Cylinder 4 misfire failure on my 08' X5 3.0i. I think that's probably the cheapest place to start (replaced all 6 spark plugs in the last year). Installed, perfectly fitting, started, no problem! Rav up to 3500 RPM and no code (last time the misfire was at 3500 RPM). Traveled 2 days so far, so good. hope it lasts Otherwise I'll report back for a bad rating. LAUGH OUT LOUD. Good price for the secondary market.
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