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Car emitting Blue Smoke and has Faulty ABS Sensor - Dealer Not Helpful

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I bought this car from a dealer in January (almost two months ago) and noticed the car emitting blue smoke from exhaust and later on from dashboard. I can only use the car on weekends therefore it took me so much time to notice this issue. The ABS sensor for one of the tyres also started malfunctioning within the first month (almost 300 miles) and the dealer had changed one of the ABS sensors before I bought the car so it could be the same tyre's sensor going faulty.


I took the car to Halfords via my warranty provider who so far only confirmed the ABS sensor fault (it had taken me 5mins to find this out using my code reader) and need more time (and money of course) to find out what exactly is causing the blue smoke however they might strip off the engine.


I had contacted my dealer almost 4 weeks (driving the car for the 5th or 6th time) after the purchase date and clarified my intention about the refund however he encouraged me to take the warranty route first but obviously after finding out what the faults are I wouldn't like to own this car any more.


So far I have driven the car almost 500 miles, could anyone please advise if it is still reasonable to reject the car or shall I only insist on repair?

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Blue smoke is a clear indication that the turbo is on his way out 90% of the times.

Abs sensor light is not related to the blue smoke.

As it was replaced recently I am inclined to think that it's not been fitted correctly and it's not reading the wheel speed correctly, or it could be one of the other sensors.

A scan will tell which sensor is malfunctioning.

What car is it?

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how much are we talking about if I have to change the turbo? Do you think I better insist on a refund as other problems might also arise down the line as a result of this fault?


It is a BMW 3 series E90 petrol. It is the rear right abs sensor which is faulty. The warning light is not on all the times, it only comes on when I cross 50mph and the car starts jerking after 5-6 miles and after some time doesn't allow me to speed up until all the abs related lights are fully on.

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BMW turbos are well known for having problems, (German engineering I'm afraid).


The blue smoke could also be engine wear, ie, piston rings or valve stem oil seals, so a fuller description of when the blue smoke appears is needed.


Before you condemn the abs sensor that was fitted, you should check them all out as it could be as King says above, one of the others, but compared to the blue smoke, this is a minor problem.



You should do this with all haste as you are fast running out of time to reject.

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I agree, turbos don't come cheap these days and it could be linked to other problems as Conniff described.

Reject the car if you can, I can foresee a very hefty bill down the BMW garage.

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