I also got my OEM coils for free but i do now need to replace mine, and will be going Bosch.
i ended up going with BOSCH 0986221072 ignition coils, no issues with stage 1 tune so far. Put almost 20,00km since installation.
Try 07K905715G BOSCH
Bosch makes a lot of the oem coils, so I wouldn't shy away.
I ended up going with Bosch and haven’t had any issues.
Just stuck a load of Bosch in mine, worked a treat, xHP throttle blip downshifts were sometimes jerky and causing transmission faults but now they’re as smooth as butt’uh.
Coils: buy Bosch or Delphi coils. DO NOT BUY THEM OFF OF AMAZON. You would be better off leaving them then replacing them with an aftermarket brand.
I assumed it was bad and while it was sad to get rid of the OE Bosch, Autozone had a C831 coil that I was able to pick up. I think the boot was slightly too small but I’m 90% sure it’s making contact but I am still not getting it to arc.
I had all new Bosch coils installed on my e46 M3 about 30k miles ago. They worked fine, until one day the car went into limp mode due to bad coil / misfire.
But, its Bosch ignition coils had a defect and were being recalled.
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