2008 BMW 335xi Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2008 BMW 335xi

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2008 BMW 335xi Problems

Check Engine Light with Code P30FF and Rattle from Engine

Late model BMW 335xi turbo engines suffer from waste gate issues which become progressively worse with normal driving and especially with harsh driving conditions.

The turbocharger uses exhaust gas to create air pressure which is then forced into the engine. When there is no demand for power, the exhaust gases are released into the exhaust through a waste gate to prevent the turbo from speeding up.

“Waste gate rattle” or “Turbo rattle” is a result of excessive movement between the waste gate and the waste gate seat. This is a progressive issue with the following symptoms:

  • Rattling at cold start
  • Rattling upon deceleration
  • Loss of power
  • Check Engine Light Illumination
  • Manufacturer Specific OBD trouble code P30FF
  • Very poor engine performance and MPG

Adjustment of the waste gate actuator can solve the issue, but the issue will return. If adjustment does not correct the issue, the turbocharger waste gate must be rebuilt with new bushings, or the turbocharger must be replaced. BMW has replaced many turbocharger assemblies under warranty to correct this issue.

Outside Mirror May Fold Out To Far

One vehicles equipped with power folding mirrors, the mirror may fold out past the standard position. Our technicians tell us that if this occurs a special procedure must be followed to relearn the correct mirror home position.

Check Engine Light and/or Lack of Power

The Check Engine Light may illuminate and/or a lack of power may be noted due to a failed high pressure fuel pump. BMW has released a service bulletin regarding this matter, the suggested repair is to replace the failed high pressure pump.

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2008 BMW 335xi Questions

Loud exhaust on rt side when engine starts (1 answer)

When I start car, exhaust very loud and even while I sit idle, it rattles and has tin like sound when accelerating. It's seems to be getting worse. Checked muffler and fine. Seems to be coming from right side. Can't see any holes when a couple heat plates off. But it's so loud, it...

how do i improve my radio reception (2 answers)

Should I replace my run flat tires with regular performance tires? (1 answer)

Run flats give a harsh ride, cost 50% more than regular tires,and wear out quickly. Hitting a pot hole or bump results in an excessive jolt that can knock drinks out of the dash mounted cup holders. What effect,if any,will going to regular tires have on tire pressure monitors and handling charact...

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2008 BMW 335xi Recalls

Driver's Frontal Air Bag Inflator Ruptures And Sprays Metal Fragments

The driver's frontal air bag inflator may deploy the air bag with excessive pressure, resulting in the inflator rupturing and causing metal debris to be sprayed onto vehicle occupants. Dealers will replace the driver's frontal air bag free of charge to resolve the concern.

Side Air Bag and Safety Belt Tensioner May Not Deploy

An incorrect crimp connector may have been installed on the side air bag and belt tensioner wiring. There may be insufficient contact in the wiring, creating high resistance. This condition may cause the side air bag and/or safety belt tensioner not to deploy if needed in a crash, which increases the risk of injury. Dealers will repair the vehicles free of charge. The recall began September 16, 2009.

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2008 BMW 335xi Reviews

Rated
based on 5 customer reviews
Hopefully I am replying to the post in 2012 (and ones from 2019)about the noisy tires. Just bought Michelin MXV4 ZP (zero pressure) run flats from a local discount tire to me in indianapolis IN for 150 per tire. They are so quiet compared to the prior Turanza El42s I can't believe it.
Bought my 33xi used with 8,000 miles. The run flat tires are terrible - rough, jarring ride. Huge improvement when I switched to 18" BBS rims. Am worried I have a fuel pump issue
Great car. Well balanced. Good comfort. I an selling and purchasing a new Audi A4 after only 35,000 miles. TIRE NOISE. Dealer suggested 528xi at $50K to solve THEIR problem. Have loved BMW since 2004, 2002. Enjoyed the 335xi and am going crazy with tire noise which BMW does not care to address. Good buy? No.

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