06-23-2021, 03:24 PM | #1 |
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Ignition coil replacements?
2016 340i stock up to 25k flashed stage 1 BM3 at 25k then at 30k put new OEM plugs In ( kept stock gap of .030 ) but did NOT replace coil packs... I’m at 35k now and I’m thinking of doing the new OEM coil packs now.....do I really need them at this point with stage 1?? And if I should do them stick with the $400 genuine bmw ones??
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06-23-2021, 03:40 PM | #3 |
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Drives: 2017 BMW 330i xDrive
Join Date: Jan 2021
Location: Auburn, AL
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At 35k miles, I wouldn't even be thinking about coils yet.
My general rule is to swap them out around 100k miles. I may shorten that interval on this car to 75k miles, but I guess I'll just see how it idles around that time. For replacements, BMW doesn't make them. I don't know whose they use, but it's a third party vendor that BMW gets to slap their stamp on and charge you a premium for it. NGK or Bosch would be a good replacement choice. German Bosch, not Chinese.
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06-23-2021, 04:32 PM | #4 | |
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06-23-2021, 04:54 PM | #5 | |
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06-23-2021, 04:56 PM | #6 | |
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06-23-2021, 05:26 PM | #7 |
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Same deal, if you're having spark blow out you adjust gap down. Small gap has pros and cons. I'd stay stock gap. Some people actually recommend not gapping iridium plugs because of how fragile the electrodes are. I run 0.022 on my custom turbo setup but it's very different from F30 stuff. I run stock gap and coils everywhere else.
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