Coolant Hose, Cylinder Head to Thermostat, Rein - E82 135i, E9X 335i, Z4 35i N54

This part is listed by BMW as BMW part number 11537541992 (11 53 7 541 992) and is described as Water / Coolant Outlet Hose for N54-powered 2007-2010 E9X 335i/335xi, 2008-2010 E82/E88 135i, and 2009-2016 E89 Z4 35i & 35is. 

This hose connects from the front of the cylinder head to the thermostat. It's an outlet hose that drains the cylinder head of hot coolant back to the thermostat. The plastic connector to the head is a weak point and prone to leaking coolant on the front of the N54 motor. An aluminum connector is also available as an upgrade (see below). Make sure you fix coolant leaks quickly as coolant can get to the belts and cause further damage. This particular hose is easy to change at the same time as a thermostat or water pump replacement, and is a great preventative item to replace. 

Only for N54 twin-turbo 135i, 335i, and Z4 models.

This is an OEM-type coolant hose manufactured by Rein - an original supplier to BMW for many other engine and cooling parts. As an OEM Rein products meet all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM-type 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.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us 877-639-9648.

BMW Fitments:

1 Series
E82 / E88 (08-13) > 135i N54 (08-10)
E82 / E88 (08-13) > 1M (11-12)
3 Series
E90 / E91 / E92 / E93 (06-13) > 335i N54 (07-10)
E90 / E91 / E92 / E93 (06-13) > 335is N54
E90 / E91 / E92 / E93 (06-13) > 335xi N54 (07-10)
Z Series
E89 Z4 (2009-2016) > Z4 sDrive35i
E89 Z4 (2009-2016) > Z4 sDrive35is