BMW 135i Repair and Maintenance

A guide to problems, costs, maintenance and repair for your BMW 135i

BMW 135i Problems

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 with Code P30FF and Rattle from Engine

Late model BMW 135i 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.

Noise and/or Vibration Due to AC System Low on Refrigerant

A droning type noise may be noted when the air conditioning system is operating. Additionally, a vibration may be felt in the steering wheel. If these issues are no longer present when the AC system is turned off, the problem may be low refrigerant charge in the system. Our technicians remind us that if the refrigerant charge is found to be low, proper leak diagnoses should be performed in addition to recharging the AC system.

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BMW 135i Questions

How to reset my 2008 135i BMW (1 answer)

I Recently moved and stuffed the truck and back backseat of my BMW 135i full to capacity and my top wouldn't drop, I figured "oh my trunk is to full it will drop when I empty it" I make the move and emptied everything out of my car and drunk and still the top will not drop. after re...

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BMW 135i 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.

Engine Timing Bolts May Loosen And Break

The bolts that secure the housing for the variable camshaft timing adjustment unit can loosen over time and possibly break, causing engine damage and engine stalling. Dealers will replace the four bolts for both intake and exhaust timing units free of charge to resolve the concern.

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.

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BMW 135i Reviews

I purchased a used 2008 BMW 135i in September 2012. After two weeks, I started having trouble with the adaptive headlights and the dealer wanted $4000 to replace them. From all the research I have done, it appears a lot of other 135i owners have had similar issues with their headlights. Before I could have the headlights replaced, one of the turbos went out and the water pump stopped working...
The front portion of the car shakes when driving over bumps. Problems with the sway bar have been identified. Otherwise, a very fun car to drive. It is fast, fast, fast. Great on gas and the seats are not bad. The control panel is not user friendly, but the voice recognition makes up for that.

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