I went to Autozone and purchased a set of Duralast Ignition coils for $300, swapped all 4 and the car idled as good as new. I don't know if the Duralast coils will last very long, but they do have a no questions asked lifetime warranty so I can just get them replaced everytime it goes out.
I've switched from standard to the Bosch ones last summer and it significantly improved the acceleration on my 124 Abarth. Prior to the switch I'd see lots of misfires and "bumps" in the power delivery curve. The Bosch set was not a hard sale with being under 280€/260$ here in CZ. Highly recommended for anyone with power mods.
I replaced my coil around the same time, and no start failures for me either.
I gave the Jetta back to my son last week after replacing the coil. No issues yet - but mine was happening less frequently.
Been over a week with the new coil installed. No failures.
Yes, it's installed, and I have not had any failures since Monday. It was failing maybe every other day, maybe two times in a day.
This is a new Bosch coil (but also happened with old coil), wires, cap, rotor, and plugs as mentioned above.
I have changed the ignition coils, spark plugs, MAP sensor, fuel filter, and ran fuel cleaner in the tank twice. The only time it seemed better was for a couple of months after I changed ignition coils (Bosch).
9-3’s eat coils; it’s a forever problem on my 9-3 that it seems like every 30k miles I’m spending $200 on new coil packs. It’s essentially routine maintenance. I ordered Bosch OEM coil packs off RockAuto and just now realized they have a warranty. I submitted a warranty claim and they sent me out brand new units. Wish I would have known this because it would have saved me lots of money.
Just replaced my coils. AVOID Bosch. Literal trash that does not even work.
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