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Drivetrain Malfunctioning error - injector problem in diagnosis and shuddering
I drive a 2011 X3 2011 28i xDrive ,
I am experiencing the Drivetrain Malfunctioning error on my iDrive, with the engine shuddering, problem arose some months ago in uphill driving and now is constantly there - I took it to a European local experienced shop which shows issue in Injection # 3 in diagnosis. He changed the Injector # 3 and the issue stayed the same. He swapped different injectors (1, 2, 4, 5, 6) to the position of injector # 3 and still saw the problem. He checked all connectivity from ECU to Injections and made sure its working.
He told me he is sure its the ECU problem and most likely a hardware wiring issue on the ECU box!, but I think its very unlikely. I am skeptic to Spark Plugs, Vanos Solenoid, Air Intake sensor, coil pack or PDM.
Any thought?
I am out of warrantee and do not want to go to dealership games and spend grands for this car!
Thank you!
Could you help me repair this?
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