This products is an OEM replacement for the plastic fitting on BMW PN 11537541992 and 11537544638. It fits the N54, N53 and N52 3.0-litre motors.

This BMW PN consists of a 25mm (1.0") hose and a plastic fitting. This hose runs from the coolant thermostat housing to the front of the head.

The plastic fitting on this hose is a known weak spot in the coolant system as it commonly cracks and leaks.