I bought the Bosch 4 yr and 10k miles ago and haven't had issues.
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 won't install anything but the Delphi coils.
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.
I have them with APR Stage 1. R8 coil packs are not really an upgrade that people make them out to be... red = more performance.... Sure they came out of a R8 and V8 Touareg "BAR" engine code... but the coils make enough current to get a spark. The spark plug does the rest, and the features of the spark plug help with getting the air-fuel mixture ignited and burned. Because of the popularity of the red coils, you can often get them cheaper. I think last time I paid about $100 for the Bosch red coils from ShopDap.com
I decided to order the OEM Bosch coil off of FCP Euro. Same issue about a 1/4inch too long. Being kind of annoyed and noticing that they're pretty much identical decided to pull the rubber boot off the old and swap it with the new one.
The car now runs a lot better, however, I think the slight difference in ignition coils is making the car run slightly choppy at high rpms
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.
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