BMW Complaint - 2006 325i Valve cover bolts defective
BMW 2006 325i Valve cover bolts are defective
If you own a 2006 325i and your valve cover is leaking oil and causing your engine compartment to smoke you likely have defective valve cover bolts.
In 2006 BMW changed the composition of materials which include a magnesium cover secured by aluminum bolts. Aluminum bolts do not have the proper thermal properties required to withstand the torque, expansion and contraction required to properly secure the valve cover.
The aluminum bolts break and oil leaks onto the engine block causing the engine to smoke and lose pressure.
BMW is aware of the defect. BMW fixed it less than a year later by going back to the steel bolts in the 2007 models and greater.
Certified BMW mechanics are aware of the problem because it is a common factory DEFECT. Unfortunately this problem commonly occurs just out of warranty. It’s not a cheap fix and BMW won’t acknowledge the problem.
Personal experience: This is my third and final BMW. BMW does not care about customer loyalty. This is clearly a factory engineering defect.
If you are experiencing this problem you should contact:
BMW of North America, Inc. Corporate Office
300 Chestnut Ridge Rd.
Woodcliff Lake, NJ 07675
Toll free: 1-800-831-1117 (BMW Customer Service Center)