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      12-11-2018, 03:55 PM   #1
E90705
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So I swapped the OEM bmw ones last year (made by Delphi) nothing wrong with them just did as a preventative measure with new spark plugs as well before I added a jb4 tune at the time. About 7k miles later I get a misfire. I have MHD tablet so I hooked up what the CEL was "cylinder 6 misfire". Disappointed the coil pack didn't last very long. The car could barely accelerate from a stop and the car shook unpleasantly. I took a couple pics and ordered a whole new set of coils and sparks. Same model DELPHI coils. The tabs up top seem lesser quality but the rubber boots where it seems to matter more have a bit more quality than the first set I had in 2017.

The pic of the three coils are in this order: left is OEM bmw original coil. Middle misfire coil (rubber boot seems warped and aluminum part discolored, right third is new Delphi.
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      12-22-2018, 10:59 AM   #2
oaklandish
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Do you have to swap coils when you swap spark plugs?
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      12-22-2018, 11:26 AM   #3
E90705
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Quote:
Originally Posted by oaklandish View Post
Do you have to swap coils when you swap spark plugs?
I swapped all my sparks at the same time. I would but you don't have to
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      12-22-2018, 01:24 PM   #4
Wgosma
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Quote:
Originally Posted by oaklandish View Post
Do you have to swap coils when you swap spark plugs?
Coil packs should last the life of the car. I think I did read a while back that BMW had a quality issue with one of their suppliers/manufacturers on this product- but as I recall that was years ago and was resolved.
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      12-24-2018, 12:37 PM   #5
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Interesting. We used Febi on our N52 X3 as coil pack replacements. Been happy with those.

OP - 7,000 miles is not premature, that just sounds like defective, no?
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