In Reply to: What is "Euro HFM"? Thanks. (eom) posted by Jimmy on May 12, 1999 at 11:31:26:
A Euro HFM is actually a larger Air mass sensor than what the US M3 has. This Euro HFM can only be fitted on 95' OBD1 M3's. for what reason why? I have no idea. By the way, HFM doesn't stand for High Flow Meter, which I heard from many people. It actually stands for Hot Film Mass. And don't even think about removing it!