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Old 05-20-2019, 10:34 PM   #1
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Are OEM ignition coils necessary????

I'll be changing out the spark plugs for my 2012 Focus SE next week. The plugs are no problem (sp535 Motocraft) but my car has over 100,00 miles on it. Should I change out the ignition coils out as well and if so how important is it that they are replaced with OEM coils, because those are pretty expensive. Any and all feedback is greatly appreciated as always. Thanks


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Old 05-20-2019, 11:49 PM   #2
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Ive changed my plugs twice and have almost 160K on the engine. Coils are fine. If its not broken don't fix it!
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Old 05-21-2019, 02:17 AM   #3
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I agree with ProjectCommuter. Coils are something you only change when they stop working.
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Old 05-21-2019, 08:38 AM   #4
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Agree with the above. While coils can fail, they are not typically a wearing part like spark plugs and often last the life of the vehicle so no need to replace them proactively. If and when the time comes, you can revisit the OEM/aftermarket question. If anything, you could consider changing out the wires but if they are in good condition, even that is not necesary.
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Old 05-21-2019, 09:35 AM   #5
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Quote:
Originally Posted by IrishBrewer View Post
Agree with the above. While coils can fail, they are not typically a wearing part like spark plugs and often last the life of the vehicle so no need to replace them proactively. If and when the time comes, you can revisit the OEM/aftermarket question. If anything, you could consider changing out the wires but if they are in good condition, even that is not necesary.
COP= no plug wires.....
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Old 05-21-2019, 09:58 AM   #6
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Quote:
Originally Posted by felixthecat View Post
COP= no plug wires.....
Ha, forgot about that (been working on other cars lately). All the more reason not to change them!
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Old 05-21-2019, 11:32 AM   #7
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Thanks for the responses folks y'all have been a big help!
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Old 05-21-2019, 11:55 AM   #8
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Agree with the others. I changed my plugs around 100K and left the coils alone.
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