It's an e91 320d with the M47 engine. Yeah I suppose cleaning the MAF sensor can't do any harm.Originally Posted by Venom
I'll have to go looking in the bin for the old filter. A new one will set me back 80 quid, so that might be the best option if it will fix it.Originally Posted by Roberto
I wouldn't have thought I'd have to disconnect the battery when changing an air filter, but I suppose it can't do any harm.
Has anybody else ever seen performance gain when using a K&N filter with a diesel Beemer engine? I had one in my old petrol e39 and there was no difference at all.