Re: 320i E90 Engine vibration, rough idle and misfire. i recently resolved my low frequency shaking at D/P/N with rpm needle fluctuating +/-50rpm at P and N, but stable at D. the shaking is very low frequency type of shake, but very strong, can feel on the seat and even the floor. initially i thought is ignition coil damaged, but the technician
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change spark plugs bmw 320i
