Thermostat Hose, Rein - 228i/328i/428i/528i, X1/X3/X4 28i, Z4 28i

This is the hose that carries coolant from the engine block to the thermostat on N20/N26 engines in the F22 228i, F30 320i/328i, F32 428i, X1/X3/X4 28i, and Z4 28i.

Note: the connection flange to the engine block is plastic and is a known weak source of coolant leaks. Check this flange first as you may not need a new hose at all. An aluminum flange is available to replace the original plastic piece. If you would like to replace the hose too, a new plastic flange is included.

This is an OEM thermostat 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.

BMW Fitments:

2 Series
F22 / F23 (2014-2021) > 228i
3 Series
F30 / F31 / F34 (2012-2019) > 320i
F30 / F31 / F34 (2012-2019) > 320i xDrive
F30 / F31 / F34 (2012-2019) > 328i
F30 / F31 / F34 (2012-2019) > 328i xDrive
4 Series
F32 / F33 / F36 (14-20) > 428i
F32 / F33 / F36 (14-20) > 428i xDrive
5 Series
F10 / F11 (11-16) > 528i N20 (2012-2016)
F10 / F11 (11-16) > 528i xDrive N20 (2012-2016)
X1 Series
E84 X1 (2013-2015) > X1 28i
X3 Series
F25 X3 (2011-2017) > X3 sDrive28i
F25 X3 (2011-2017) > X3 xDrive28i
X4 Series
F26 X4 (2015-2018) > X4 28i xDrive
Z Series
E89 Z4 (2009-2016) > Z4 sDrive28i