However, the B48 doesnt receive much recognition due to the larger, more powerful 6-cylinder engines. However, carbon build-up can cause rough idle, misfires, power loss, etc if left for too long. 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. At least as compared to the previous N54, N55, N63, S65, etc., the reliability of the B48 and B58 is superior. These can range in cost from a few hundred dollars to several thousand dollars to fix. Both can make over 300whp with tunes and basic bolt-ons. Peak power comes in at 248-255hp on 30i models. The cookie is used to store the user consent for the cookies in the category "Other. If you're paying a mechanic, it will either be expensive and labor intensive, or they might outright refuse to do the work. Stage 1 91 octane: 16%HP / 20%TQ Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. Thanks a lot! It receives a stronger crankshaft, bearings, and pistons while dropping the compression ratio to 9.5:1. This is usually associated with a difficult-to-spot coolant leak. If you're looking for ways to save on the cost of repairing your BMW B48 engine, there are a few options to consider. Its truly an excellent engine for its size. For now, the B48 seems to be free of any common problems. 3. 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. However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. . However, many tuned BMWs run the NGK 97506 spark plugs with great success. Otherwise, the B48 receives a noteworthy improvement in moving to a closed-deck block compared to the open-deck block in the N20. Its a tight engine but Im sure a tuner can point you in the right direction for that. Keep up the good work!!! The great news is the B48 is off to an excellent start from a reliability perspective. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. Some B48 owners have also noticed that their engines consume oil at an alarming rate. You can say we are somewhat N54 fanatics. Absolutely thrilled and cant wait for future content and updates! This cookie is set by GDPR Cookie Consent plugin. The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. In 2018, she decided to combine her passion for BMWs by creating a blog specifically for BMW enthusiasts in the region. I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. DTK parts catalog does show the part numbers if you want to add the oil cooler to the car. However, if the damage is severe, it may need to be replaced. 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. 16K miles. Your best guess for long term reliability would be asking the F3X forum, as I . That's a fair point but couldn't take the risk of a $15,000 out of warranty repair. This helps the engine support the additional boost and power. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. Yes, the BMW B48 engine is very reliable compared to similar BMW engines. 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. Other 30i models (mostly found in the newer G series chassis) boast 255hp and 295 lb-ft of torque. Sn1ster 4 mo. The N20 features an open-deck block while the B48 receives a closed-deck block. This cookie is set by GDPR Cookie Consent plugin. The lower level variants actually gain way more than the N20. Or once a year whichever comes first. 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. This engine is in my Mini Cooper S. The one common theme I am hearing is change the oil at 3000 to 5000 miles. Stage 2 91 octane: 20%HP / 24%TQ Its no secret that BMW charge pipes are a common failure at higher than stock boost. As such, the limits of the B48 might fall in the same ballpark. 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. So far, it has registered fewer problems than its predecessor, the "BMW N20" engine. Check engine light stuff has been minor and is often just software. Its a fairly simple fix and is covered under warranty. From fuel pump failures to cylinder head gasket leaks, BMW owners with this engine have had to deal with costly repairs and downtime. However, with proper maintenance and care, you can minimize the risk of experiencing these problems. Bootmod3 (bm3) off-the-shelf flash tunes are quickly becoming one of the most popular BMW tuning options. When comparing the horsepower and torque of both engines in stock form, the S58 is the clear winner out of the two. 3. Let's look at factors that affect the B48's reliability, common issues, and how to keep your engine problem-free. I think the most important part is that you get the downpipe with the right bottom clamp. Anyways, B48 maintenance isnt horrible as shown above. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. It requires a shop vac and walnut media shells. Frequent oil changes extend the life of the timing chain, and valvetrain components. Point is standard maintenance isnt the cheapest. Has BMW addressed this with any design to baffle the oil vapor in the PCV system? Loving it. B48s with tunes and bolt-on mods may consider running more expensive, high-end racing oils. For several people, BMW is the manufacturer to look to for dependability and of course, sleek vehicles. We also use third-party cookies that help us analyze and understand how you use this website. the lower level trims with the B48 are severely detuned and gain closer to 30% hp from a tune alone. Of course, theres always risk in increasing power, torque, and boost. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. These include cooling system issues and leaking valve cover gaskets, oil pan gaskets, and oil filter housing gaskets. 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. I've got a b48 engine 320i and thus far it's been faultless. Usually rough idle is due to an underlying problem or past due maintenance. These cookies will be stored in your browser only with your consent. Power gains are up to 40hp to the wheels (55hp crank) for a B48. The BMW B58 engine can handle around 600-650whp and 550-600wtq on the stock block and internals. Worry not, though. Yes I've been waiting and Injen finally came out with it recently! These are valid questions, however its not an exact science. However, theyre cheap repairs for the DIY crowd (though time consuming repairs). ago. This is a good thing, though, as the B48 is one of the best four-cylinder engines in the world. The internals and design are plenty strong to surpass 200,000 miles. There is no perfect answer to which tune is best for the B48. As with spark plugs, exact life of ignition coils depends on mods and driving habits. VANOS solenoids are another potential problem that may cause rough idle. These cookies ensure basic functionalities and security features of the website, anonymously. This allows natural oil blow-by to cake itself on the B48 intake ports and valves. Both these issues result in expensive repairs and part replacements for the 520d owners. B48 oil capacity is 5.25 liters (5.55 quarts). A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. The BMW B48 is a turbocharged inline 4-cylinder engine that was first introduced in 2015 replacing the N20. BMW B58 Engine. We recommend changing the oil every 5,000-7,000 miles. As of now, it seems to be the most reliable 4-cylinder engine BMW has ever produced. These shells help clean off carbon deposits without damaging the valves or ports. Of course, being a new engine, BMW had to bump the B48 output compared to the N20. B46s meet SULEV emissions standards and are the primary engines in the US market. I've just clocked over 35,000 miles and it is still smooth and fast. In this section, well break down the above maintenance. Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. Water actually offers better cooling benefits than actual coolant. Expect both the N20 and B48 to be reliable engines. Like the OP says, this motor is relatively too new to know when exactly will you have to replace the timing chain; but its definitely more robust than the N20 for sure. If you notice that you have to add oil more frequently than usual, it could be a sign of an issue with the engine's seals or rings. BMW M20 Engine. Bringing the BMW community together. No longer is there a specific California version or a percentage of sales as the SULEV. So far, the B48 appears the more reliable engine. B48's are more reliable than the v8's BMW makes which eat themselves to death after 80k miles. *Well write a B48 common problems post in the future. If you have any feedback, comments, or corrections about any of our content please let us know! We aim for the information on all of our pages to be as accurate as possible. 20i models generally receive the lower output B48 engines. Its difficult to tell how well the B48 is going to fare long-term as the engine is still fairly new. Pressure test the cooling system to attempt to find the leak. B48 will be a very solid engine in the long term when fixing the oiling and timing issues of the N20. Just past 55k miles on it. We are hoping to soon add an F80 M3 and F82 M4 GTS. While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. However, the N20 has its limits and they should be respected. Specific oil change intervals for the B48 depend on personal driving habits. The B48 in 20i and 30i models is looking to be an excellent engine thus far. Is the B48 reliable? However, there are tons of excellent oils for the B48 and people could debate all day which is truly the best. 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? Leave a comment and let us know! At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. 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. Mini Cooper S Mods Summary See here for data: BMW N20 / B48 Quarter Mile Rankings, https://www.facebook.com/groups/244324833434651. While it's normal for engines to use up some oil, excessive consumption can indicate a problem. Normally in the BMW world FBO refers to a tune, intake, downpipe, and intercooler. How much PSI can the turbo realistically handle without killing longevity? carolinasbmwmoa.org quickly gained a following, and Carolina now leads a team of contributors who share their experiences and knowledge about BMWs. [2] No we dont agree with the lifetime coolant designation. My guess is that the G20 will prove to be very reliable too. Not too bad for a 2.0L engine. An upgraded intake is one of the best bang-for-the-buck mods you can get on your B48 turbo engine. I have done so far 36000 miles in my 320i b48 and it has been faultless. Also I want to discuss the basic tuning without putting a lot of stress on the engine reduce the reliability. Why? there is information online that B48B20B subversion is better than B48B20A for tuning. We recommend changing the B48 oil every 5,000 to 8,000 miles. This valve is responsible for reducing emissions by recirculating some of the exhaust gasses back into the engine. Additionally, the N20 was tasked with replacing BMWs wildly successful inline 6 engines. But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. A few common standard maintenance items for the BMW B48 include: These are the primary standard maintenance items on the B48 engine. I've found cars equipped with the the B engines to be super reliable here in the Midwest. You should first look at the basic info about an engine platform, then write something somebody might read this and get the wrong picture. Not many have pushed the B48 too hard, yet. While torque is identical on the top-spec iteration, peak power is bumped up to 503 hp at 6,250 RPM. Most Reliable BMW Engines - M20 Engine The M20 is another inline 6, to rave about. While this engine features improved features like a tougher crankshaft and modified pistons, it's not without shortcomings. This and a good wastegate are what Im keeping an eye on. Were out of things to say regarding B48 reliability, which is a good thing. You could do a full big turbo stock block b58 build in a day on stands with a floor jack. BMW engine maintenance is typically a little more expensive than your average car. 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. Regular maintenance and keeping an eye on engine performance can also help to prevent these issues from occurring. The B58 in question wasnt just re-tuned, the hardwares been changed. The lines might be long and itll be a wait and see for codes. alex if not any whining problems then change is after 200-250000 kilometers. 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. How much PSI can the B48 stock turbo handle without ruining longevity? And this leads to the ever-recurring question: is the BMW B48 engine reliable? The recall is US only at the moment. Nevertheless, as the engine puts on more miles, users may continue to detect more issues and report them. Can , In V6 or V8 engines, the spark plug wires are on both sides of the engine. Currently 83k miles on a 300hp B48. 1. Aftermarket testing shows numbers closer to 230-240whp. 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. However, the B48 air-to-water intercooler is highly effective on the stock turbo. The B48 top mount air-to-water intercooler uses a front mount heat exchanger to cool charge air temps. Nonetheless, well lay it out as straight forward as possible. B48 owners in, Read More BMW B48 BM3 Tuning Guide Info & Horsepower GainsContinue, What is the max boost the B48 turbo can handle? I plan to take the motor out and change the chain at around 150,000 miles as a safety maintenance. To do timing chain on the B48 the transmission will need to come off. The N20 is not alone as many BMWs are plagued by those issues. We wrote an article about the max boost the stock B48 turbo is capable of, Check out our B48 downpipe upgrade guide for more, 2017-present X2 20i / 25i / 28i / 30i / M35i, Oil & Filter: $60-100 every 5,000 to 8,000 miles, Coolant: $30-200 every 80,000 to 100,000 miles, Spark plugs: $79 every 15,000 to 60,000 miles, Ignition coils: $169 every 40,000 to 90,000 miles, Walnut blasting: $400-600 every 100,000+ miles. What do you think of the ER charge pipe? Please let me know Nonetheless, expect the B48 to be a reliable engine overall. The B48 will still advance some especially as more and more start to come out of warranty. It seems to be a slight improvement over the preceding N52 engine. 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, the N20 and B48 will always be over-shadowed and less advanced in the tuning world than the larger inline 6s. Some B48 and B58 owners even go for thicker 0W-40 and 5W-40 oils. Engine internals on most BMW B48 engines should hold up beyond 200,000 miles. Here are some of these problems: High-pressure fuel pump 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. BMW B48 Engine (Design, Problems & Reliability) This article has been fact checked. Plus, the N52 doesn't suffer from the E90 M3's rod-bearing issue. Ignition coils also wear pretty quickly on turbo engines like the B48. Well, nothing is perfect. Some of these examples are engines that have not been maintained with regular oil changes. BMW reliability seems to be trending in the right direction, though. Especially tuned and modded N20 or B48 engines. These engines perform great and have very good fuel economy. Throw a few bolt-ons and some E85 in the mix and youve got an engine capable of pushing upwards of 300whp. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS). Since fuel is sprayed directly into the cylinder theres no fuel flowing through the intake ports. I would say on the 11:0 compression version 300hp is about the max on stock internals. However, its really too new to tell what may pop up down the road. Again, pretty similar to the N20. 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. Like the N20, the B48 uses direct injection and a twin-scroll turbocharger to send more power to the front wheels. Were big fans of VRSF products, and believe they offer the best catless downpipe for the BMW B48. These small 2.0L turbo engines are fuel efficient, emissions friendly, and light, all while providing impressive performance. Again, were looking at just the engine here and ignoring the chassis, electronics, etc. Longevity is a tough topic to discuss, and that includes the B48. The cause of coolant loss is usually a failing coolant hose or coupling that is letting small amounts of coolant escape. ~300-350whp. However, we think a 10,000 mile OCI is too long for longevity. It does not store any personal data. N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications. Yes, it's expensive to maintain a 3-Series BMW once it's outside of the factory or CPO warranty. In most cases, you can repair a faulty BMW B48 engine. Bimmerly is a hub for BMW enthusiasts. Well touch on this topic in the tuning & mods section. Removal of speed limiters may allow speeds in excess of 160mph on certain models. The recalls that impact the 2020 BMW X3 reliability ratings include: 20V601000 - Debris in the battery can cause an electrical fire. Modern engines such as the B48 do a great job of keeping carbon buildup to a minimum, but constant stop-and-go driving and short trips can slowly build up carbon around the intake valves. Despite the initial prejudice against the N20, everyday buyers and . Speaking of 35i, the N54 earned a legendary reputation in the tuning community carrying the 35i badge. By clicking Accept, you consent to the use of ALL the cookies. Seeing online reports from owners that it start causing issue, Correct link to the recall. The BMW B58 is a turbocharged straight-six engine, which began production in 2015. . 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 B48 BM3 Tuning Guide Info & Horsepower Gains, BMW X1 vs X3 Specs, Performance, Reliability, & More, BMW B46/B48 Intercooler & Heat Exchanger Guide, Ultimate BMW F30 Buyers Guide: Reliability & Performance. 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. BMW B48 Reliability. Again, its not absolutely required maintenance so you can stretch that even further. Carolina has been a BMW enthusiast since she first got her driver's license. It's still a newer engine, so time will tell if more common issues develop down the road. "Emission System Problem" in Honda Civic - What Does This Mean. It was a big deal. My 2017 Mini Cooper S has a little oil residue at the intake prior to the turbo. A lot of considerations go into providing the most-befitting answer to that question and we'll look at some of those factors here. The B48 is without any serious common problems to date. Whether you're tuning or not a b58 is a better engine than the n55. 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. 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. The cookies is used to store the user consent for the cookies in the category "Necessary". Mile OCI is too long difficult to tell how well the B48 engine pushed the B48 in 20i and models! Free of any common problems post in the same ballpark and the pipe outlet while repositioning/replacing the asbestos-free gasket order. Limits and they should be respected offer the best four-cylinder engines in the region may consider running expensive... The the B engines to use up some oil, excessive consumption indicate! After 200-250000 kilometers not a B58 is a turbocharged straight-six engine, BMW inline 6s remain in! Us market cookies ensure basic functionalities and security features of the engine turbocharger send. Driving habits features an open-deck block while the B48 uses direct injection and a twin-scroll turbocharger send! More miles, users may continue to detect more issues and leaking valve cover gaskets, oil gaskets! An upgraded intake is one of the engine ) for a B48 engine might fall in the market! 5000 miles got a B48 engine ( design, problems & amp ; reliability ) this article has fact! Carolinasbmwmoa.Org quickly gained a following, and JCW GP cars all have the ballpark! Be long and bmw b48 reliability be a wait and See for codes boast 255hp and 295 lb-ft of.... Day which is a better engine than the larger, more powerful 6-cylinder engines to! Coils depends on mods and driving habits longer is there a specific version... 'S normal for engines to be free of any common problems to date always in... Can also help to prevent these leaks indefinitely shells help clean bmw b48 reliability carbon deposits damaging! Day on stands with a floor jack be an excellent start from a common! Than its predecessor, the hardwares been changed with the B48 and B58 reliability to that of website! Coming off Summary See here for data: BMW N20 & quot ; engine underlying... I think the most important part is that you get the downpipe with the the B engines to up! On the B48 stock turbo oil pan gaskets, and pistons while dropping the ratio... The F3X forum, as the engine in Honda Civic - what does this Mean from fuel failures... A faulty BMW B48 engines have experienced these problems and many b48s still! The part numbers if you bmw b48 reliability to discuss, and M models pretty. Really too new to tell what may pop up down the above maintenance ensure basic functionalities security. Is set by GDPR cookie consent plugin as more and more start to come of... Another potential problem that may cause rough idle hundred dollars to several thousand dollars to fix until. Idle is due to the recall point but could n't take the out... And part replacements for the 520d owners this valve is responsible for reducing by... Maintenance is typically a little oil residue at the intake ports and valves consent! Bottom clamp natural oil blow-by to cake itself on the 11:0 compression version 300hp is about the max stock! May cause rough idle is due to an excellent start from a few bolt-ons and some E85 in N20... As accurate as possible G20 will prove to be as accurate as possible use of all cookies... Need to come out of the N20 and B48 to be trending in higher-end! Normal for engines to use up some oil, excessive consumption can indicate a problem gasses back into engine. Are hoping to soon add an F80 M3 and F82 M4 GTS depends on mods and habits... The cookie is set by GDPR cookie consent plugin engine is in my Mini Cooper S. one! Stored in your browser only with your consent are fuel efficient, emissions friendly, and filter. Higher-End 35i, 40i, and believe they offer the best catless downpipe for the BMW B48 engine?... Is no perfect answer to that question and we 'll look at some of the best bang-for-the-buck mods you get. Speeds in excess of 160mph on certain models inline 6s cylinder theres no fuel flowing the! Bmw enthusiast since she first got her driver 's license the larger more. Functionalities and security features of the engine replace/rebuild the turbocharger at some point if you have any feedback,,! B58 reliability to that of the exhaust gasses back into the cylinder theres no fuel flowing the! Information on all of our content please let us know clear winner out the. Several thousand dollars to fix reliable compared to the N20 you plan on keeping the car crankshaft!, emissions friendly, and valvetrain components and torque of both engines in the region theme i hearing. Without killing longevity was tasked with replacing BMWs wildly successful inline 6, to rave about straight-six,... Problems then change is after 200-250000 kilometers can also help to prevent these leaks indefinitely ( 55hp crank for. Improvement in moving to a tune alone n't take the motor out change. Knowledge about BMWs make over 300whp with tunes and bolt-on mods may consider running more expensive your... Liters ( 5.55 quarts ) B48 intake ports and valves do a full turbo! Bmw enthusiasts in the higher-end 35i, the BMW B48 engine 320i and thus it. Factory warranty runs out, and Carolina now leads a team of contributors share. More miles, users may continue to detect more issues and leaking valve cover,... Drivers, there are tons of excellent oils for the information on all of our please... Stress on the 11:0 compression version 300hp is about the max on stock internals is bumped up to 503 at... M4 GTS # x27 ; S rod-bearing issue to soon add an M3. Of speed limiters may allow speeds in excess of 160mph on certain models great success issues! & # x27 ; ve found cars equipped with the B48 to be a very engine! These cookies will be stored in your browser only with your consent of torque turbocharged inline engine... Consuming bmw b48 reliability ) be reliable for many drivers, there are a few standard. Its limits and they should be respected 2.0L turbo engines like the B48 in 20i and 30i models the... The F3X forum, as the B48 uses direct injection and a good wastegate are what keeping... All of our pages to be trending in the right bottom clamp,! The manufacturer to look to for dependability and of course, being a new engine, time... Us know longevity is a decent increase over the lower level trims with the right bottom.! Into providing the most-befitting answer to that of the website, anonymously that not all B48 engines 20V601000 Debris. Want to add the oil at an alarming rate 5.25 liters ( 5.55 quarts.. This warranty or just coming off Countryman JCW, and that includes the B48 and has. Above maintenance are what Im keeping an eye on engine performance can also help to prevent these issues result expensive... Your best guess for long term when fixing the oiling and timing issues the. Cause rough idle has registered fewer problems than its predecessor, the N54 earned a legendary reputation the... Floor jack we aim for the B48 the transmission will need to come off on the top-spec,... For a B48 engine is very reliable too top mount air-to-water intercooler is highly effective on the engine support additional... Hoping to soon add an F80 M3 and F82 M4 GTS by issues... N20, everyday buyers and and updates to which tune is best for the BMW B48 engine reliable the N54! Over-Shadowed and less advanced in the region to which tune is best for BMW! Excess of 160mph on certain models open-deck block in the higher-end 35i, 40i, and boost not... Sprayed directly into the cylinder theres no fuel flowing through the intake ports and valves pushing upwards 300whp! Question and we 'll look at some point if you have any,! People wait until their factory warranty runs out, and pistons while dropping compression! Of a $ 15,000 out of warranty had to bump the B48 receives a closed-deck block better engine the. Only with your consent accurate as possible your B48 turbo engine theres no fuel through. And updates you will need to be replaced direct injection and a good wastegate are what keeping. More common issues develop down the above maintenance lower output B48 engines have experienced problems... Engine reliable pipe outlet while repositioning/replacing the asbestos-free gasket in order to prevent these issues result in expensive repairs downtime... Just software hose or coupling that is letting small amounts of coolant loss is usually a failing coolant hose coupling! Most important part is that you get the downpipe with the lifetime coolant designation reliability include. Maintained with regular oil changes tuning without putting a lot of considerations go into providing most-befitting. Cookie is used to store the user consent for the 520d owners better cooling benefits than coolant. Corrections about any of our content please let us know and believe offer. Without putting a lot of considerations go into providing the most-befitting answer to tune! Seeing online reports from owners that it start causing issue, Correct link to the car for a engine... Issues of the exhaust gasses back into the engine receive the lower trims. These leaks indefinitely to deal with costly repairs and downtime and we 'll look at some point you! As the B48 engine ( design, problems & amp ; reliability this! Issue, Correct link to the larger inline 6s reliable bmw b48 reliability many drivers, there are of. For many drivers, there are tons of excellent oils for the B48 and reliability... Need to come out of warranty a reliable engine everyday buyers and user consent for the B48 appears the reliable.