Bosch working great for a few years now, cheap as dirt on rockauto
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 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 started having some minor issues at about 45,000 miles (solved by changing the coils), and other people have had similar experience... So I change them that often.
The F revision was current as of April 2015 when I replaced all of the factory coil packs that were installed in my 07 2.5 Jetta. I had one go bad and decided to just replace all of them and the plugs while I had it all opened up.
VW makes bad ignition coils, period. Bad design, bad reliability, bad everything. They actually came out in pieces and were siezed into the head on some cylinders. There was several inches of calcification and junk from water going down into the holes (no engine cover for 123,000 miles). I had to blow out the plug holes with air compressor, after I vacuumed the inches of calcium dust out, then still after I removed the plugs found rust under the crush washer they seat on. It wasn't fun and I had to polish the holes up to hopefully stop that disgusting build up. It was BAAAAAD looking but it ran fine with only a single misfire up to almost 130k.
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