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BMW have told us not to drive it with the light on...gone back to Garage today but not holding much hope...There has to be something wrong with it because when you put your foot on the gas it has no power then all of a sudden it goes.

HELP ..I have a BMW x3 2.0 diesel 2006, Since i have owned this x3 the engine management light has hardly been off, the day after buying it the light came on so back to the dealer it went they said it was a sensor and it had been done but then the next day back on came the light, I again rang the place i bought it from (Moorpark Prestige cars near Kidderminster) but they got shirty so i took it to a friends garage who put it on computer & it bought up codes saying it was the mass air flow sensor so that was changed then again next day after doing a certain millage on it came again so back to the garage it went & this time it was saying a few things which were 2 x heater plugs a vacuum valve & the EGR cleaned thinking its got to be sorted now but alas on it came on again, so this time it has had a new relay plug but yes youv guessed on the way back tonight on it has come again.. The only thing i can say is the light always comes on after doing pretty much the same amount of millage....PLEASE can any one help its driving me mad and costing me a fortune......Any comments they may help at all would be greatly received...Can anyone tell me if i took it to BMW whether they can pin point the address of problem ie: broken wire or can only tell me the codes the same as a garage can....THANK YOU, Caroline