11 53 000 Removing and installing/replacing coolant thermostat (N55)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. 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 in a suitable collecting vessel.

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 tasks:

Remove front UNDERBODY PROTECTION .
E70, E71 :
Remove reinforcement plate.
E82, E84, E88, E90, E91, E92, E93, F25 :
Remove CHARGE AIR COOLER .
Remove FAN COWL .
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 On Thermostat

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).

Fig 2: Identifying Coolant Thermostat, Plug Connection, Hose Clamp And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Illustration shows coolant thermostat removed.

Assemble engine.

FILL THE COOLING SYSTEM .

Observe CAPACITIES .

Installation note:

Check coolant hoses for cracks and damage.

Renew coolant hoses as required.

Recommendation:

On vehicles older than five years, renew coolant hoses.

Check function of cooling system.