carbon buildup is a common issue that can affect any engine with direct injection such as the B48. I have done so far 36000 miles in my 320i b48 and it has been faultless. You can say we are somewhat N54 fanatics. We are BMW enthusiasts and aim to provide you with everything you need to turn your stock BMW into a horsepower monster. 1) Is the BMW B48 engine prone to issues? The carbon that builds up is the remnant of the incomplete combustion process. "Emission System Problem" in Honda Civic - What Does This Mean. Do your thorough research and weigh the potential pros and cons before making a decision, if you are still trying to decide on engines. Stage 1 93 octane: 18%HP / 22%TQ the lower level trims with the B48 are severely detuned and gain closer to 30% hp from a tune alone. We suspect some normal BMW problems to pop up like the cooling system, rubber gaskets, etc. 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. This helps the engine support the additional boost and power. Subscribe for updates! The cookie is used to store the user consent for the cookies in the category "Other. Although this engine isn't perfect, because it's not turbocharged, it avoids the contemporary N54 engine's problems. Although, dont expect these engines to be as tuner-friendly as the larger inline 6 turbo BMW engines. 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. Like the N20, the B48 uses direct injection and a twin-scroll turbocharger to send more power to the front wheels. BMW does consider B48 engine coolant to be a lifetime fluid. The BMW B48 is a turbocharged inline 4-cylinder engine that was first introduced in 2015 replacing the N20. When comparing the horsepower and torque of both engines in stock form, the S58 is the clear winner out of the two. Gasket oil leaks can be expensive repairs at the shop. One common issue with the B48 engine is a rough idle. BMW B48 Reliability. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. So the B47 engines suffer from timing failure also. To fix this issue, you'll need to diagnose the root cause and replace the faulty component. Content on bimmerfest.com is generated by its users. With many previous BMW engines we recommend upgrading to NGK 1-step colder plugs. I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. We recommend changing the B48 oil every 5,000 to 8,000 miles. However, some B48 engines have experienced issues with the tensioner, which can cause the chain to become loose and lead to engine damage. In this, Read More BMW B46/B48 Intercooler & Heat Exchanger GuideContinue, BMWs F30 generation includes the F30, F31, and F34 produced from 2011 to 2019. If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. . 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! This website uses cookies to improve your experience while you navigate through the website. Bore x Stroke: 82.0mm (3.23) x 94.6mm (3.72). Thanks to the modularity of the designs, the very same forged piston rods that go into the B58 are also . You should first look at the basic info about an engine platform, then write something somebody might read this and get the wrong picture. Tune only cars are able to push over 260 wheel horsepower and 290 wheel torque. Again, pretty similar to the N20. In realty, B48 powered vehicles like the F30 are slower than their N20 counter parts (see CR and C&D test results with similar specs cars) tuners have not been able to extract as much power out of the B48 either by PTF and Dinan: N20 Dinan Dyno: 268 hp Both have the same specs on paper so I am not sure whats the difference. Yes, the B48 crank and connecting rods are forged as with the larger B58 6-cylinder. Its still early and it will take some time to see what the B48 stock turbo is capable of in the long-term. However, B48 is the widely accepted engine code for the B46 and B48. *Well write a B48 common problems article in the near future and link to it here. Add more bolt-ons and mix in some aggressive driving and B48 spark plugs may require changing every 15,000 miles. As with most 3 series, the F30 is a great success and all around fun, sporty chassis. You also have the option to opt-out of these cookies. We review the N55's performance and reliability. It covers the vast majority of questions and I would say is respectfully fair in assessment(fact based opinion) and etc. However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. Regardless, in this post we will lay it out as clearly as possible. We state several times they offer very similar performance stock, with a tune, and other bolt-ons. Yes, the B48 is a reliable engine, especially if we compare it to the N20 which had major timing chain issues. From fuel pump failures to cylinder head gasket leaks, BMW owners with this engine have had to deal with costly repairs and downtime. Its also not overly expensive, especially for those willing to DIY some maintenance. 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. The lower level variants actually gain way more than the N20. (N20 engine code), and go for something post 2016 with a 30i moniker, denoting the new B48 engine being used. It's still a newer engine, so time will tell if more common issues develop down the road. Installed bootmod3 stage 1 93 on it this weekend. BMW reliability seems to be trending in the right direction, though. To solve this issue, BMW dealers will reinstall the gasket and reorient it in the correct position. The B48 is a 2L turbocharged inline-4 petrol engine from the BMW B-series modular engines; depending on the version, it generates 154-302 horsepower and 250-450 nm torque. Definitely a sound improvement for the B48. How much PSI can the B48 stock turbo handle without ruining longevity? Although, the B58 is successful with its 11 to 1 compression, so we expect the same from the B48. I will dyno it before mapping as it feels more like 200 bhp but I've been quoted 260 on the remap. Many owners complained about the B48 losing coolant even though no obvious leaks are visible (ghost leaks). I think the most important part is that you get the downpipe with the right bottom clamp. Yes I've been waiting and Injen finally came out with it recently! It is likely best to keep boost around 22psi peak. As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. However, stick with 50/50 if you live in an area thats subject to near or below freezing temperatures. Not too expensive, but they can add up over time. Some claim it's reliable by "BMW standards" but we believe the B58 delivers good reliability by any standard. 93 likes, 17 comments - Built by Felix (@builtbyfelix) on Instagram: " We are pleased to announce after a brief stint, we are now your official indepen." We know the older 2.0L N20 engine can handle about 350whp and 350wtq before problems normally arise. It receives a stronger crankshaft, bearings, and pistons while dropping the compression ratio to 9.5:1. Gonna be hard to tell as it's only been out a few years, but generally I'd consider it a reliable and solid engine. The B47 has proven to be reliable so far in my mothers 320d. Stage 1 E30 octane: up to 20% HP / 28% TQ Its difficult to tell how well the B48 is going to fare long-term as the engine is still fairly new. 320hp on the 10.2:1 (B48a20b). Tally how many spark plug wires are present. Nowack (SAE SN) test a bit lower with higher viscosity oil. It was shown off in May 2019. The S58 engine, which was released in early 2019, is the high performance version of the B58. Well, nothing is perfect. It's reliable, efficient, and sporty. Engine limits are always a tough topic. Stage 1 91 octane: 16%HP / 20%TQ Yes, the BMW B48 engine is very reliable compared to similar BMW engines. Water actually offers better cooling benefits than actual coolant. Its still a newer engine, so time will tell if more common issues develop down the road. The BMW X5 really put the Bavarian marque on the family-hauling map in 1999, quickly becoming one of BMWs best-selling models. Im putting one in one the left behind the bumper under the headlight. Use the following keys to search for a specific topic: We will break the B48 FAQ guide into the following subjects: The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. B-series engines are a vast improvement - at least based on design changes - but it will take a few years of real world use to produce enough data. Mod for mod the B48 probably wont ever have a big advantage over the N20, if any at all. Ive only covered 30k and its a 2017 model. The N20 never earned a great reputation for strength. BMW uses plastic for many of these connectors on the B48, which tend to contract and expand and thus can crack, break, and cause a leak. Regardless of the fact if you are interested in MINI Cooper S, B48 Supra or BMW 330i tuning. Otherwise, scroll down and check out some more awesome B48 content. VANOS solenoids are another potential problem that may cause rough idle. No issues with my 2018 B46. Onsomeshid 4 mo. Tons of tunes are around, and the best one usually comes down to personal preference and goals. As with spark plugs, exact life of ignition coils depends on mods and driving habits. Another representative of the modular family, the BMW B48 engine comes in the shape of a more compact four-banger. Notably, the F30 generation was, Read More Ultimate BMW F30 Buyers Guide: Reliability & PerformanceContinue, Very nice article. 2) Can the BMW B48 engine be repaired or does it need to be replaced? The BMW 520d came with a 2.0L Diesel with similar engines to the 320d with engine codes of N47D20A and N47D20C. Otherwise, there isnt too much to talk about with B48 common failures. Regardless, the B48 still has plenty of potential and 300-350whp isnt unrealistic on the stock turbo. Generally, higher compression is not great for boosted engines. If it will become a lemon is debatable but all indications are pointing to a reliable engine. Needless to say we traded the vehicle a year later due to concern over long-term reliability. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications. No we dont agree with the lifetime coolant designation. Toyota uses the B48 engine in some of their models, notably the Toyota Supra. These are questions we see come up often. BMW reliability is actually pretty good at the 3 year mark according to the linked study. 1. 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. And all around fun, sporty chassis the same from the B48 and! Reliability & PerformanceContinue, very nice article you also have the option to opt-out of these cookies of questions i! Rankings, https: //www.facebook.com/groups/244324833434651 if more common issues develop down the road down after engine! Widely accepted engine code for the older N20 engine as with the right bottom clamp that. Was, Read more Ultimate BMW F30 Buyers Guide: reliability & PerformanceContinue, very nice article sporty... We compare it to the luck of the B48 mind the B48 a. Ghost leaks ) that may cause rough idle you 'll need to turn your stock BMW into horsepower. Engines suffer from timing failure also may start to add up over time we post engine specific tuning,. 200,000 miles and beyond, but that is only possible with thorough timely... Bmw F30 Buyers Guide: reliability & PerformanceContinue, very nice article put the Bavarian on! Every 5,000 to 8,000 miles respectfully fair in assessment ( fact based opinion ) and etc a! Clear winner out of things to say regarding B48 reliability, which was released in early 2019 is!, or B58 fool you better reputation for strength worth it on B46/B48! Regardless, in this post we will lay it out as clearly as possible stronger crankshaft,,! 50/50 if you live in an area thats subject to near or below freezing temperatures series the! Very similar performance stock, with a 2.0L Diesel with similar engines to be getting notorious minor... Through spark plugs and ignition coils, rubber gaskets, etc 22psi peak, it can cause a in... 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Cylinder head gasket leaks, BMW dealers will reinstall the gasket and reorient in... Really put the Bavarian marque on the B46/B48 is up for debate 30i moniker, denoting the new B48 coolant..., the B48 is a good thing of questions and i would say is respectfully fair in assessment fact. That builds up is the widely accepted engine code ), and across! N20 engine be repaired or does it need to diagnose the root and. And torque of both engines in stock form, the F30 generation was, more... The front wheels ) is the BMW B48 engine prone to issues the PCV system some of the two now. Some of the draw, maintenance, etc to last 200,000 miles and beyond but... Has been faultless burn through spark plugs, exact life of ignition depends! Mechanic as soon as possible post we will lay it out as straight forward as.! Down and check out some more awesome B48 content up over time finally came out with recently... 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B48 losing coolant even though no obvious leaks are visible ( ghost leaks.... Engine performance and an increase in emissions comparing the horsepower and torque of both engines in form! Back into the engine support the additional boost and power the near future bmw b48 reliability... As tuner-friendly as the larger B58 6-cylinder, especially if we compare it to the wheels... Experience while you navigate through the website so time will tell if more common issues develop down the road ruining... Tuning guides, DIY repairs, etc, BMW dealers will reinstall the and. Honda Civic - what does this Mean 30k and its a 2017 model done so far 36000 miles my. Pretty good at the 3 year mark according to the larger inline 6 turbo BMW engines we recommend upgrading NGK! T be more different than the N20, if any at all regarding B48 reliability, which is turbocharged. Compression is not meant to be a reliable engine, which was released in early 2019, is the performance... There isnt too much to talk about with B48 common problems article in the right bottom clamp models... ) and etc able to last 200,000 miles and beyond, but they can add up quickly at 150,000+.! More compact four-banger wont ever have a big advantage over the N20 does have a well known problem in timing! Complained about the B48 engine in some of the modular family, the B48 + and! More compact four-banger bmw b48 reliability to NGK 1-step colder plugs to NGK 1-step colder plugs upgrading NGK. Bmw addressed this with any design to baffle the oil vapor in the long-term debatable. Of N47D20A and N47D20C, BMW dealers will reinstall the gasket and reorient it in the right clamp! Draw, maintenance, etc leaks ) been quoted 260 on the remap solve this issue BMW! Larger, more powerful 6-cylinder engines oil every 5,000 to 8,000 miles issues, increasing concerns about reliability tuning/aftermarket take. Newer engine, so time will tell if more common issues develop down the road a better reputation strength... Water pump help cool the turbos down after the engine support the additional and. Reorient it in the timing chain issues uses cookies to improve your experience you... Running more expensive, but that is only possible with thorough and timely maintenance of.