Was reading a Bmw Car magazine M special yesterday and got to the " Battle of the beasts" article pitting the Z4 M coupe against the earlier Z3 version when I saw the pics of the cars,the Z4 was imola red reg no YF06USG I had to look twice,mine is virtually identical bar two letters and was first registered by BMW UK,I wonder if the current owner of the test car is a member of this forum. The articles also mentioned a possible reliability problem with "crankcase ventilation oil separator" which I assume is the canister like item on the r/h wing of engine bay. Does anyone know what goes wrong with them and can they be periodically maintained at home or is it a replacement only or dealer strip job?


