Purchased BM3 tune for stage 2 on my f80 m3. There product is very misleading, if you are running after market intakes, their ots map is not compatible. Even when switched back to stock air boxes the same codes still occur. Customer service is horrendous. I strongly urge anyone considering bm3 for their car to search elsewhere. All their product does is cause you a check engine light and harsh idles. They will claim it’s your coil packs and spark plugs, but that’s not the issue, save your money. There is zero help other than spending an additional $800 on a custom map from one of their preferred tuners, after spending $900 on their product and “maps bundle” - what an absolute joke.