Coolant Supply Line, Rein - 228i/328i/428i/528i, X1/X3/X4 28i, Z4 28i

This is the hose that carries coolant from the water pump to the engine block and oil filter housing on N20 engines in the F22 228i, F30 320i/328i, F32 428i, X1/X3/X4 28i, and Z4 28i. BMW calls it a "feed line".

Important Fitment Notes:
1. this hose part number only fits with engines that use an aluminum oil filter housing (not plastic). Most cars have been updated to an aluminum housing after a factory BMW replacement.
2. there are two versions of this hose. The end of this part number connects to a plastic elbow next to the oil filter cap. The other version (part #11537639997) connects directly to the oil cooler.
3. not for models with N26 SULEV engine.

This is an OEM water feed hose manufactured by Rein Automotive - the original supplier to BMW for this part, as well as many other engine components. As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.