Some common problems with this engine include oil leaks, cylinder head gasket failures, and faulty fuel pumps. It's still a newer engine, so time will tell if more common issues develop down the road. Basically, coolant circulates through the heat exchanger for cooling and then runs into the top mount IC to cool the charge air. Design [ edit] Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction". 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. Is the BMW 2.0 turbo engine reliability? Most 30i models come in at 252-258 horsepower. So far, it has registered fewer problems than its predecessor, the "BMW N20" engine. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS). 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. A tune and bolt-ons will likely push B48 powered BMWs into the 165-175mph ballpark. An upgraded intake is one of the best bang-for-the-buck mods you can get on your B48 turbo engine. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Our site is dedicated to all things BMW Tuning related. Additionally, the cost of labor and parts will also play a role in the overall repair cost. A few common standard maintenance items for the BMW B48 include: These are the primary standard maintenance items on the B48 engine. When comparing the horsepower and torque of both engines in stock form, the S58 is the clear winner out of the two. We always recommend an upgraded intake as the first mod to make on the, Read More BMW B48 Upgraded Intake GuideContinue, This is a question that comes up often. Turbo engines love to burn through spark plugs. Like any engine, the BMW B48 engine can experience issues. Im hearing a electronic beep when I start up my b48 430i. Whether or not these upgrades are worth it on the B46/B48 is up for debate. While , And despite their simplicity, a cold air intake actually provides a decent horsepower boost for a small investment. The cookies is used to store the user consent for the cookies in the category "Necessary". It does not store any personal data. Regardless, the B48 still has plenty of potential and 300-350whp isnt unrealistic on the stock turbo. That is not to say either engine is unreliable. ago. I don't think the X5s can come with a 4 cylinder? Here are some tips for maintaining your BMW B48 engine to keep it running smoothly: The cost of repairing a BMW B48 engine can vary greatly depending on the specific issue you're facing. It seems to be a slight improvement over the preceding N52 engine. B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp Have any issues diagnosed by a professional mechanic as soon as possible to avoid further damage to the engine. Somebody knows? To fix this issue, you'll need to diagnose the root cause and replace the faulty component. pretty cost prohibitive though. Specific oil change intervals for the B48 depend on personal driving habits. Installed bootmod3 stage 1 93 on it this weekend. 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. Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. Although this engine isn't perfect, because it's not turbocharged, it avoids the contemporary N54 engine's problems. Turbo BMW engines like the B48 burn through spark plugs and ignition coils fairly fast. Engine limits are always a tough topic. It offers an excellent balance of price, quality, fitment, and performance. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. B48/46 is not basically the same engine. The 330e has the B48B20B and the 530e has the B48B20A. 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. Based on the B58. the lower level trims with the B48 are severely detuned and gain closer to 30% hp from a tune alone. As you can see, the B58 has a very similar boost curve, but makes around 4PSI more than the N55 across virtually the whole rev range. The reference to the B58 is in regards to engine strength with their closed deck blocks. Both the N20 and B48 pack small 2.0L turbo engines that produce impressive power for their size. The former powers the standard M cars, while the latter makes its way onto the M Competition models. Stage 2 E30 octane: up to 22% HP / 30% TQ. Carolina has been a BMW enthusiast since she first got her driver's license. These small 2.0L turbo engines are fuel efficient, emissions friendly, and light, all while providing impressive performance. The B48 has a considerably higher horsepower output but both engines have identical peak torque figures. BMW B48 Engine Reliability Common Issues and Price to Fix Them, KIA Sportage Hidden Features - Making Your SUV Even Smarter. ~325-350wtq. BMW B58 Engine. These cookies ensure basic functionalities and security features of the website, anonymously. Two of our N54s are nearing 120,000 miles on original VANOS components. Theyre valid questions, however there is no perfect answer. I think the most important part is that you get the downpipe with the right bottom clamp. This issue can lead to reduced fuel efficiency and potentially damage the engine if not addressed. Thats it. Again, were looking at just the engine here and ignoring the chassis, electronics, etc. B48 oil capacity is 5.25 liters (5.55 quarts). Join for Ratings and Reviews. The N20 never earned a great reputation for strength. You hear it on a cold start and then when it reaches normal temperature. Additionally, more frequent oil changes are always a good idea. This ensures a precise, strong fit. Time will tell what may arise in the future. 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. They did tweak the design a little bit, but its still a testament to the reliability of the B48. A concerning common problem is the N20 timing chain. It has the same basic construction as the 6-cylinder B58, but with two less cylinders. (N20 engine code), and go for something post 2016 with a 30i moniker, denoting the new B48 engine being used. B46s meet SULEV emissions standards and are the primary engines in the US market. Yes, the B48 is a reliable engine that doesn't have major failure points, but still requires maintenance and attention in some spots. However, its really too new to tell what may pop up down the road. There is basically nothing that's carried over from N20 and the first time BMW has put out a fully closed deck design. It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. These are valid questions, however its not an exact science. If youre over 100,000 miles on your B48-powered BMW, a walnut blast is recommended. We expect the B48 will out-perform the N20 with further tuning developments in the future. Its also not overly expensive, especially for those willing to DIY some maintenance. Sir, thats an amazing article. We review the N55's performance and reliability. 2019-present F40 M135i xDrive These engines perform great and have very good fuel economy. Another representative of the modular family, the BMW B48 engine comes in the shape of a more compact four-banger. T. TheNine90 192 Replies. Generally, higher compression is not great for boosted engines. In most cases, you can repair a faulty BMW B48 engine. Despite the initial prejudice against the N20, everyday buyers and . However, as more start running full bolt-ons, E85, and methanol injection we might start to see more 325+whp B48s. The B47 has proven to be reliable so far in my mothers 320d. BMW N20 Engine Reliability, Known Issues, and More. Weve seen dynos showing nearly 400whp. Again, the same concepts apply with the HP discussion above. BMWs B48 engine is also the successor to the 2.0L turbo N20 engine. We wish we had more technical data to share. However, for now, expect the B48 to produce nearly 300whp with a tune and bolt-ons. Full Forum Listing. Additionally, responsible for delivering the impressive power, the upgraded 302hp B48 receives a larger turbo. Other 30i models (mostly found in the newer G series chassis) boast 255hp and 295 lb-ft of torque. This article and page is such a joy to read. There's a coolant line that goes from the expansion tank to the front of the intake side of the head that like to break off at the head. The BMW B58 engine can handle around 600-650whp and 550-600wtq on the stock block and internals. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. 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. Nowack (SAE SN) test a bit lower with higher viscosity oil. Theyre quality oils for a reasonable price. Expect the following B48 maintenance costs: Costs can add up a little more if youre having all BMW B48 maintenance done at the dealer or a repair shop. B48 will be a very solid engine in the long term when fixing the oiling and timing issues of the N20. However, it appears that BMW reliability is going in the correct direction. Is a brake light and running light the same? As with most 3 series, the F30 is a great success and all around fun, sporty chassis. However, some B48 engines have experienced issues with the tensioner, which can cause the chain to become loose and lead to engine damage. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. Anyways, in our opinion, you cant go wrong with the N20 or B48 if youre looking for a light, fuel efficient BMW engine that still packs a strong punch. BMW also recommends replacing the O-Ring, and the pipe outlet while repositioning/replacing the asbestos-free gasket in order to prevent these leaks indefinitely. Its difficult to tell how well the B48 is going to fare long-term as the engine is still fairly new. Do your thorough research and weigh the potential pros and cons before making a decision, if you are still trying to decide on engines. 1. Torque ranges from 214 to 332 lb-ft. Of course, all power variants of the B48 respond well to tuning and bolt-on mods. BMW engine maintenance is typically a little more expensive than your average car. A faulty ignition coil or a clogged fuel filter can cause this issue. Yes I've been waiting and Injen finally came out with it recently! A tune-only can bring spark plug life down to about 30,000 miles. A tune and bolt-ons push the N20 to 300+whp. Tons of tunes are around, and the best one usually comes down to personal preference and goals. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. Subscribe for updates! Producing 302 horsepower, the 35i variant receives a plethora of internal upgrades alongside a larger turbo. It's not that expensive and will require a tow given the size of the leak when it breaks. This issue is caused by an incorrectly assembled asbestos-free gasket. Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. Already a solid improvement over the 3.0L naturally aspirated N52 engine. Explore Our Forums. I am considering a oil catch can (not sure where I will find room to place it). Regardless, in this post we will lay it out as clearly as possible. B48s with tunes and bolt-on mods may consider running more expensive, high-end racing oils. 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. But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. Theyre valid questions, however there is no perfect answer. Content on bimmerfest.com is generated by its users. "Emission System Problem" in Honda Civic - What Does This Mean. In this section, well break down the above maintenance. Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. However, the B48 doesnt receive much recognition due to the larger, more powerful 6-cylinder engines. your BM3 estimated gain chart is incorrect, that is for the 35i B48 model that is already currently upgraded (tuned) to 302 hp. Leave a comment and let us know! An upgraded version producing 302hp is found in new 35i models. The NGK 97506 spark plugs are OE for the older N20 engine. Overall, expect the BMW N20 to be a reliable engine. These can range in cost from a few hundred dollars to several thousand dollars to fix. The recall is US only at the moment. We are hoping to soon add an F80 M3 and F82 M4 GTS. Yes, it's expensive to maintain a 3-Series BMW once it's outside of the factory or CPO warranty. I have a 2017 440i with the B58, and my girlfriend's mom has a 2018 X1 with the B48. However, the valve cover gasket, and the oil pan gasket will likely start leaking closer to 200,000 miles. I would say on the 11:0 compression version 300hp is about the max on stock internals. Again, even Toyota is using the B58 3.0L turbo engine in their newest Supra models. However, we think a 10,000 mile OCI is too long for longevity. However, the N20 has its limits and they should be respected. Frequent oil changes extend the life of the timing chain, and valvetrain components. That's a fair point but couldn't take the risk of a $15,000 out of warranty repair. A catless downpipe on the B48 will offer about 15-25whp gains. Ultimately, the BMW B48 engine may not be perfect, but it is still a reliable and powerful option for those in the market for a BMW vehicle. It couldn't be more different than the N20. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It was a big deal. Especially tuned and modded N20 or B48 engines. The great news is the B48 is off to an excellent start from a reliability perspective. BMW B48 Engine (Design, Problems & Reliability) This article has been fact checked. . Previous Thread | Next Thread Posting Rules You may not post new threads The B48 in 20i and 30i models is looking to be an excellent engine thus far. We also use third-party cookies that help us analyze and understand how you use this website. It is a rather serious issue as its a costly repair, and may cause severe engine damage in rare cases. Gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher. Great read. Not too many N20 owners are truly pushing the limits. Your email address will not be published. Nonetheless, the N20 offers impressive performance despite its small size. Yes, the BMW B48 engine is very reliable compared to similar BMW engines. Bimmerly is a hub for BMW enthusiasts. 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 the following B48 spark plug replacement intervals: Some of this also depends on your driving habits. No issues at all, starting to feel a little stutter when driving at a constant speed with a cold engine.. could be some deposit on the intake valves since this is direct injection. 3. The only thing they have in common is that they are both 2L turbos. However, B48 powered 35i models see a serious upgrade. Its a little confusing since BMW refers to this turbo design as TwinPower Turbo. A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. I've got a b48 engine 320i and thus far it's been faultless. The B58 is a marginally larger engine displacing 2,998cc compared to the N55s 2,979cc and weighs 18 lbs more, but while making notably more power. Mini Cooper S Mods Summary Bringing the BMW community together. Loving it. The B48 225kW engine has a stronger crankshaft, bigger main bearings, and new pistons providing a reduced compression ratio of 9.5:1 allowing higher boost levels and also sports a new intake tract design. Nearly every single BMW model line houses the B48 engine and it wears many different hats. The walnut blasting is mostly labor as quoted above; its nearly free if you can DIY the job. Removal of speed limiters may allow speeds in excess of 160mph on certain models. Bore x Stroke: 82.0mm (3.23) x 94.6mm (3.72). It will, however, add a lot of stress to the turbo and engine. This helps the engine support the additional boost and power. Well touch on this topic in the tuning & mods section. Thats about it. Unfortunately, the N20 isnt as stout. A fairly common issue on early-production BMW B48s issue is a turbo return line leak. From the factory, they produce similar power numbers to the crank and wheels. Both these issues result in expensive repairs and part replacements for the 520d owners. As such, the limits of the B48 might fall in the same ballpark. The B48 will still advance some especially as more and more start to come out of warranty. Many owners complained about the B48 losing coolant even though no obvious leaks are visible (ghost leaks). 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. No issues with my 2018 B46. B58 Engine Limits Simple Answer. The recalls that impact the 2020 BMW X3 reliability ratings include: 20V601000 - Debris in the battery can cause an electrical fire. It will run at 22+ PSI, however we believe the safe limit will be around 18-19psi. BMW updated the timing chain design in January 2015, which appears to mitigate the likelihood of timing chain issues. This mostly applies to N20s produced prior to 2015. That said, were likely writing this article too soon. Well, nothing is perfect. Like any engine, the BMW B48 can develop issues if not properly cared for. Can , In V6 or V8 engines, the spark plug wires are on both sides of the engine. didnt know injen make intake for B46? While the N47 in the xDrive18d and xDrive20d made 143 and 184, the new B47 provides 150 and 190 bhp. As far as weights, 0W-20, 0W-30, 5W-20, and 5W-30 all work well on the B48. If left unchecked, the engine could run low on coolant. Or once a year whichever comes first. BMW does consider B48 engine coolant to be a lifetime fluid. Bmw 2.0 Turbo Engine Reliability. Ultimately, anything LL01 and above will work well on the B48 engine. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. This valve is responsible for reducing emissions by recirculating some of the exhaust gasses back into the engine. BMW recommends running LL-14 or LL-17 oils on the BMW B48 engine. Anyways, walnut blasting is the process of blasting walnut media shells into the intake ports. Otherwise, the B48 receives a noteworthy improvement in moving to a closed-deck block compared to the open-deck block in the N20. It is a well maintained one at 130k miles. As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. *This article is in reference to the B48 engine itself. 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. Dmitry has been an editor and author at Cararac.com since 2015. If it will become a lemon is debatable but all indications are pointing to a reliable engine. One of the most common reliability concerns with the B48 is coolant loss. Quality LL01 or LL14+ oils can also be more expensive than your average engine oil. Yes, the B48 is a reliable engine, especially if we compare it to the N20 which had major timing chain issues. The engine is being included in the also new bmw x1. Indeed, the BMW B48 engine has its fair share of issues. The 302 horsepower B48 uses a stronger crank, bearings, and pistons with a lower compression ratio. You may also notice your engine misfiring. BMW reliability is actually pretty good at the 3 year mark according to the linked study. B48/46 is not basically the same engine.
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