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 ProblemsCheck 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.
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.
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.
2008 BMW 335xi QuestionsLoud 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...
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...
2008 BMW 335xi RecallsDriver'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.
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.