Upgraded Aluminum Thermostat Housing Kit For BMW E46 E39 325i 330i 525i 530i X5 X3 Z4

This is a brand new, upgraded aluminum thermostat housing assembly, designed as a direct replacement for your BMW.

If you own an E46, E39, X5, X3, or Z4 (specifically models like the 325i, 330i, 525i, or 530i), this is the part you need.

We’ve moved away from the stock plastic version to a much more durable aluminum build, which means you won’t have to worry about it cracking or leaking down the road.

It comes as a complete unit with the thermostat already installed, so installation is straightforward.

This part replaces the original BMW numbers 11531437040 and 11531436823.

Built from high-quality aluminum and sourced from China, it comes with a full 1-year warranty for your peace of mind.

Get your BMW running cool and stay cool with this reliable upgrade.