XBimmers | BMW X3 Forum - View Single Post - 04 X3 3.0i -Engine Stumble

MFox_Iowa · 11-21-2011, 02:53 PM

Hello All,

The vehicle has 92,000 mile and recently had air filter, NGK plugs, Transmission and Transfer case juice replaced. The spark plugs were replaced as there was
a stumble, (when cold, acceleration, or when warm) Not all the time, but enough to press the changing the plugs.

The bad news is that the stumble is still there, not maybe as much, but definitely the engine is not as smooth as it should be. My guess as there are no engine check light warnings, is that one or more of the coils are getting weak.

Is this the culprit? Obviously the dealer screams you need BMW coils, are any other after market, Bosch, BavAuto, coils equal? Any general comments on this issue will be greatly appreciated.

11-21-2011, 02:53 PM	#1
MFox_Iowa New Member 2 Rep 7 Posts Drives: '04 X3 Join Date: Nov 2011 Location: Eastern Iowa iTrader: (0)	04 X3 3.0i -Engine Stumble Hello All, The vehicle has 92,000 mile and recently had air filter, NGK plugs, Transmission and Transfer case juice replaced. The spark plugs were replaced as there was a stumble, (when cold, acceleration, or when warm) Not all the time, but enough to press the changing the plugs. The bad news is that the stumble is still there, not maybe as much, but definitely the engine is not as smooth as it should be. My guess as there are no engine check light warnings, is that one or more of the coils are getting weak. Is this the culprit? Obviously the dealer screams you need BMW coils, are any other after market, Bosch, BavAuto, coils equal? Any general comments on this issue will be greatly appreciated.
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