vs
Ignition coil DELPHI or Duralast
There are a lot of parts you can trust aftermarket, but electronics are usually better OEM. Denso and Delphi make a lot of OEM Subaru parts. In this case, I believe Delphi is the OEM manufacturer for coil packs, I would try them.
Pros: OEM quality, reliable
Vehicle:
Subaru XV
Delphi. BMW started with Bosch and after misfire issues they switched to Delphi (I think in 2011?). Go with Delphi, my old e82 with an n52 had tons of misfires at 40k with Bosch coils and the Delphi’s had no issues.
Pros: no misfire issues
Cons: misfires with Bosch
Vehicle:
BMW
Mileage: 40000 km
I had issues with misfires until I replaced the coils with genuine oem. Before that I had all new Delphi 10571 which were not the same and ultimately fixed my misfire issues.
Pros: fixed misfire issues
Cons: Delphi coils not the same
Part number: 10571
One additional benefit is that the Duralast Coils have a free replacement for life. FWIW I put about 4 coils on my old 2007 and never had one fail over the course of 5 years and ~50k miles.
Pros: free replacement, never failed, reliable
Vehicle:
Honda Fit
Mileage: 80467 km
I went to Autozone and purchased a set of Duralast Ignition coils for $300, swapped all 4 and the car idled as good as new. I don't know if the Duralast coils will last very long, but they do have a no questions asked lifetime warranty so I can just get them replaced everytime it goes out.
Pros: idled as good as new
Cons: longevity is unknown
Vehicle:
Kia
Mileage: 108000 km
I won't install anything but the Delphi coils.
Pros: reliable Delphi coils
Bosch Delphi eldor they’re all the same you can’t really say one is better than the other. Some go bad early that’s just what it is. I personally went with Delphi (they’re quite a bit cheaper on eBay). But the lifetime return/replacement from fcp is pretty enticing.
Pros: cheap on eBay, lifetime warranty
Cons: some fail early
They’re made by Delphi but they are different internally than the Delphi gn10571 or whatever they are, in the aftermarket. I had misfire issues and strange electrical feedback with Delphi aftermarket.
Cons: misfire issues, strange electrical feedback
Vehicle:
BMW
I’m having similar jerking problems like when my plugs/coils went bad again and the mechanic suggests coils, especially if I don’t have “Honda brand” coils. How bad off are duralast coils? Autozone is switching out these ones now for free due their warranty but I know now if the car starts messing up again that I need a new brand. I drive A LOT, so I’m wondering how normal is it for duralast coils to go bad so fast? They were literally changed in the mid winter. I can imagine I drove about 10-15k miles before my car started having problems again
Cons: failed quickly, jerking problems
Vehicle:
Honda Civic
Mileage: 16093 km
I had troubles with Delphi units. Replaced all 6, then replaced them again with a wty set. Still had issues.
Cons: issues with Delphi units
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