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Taken a month of pulling teeth, but think Ive gotten somewhere. Got in touch with recaros Marketing Manager in the US, who got in touch with the VP of Recaro Japan.. and things happened. All the Recaro minions, like Recaro Aussie rep, were much less than what would be considered helpful. Documentation with the cert man... hopefully I have an LVV cert shortly.

Was just looking at some VQ37 engine info on the net and noticed the E46 got a mention in the swaps area, what a funny surprise 🤣 Definitely had to do a double take there ... https://www.drifted.com/vq37vhr/

@Cement That is my stomping ground but not mine (sadly!) MTech1 M325i with a S50B32 under the hood and fresh out of the paint booth!

A beauty at the Birkenhead New World... Though @Sammo might have had a make over!!

Lean codes are mostly vacuum leaks on these engines so you need to start with a pressurized smoke test, waste of time imo trying to find leaks without one. You can DIY one easy enough with hardware store etc parts and most people have an air compressor. Test is pretty simple - Remove airbox and ducting, remove the MAF and install a airtight zip lock bag etc on the front on it and re-install it. You can then either remove the F connector from the intake boot in front of the maf and pump smoke in there, or you can use the rubber capped intake ports at the back of the intake manifold (which can leak). This requires removing the cabin filter, housing and side of the ecu box which is straight forward but gives you even more room to see any possible smoke.