1153000 Removing and installing/replacing coolant thermostat (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 328xi, 2010 BMW 328i, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of scalding!
Only perform these tasks on an engine that has cooled down.
Danger of injury!
Risk of skidding due to coolant on the floor.

Recycling

Catch and dispose of drained coolant.

Observe country-specific waste disposal regulations.

IMPORTANT: Read and comply with GENERAL NOTES .
Protect plug connections against coolant and dirt contamination.
Cover plug connections with suitable materials.

Necessary preliminary work:

Remove front UNDERBODY PROTECTION .
Place oil drip tray for coolant under engine compartment.

NOTE: Illustration shows coolant thermostat removed.

Disconnect coolant hoses (arrows) on the thermostat (1) with clamping tongs.

Fig 1: Locating Coolant Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

Release hose clamp (1) and detach coolant hose.

Release hose clamp (2) and detach coolant hose.

Unlock and detach coolant hose (3).

Unlock and detach coolant hose (4).

Disconnect plug connection (5).

Release screws (6).

Tightening torque: 11 53 1AZ .

Remove coolant thermostat (7).

NOTE: Illustration shows coolant thermostat removed.

Fig 2: Identifying Coolant Thermostat With Hose Clamps, Screws And Coolant Hoses

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Fill COOLING SYSTEM .

Check function of cooling system.