No aftermarket radiator (Nissens, Behr, etc) for the N52 engine Z4 ?
I am replacing my radiator and ordered an aftermarket Nissens online. While opening the package, I looked at the original radiator and there is an extra port under the lower radiator hose goes that the Nissens does not have. I ordered online and it said that the part fits but obviously doesn't. Other online parts store lists the same listing. It looks like the oem radiator BMW part # 17117551635 was only made for the 2006-2008 Z4 roadster and coupe. I will keep looking but I might just be stuck paying a pricey $300 for the oem rad.