Problematic BMW Engines with a Reputation for Breaking Down

BMW, a renowned car brand founded in Munich in 1916, has established itself as a leader in the automotive industry. With its impressive lineup of cars that combine luxury, advanced technology, and stylish design, BMW has become a symbol of success and status.

While BMW engines are generally known for their power, endurance, and quality, there have been instances where certain engine models have experienced notable problems. Some specific engine issues have been observed in the BMW 320d 2.0 Diesel, 520D 2.0 Diesel, and X5 330D 3.0 Diesel variants.

The BMW 320d 2.0 Diesel engines, particularly the N47D20A and N47D20C variants, have been prone to timing chain problems. These issues arise when the crankshaft sprockets damage the timing chain, leading to engine performance issues. The timing chain failure can eventually result in engine breakdown, necessitating either an engine replacement or costly repairs.

Similar timing chain problems have also affected the BMW 520d 2.0 Diesel engines, specifically the N47D20A and N47D20C variants. The crankshaft sprockets in these engines cause wear on the timing chain, potentially resulting in chain snapping or jumping, and subsequent engine damage.

The BMW X5 330D 3.0 Diesel engines, including the N57D30A, N57D30B, and N57D30C variants, have experienced more extensive problems compared to the previous engine models mentioned. In addition to timing chain issues, misalignment of the crankshaft sprockets can cause severe engine damage. When the timing chain breaks, it may jam other engine components, leading to costly repairs or even engine replacement.

Furthermore, some variants of the BMW X5 330D 3.0 Diesel engines have exhibited manufacturing defects in the crankshaft sprockets. This flaw causes damage to the timing chain and can result in chain failure or breakage, leading to significant engine damage.

Another issue affecting the BMW X5 330D 3.0 Diesel engines involves the spring installed in the turbo wastegate. Improper lubrication can cause the turbo to fail, impacting the functionality of the wastegate. Consequently, the turbo may be damaged, and the wastegate can become either fully or partially open, affecting engine performance.

It's worth noting that the BMW X5 330D 3.0 Diesel engines, specifically the M57D30 (306D3) and M57D30 (306D5) variants, have also been associated with turbo and injector failures. These problems often occur due to issues such as dirty or insufficient oil, resulting in reduced engine power and performance.

While these engine issues have been identified in specific BMW models, it is important to recognize that BMW continues to deliver elegance and durability with its vehicles. Addressing these engine problems will further enhance the overall reliability of BMW engines in the future.

IMI Certified Tuning Specialist

MPG Tuning Ltd
Unit 44 Rumerhill Business Estate
Cannock, Staffordshire, WS11 0ET

 Tel: 01543 466662


MPG Tuning Offer Professional ECU Remap and Tuning services including but not limited to ECU Remapping, EGR Delete, DPF Solutions, VAG Emissions Recall Scandal Rollback, Tricore Processor Programming, Boot Mode, and Traditional Chip Tuning.

MPG Tuning is based in Cannock Staffordshire but serves customers from further afield typically from the following areas, Lichfield, Burntwood, Rugeley, Stafford, Brownhills, Walsall, Wolverhampton, Birmingham, Tamworth plus many more areas throughout the West and East Midlands.

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I went for a remap on my T5 as it had an awful flat spot around 2800 rev's I got great personal service and its like having a new engine in the van smooth power and greater economy.... Highly recommended wish I'd done it months ago it would have paid for it self already thanks a lot hills are no longer a drag.

Adrian McManus

Popped in to see Mike on Friday to have my A4 2.0TDi 170hp remapped. Have to say I was a little pessimistic at first having being told by another firm that remaps on these were a nightmare so was expecting the worst! Thankfully, nothing of the sort, straight in, one error message unknown but Mike worked it out and all done in no time. Straight out for a test run and the drive is very different, certainly mid ranged (where these engines seem to suffer) pulls away nicely and can definitely feel the benefit. Best money I've ever spent on a car in, well, forever! Thanks again Mike

Mark Patterson

Had the ECU my 320D remapped by Mike yesterday. Very impressed with the results. Noticed it straight away after having it done. Service was also great, talked me through all of it to get exactly what I wanted out of it. Highly recommend mpg tuning.

James Aston

Took my Civic Mk VIII 2.2 CDTI to Mike following a recommendation from a friend who's had his last few cars remapped at MPG., professional service and answered any questions I had. Customised remap that gave me a good balance between performance and economy. Mike was happy to let me watch the whole procedure and explained what he was doing. Makes a good brew as well! Would highly recommend, Will definitely bring my future motors here.

Dan Wright

Just had the ECU on my BMW 320D remapped and it is absolutely superb the power is unbelievable and the service is outstanding would recommend it to anybody he has transformed my car from 160 bhp to 207 bhp no smoke at all and the power delivery is awesome throughout all of the gears really happy.

Tom Dawson

Had my Astra 1.9cdti remapped here with EGR delete for a great price, I have now got the full power and yes it's rapid lol.... Mike was helpful and talked me through it all and also good after care as well. Thanks again.

Scott Walker

Had my T5 remapped today. Over the moon with the results! Really reasonable price and customer service is second to none! Would highly recommend!

Ethan Tunnicliffe

I had my car remap done and I'm really pleased with MPG Tuning. Great atmosphere, great service and I will recommend it to all my friends. Thank you once again. Renault Megane 2.0 Turbo petrol with 165 hp standard

David Wojtasik

Took my Astra estate for a ecu remap, excellent job feels a lot more responsive!

Umair Khalid

Mike remapped my car. Perfect professional service from start to the end. For less than 2 hours everything was done. If you want a different feeling when you are driving MPG Tuning is your place to go.

Dimitar Dimitrov

My boyfriend has exactly the same car as me 1.5 diesel fiesta, had his remapped and was over the moon with it. I had never thought of having a car remap but after driving his, mine felt heavy and slow so decided to get mine done too, now I am converted I love it even more and I am getting about 80-90 miles per tank better than before, very happy , great friendly service and awesome cuppa while we waited

Kelly Williams

Had my renault van remapped at mpg tuning, awesome power, can now keep up with pigeons, thanks Mike for an excellent job 👍👍



Our lead technician has over 16 years’ experience in the tuning industry and long term connections with some of the Worlds most experienced data programming and tuning specialists. We are extremely passionate about our customer satisfaction and strive for a perfect result every time.

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