Do independent garages fix this problem or is it best to go to a main dealer? Also what in your opinion is the worst case scenario in terms of cost. I have to weigh up what the car is worth against this cost given the age of the car.
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Worst case would be around £2000.
You need to use a main dealer or bmw specialist for this, a general garage can't resolve this.
BMW specialist has told me that they can take out the unit and have it reconditioned, total cost £300 to £400.
Does that sound a possible option?
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if they have diagnosed the proper failure, and can source a proper reconditioning shop, then yes.
you asked for worst case, and this is around £2000 as I stated.
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