Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSBMW2011X5 35DREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE - REPAIRTHERMOSTAT AND CONNECTIONS11 53 000 REMOVING AND INSTALLING/REPLACING COOLANT THERMOSTAT (N55)

2011 BMW X5 35d

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

2011 BMW X5 35dSECTION 11 53 000 Removing and installing/replacing coolant thermostat (N55)

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. See \17 51 000 REMOVING AND INSTALLING/REPLACING CHARGE AIR COOLER (N54, N55) .
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).

NOTE: Illustration shows coolant thermostat removed.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.