2009 BMW Z4 sDrive Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2009 BMW Z4 sDrive

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2009 BMW Z4 sDrive Problems

Check Engine Light with Code P30FF and Rattle from Engine

The BMW Z4 sDrive35i turbo engine suffers 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.

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2009 BMW Z4 sDrive Recalls

The Battery Cable Connection at the Fuse Block May Break

The vehicle battery is connected to the fuse box via a heavy duty cable. It has been determined that the cable connection at the fuse box can degrade over time, resulting in increased electrical resistance. This increased resistance can cause the connection point to overheat and break, resulting in a loss of electrical power and causing the engine to stall, increasing the risk of a crash. Dealers will replace the positive battery cable connector and secure it with an improved method to correct this concern.

The Seat Belt May Not Automatically Tighten in a Crash

A defective crimp connector can cause increased electrical resistance in the seat belt tensioner wiring. Increased resistance in the wiring could cause the belt tensioner not to deploy in the event of a crash. If the belt tensioner does not deploy in a crash, injury could result. The belt tensioner wiring will be repaired free of charge. The recall began September 5, 2009.

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