Coolant Hose, Cylinder Head to Thermostat, Vargas - 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 a silicone 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. This Vargas hose includes a new aluminum connector. 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 a silicone version of the stock rubber hose. Silicone hoses are much more durable than stock, hold more pressure, and retain their flexibility longer. While not indestructible, silicone holds up much better than rubber in high-stress engine builds and is more resistant to heat. While not a performance upgrade, this silicone cooling hose offers greater reliability and long-term durability than rubber. Additional silicone hoses are also available to complete your N54 cooling system upgrade.

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

BMW Fitments:

1 Series
E82 / E88 (08-10) > 135i
E82 (11-12) > 1M Coupe
3 Series
E90 / E92 / E93 (07-10) > 335i
E90 / E92 / E93 (11-13) > 335is
E90 / E92 / E93 (07-10) > 335xi
Z Series
E89 Z4 (09-16) > Z4 sDrive 35i
E89 Z4 (09-16) > Z4 sDrive 35is