BMW E46 E39 Aluminium Thermostat Housing & Thermostat 11531437

BMW Aluminium Thermostat Housing Assembly – OEM 11531437040 / 11531436823

Upgrade your BMW’s cooling system with this CNC-machined aluminium thermostat housing assembly, designed as a direct replacement for fragile plastic OEM housings. Built for strength, reliability, and long service life.

✅ Key Features:

97 degrees thermostat (same as oem)

Powder coated finish

• Durable Aluminium Construction – Replaces factory plastic housing with CNC-machined aluminium for extended lifespan.

• Improved Cooling Performance – Helps prevent coolant leaks and overheating issues common with OEM plastic parts.

• Complete Kit – Includes housing, thermostat, and seals for easy installation.

OEM Part Numbers:

• 11531437040

• 11531436823