Power Steering Cooler, BMW - E46 M3

This is the fluid cooler used in the power steering system on the 2001-2006 E46 M3. BMW calls it a radiator. The cooler runs fluid from the steering rack back to the reservoir and is exposed to airflow to cool the fluid. Leaks here are uncommon unless the pipes have been damaged by debris or corrosion.

This is a Genuine BMW power steering cooler with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.