Hi, I have an E24, the chap at the garage said the air flow meter is turned up to the max and cannot give any more so a replacement needs to be sought. This results in it running a bit lumpy. An A.f.m. Isbetween 100 and 500 quid, the 100 is a second hand untested, so I'm reluctant to part with the funds. I have acquired an E28 unit which comes from a trusted breakers, but they don't fit them themselves. There's loads of pictures of e24's on ebay and when you look close at the engine you can see the e28 unit which fits inverted. See attached. Does any one have experience of fitting such a unit to the e24, how was it attached to prevent vibration, is it a s simple as merely reconnecting or is there an adjustment required, which obviously when fitted upside down is going to be difficult. Any advice on fitting mass air flow units greatly appreciated. Richard