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A week ago I while driving my 2007 bmw 530xi (after quickly passing another car) I stopped at a red light....as soon as I stopped I found the engine really shaking ...I pulled to the side turned the engine off and started it again and it seemed ok.I used a code reader and got error 29CE - Misfiring cylinder 2. I just changed (the car has 112k...I changed the sparkplugs, pre-cat sensors, ac belt and pulley recently) all the spark plugs, I think I have a bad ignition coil...the questions is ....do I need to change all the coils....does the resistance on the coils decrease/increase over time? Do you think I'd get better performance by changing all 6 coils?
Country: United StatesMake: BMWModel: 530xiYear: 2007Engine: v6
Hello and welcome to JustAnswer BMW,My name is XXXXX XXXXX it will be my pleasure to assist you today.
just to confirm, there was only the miss in the one single cylinder? no other codes?
That is right ... No other codes
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okay, then if the plugs are new the coil is almost certainly the issue
you can replace just the one, you won't likely see a noticable/feelable improvement from doing all of them, but it certainly won't hurt
I hope that is helpful, please let me know if you have further questions, or if I can clarify anything for you.
Best wishes to you with your repair.
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thank you in advance.
Steve
Experience: BMW Expert