Quote Originally Posted by ciars
Have you had the turbo checked? You could do it yourself, check for oil seeping or play on the shaft by popping off the intercooler pipe. What colour was the smoke? Was it excessive?

Here is a previous thread of mine on the M47N version of this engine: http://www.bmwhaus.ie/forum/showthread.php?tid=403
Was white smoke was a good bit for 10 miles or so but their hasn't been any smoke since. Mechanic reckons turbo is fine on it. Would that normally be happening if MAF sensor was the problem?