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Greg C

06-03-2026 10:52 PM

Bad ignition coil. Replace all?

Have a 2013 35i with 135K.
Had coil for cylibder 4 go out. I have already replaced it.
Question is, should I replace all of them?

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andrewwynn

06-03-2026 11:27 PM

I did on wife's n55. We replaced 2-3 that were acting up then did all the rest.

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