BMW Repair Questions? Ask a Mechanic for Answers ASAP
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Can you suggest a possible cause for the lack of power. Car is firing on all cylinders, no warning lights, plugs renewed, air filter renewed. From running normally the change to lack of power was 'overnight'. I have read forums that name the timing chain tensioner as the culprit (a number of people have had a similar experience) or the oxygen sensors. I am curious about the very brief 'rattle' on acceleration - or attempted acceleration because little happens.