Over time, heat cycles degrade the plastic components, internal electronics fail, and you're left stranded with a yellow (or worse, red) coolant warning light on your dash.
10X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
5481358
Mfg#:
11517604027KT2
In Stock
ON SALE!
SAVE 21%
$494.99
This product was last offered at the strikethrough price on 09-10-2026
Looking to swap out your thermostat without the headache? This thermostat housing from Rein Automotive is designed to make your repair feel less like a project and more like a simple "plug-and-play" fix.
2X Entries Into Our F80 M3 Sweepstakes
Keep your engine operating at its peak thermal efficiency with this premium replacement thermostat assembly from Febi Bilstein.
Brand:
ES#:
5491409
Mfg#:
11538635689
Special Order: No Guaranteed ETA
$126.99 USD
Free Shipping
on orders $49 and up
More About Engine Thermostat Parts
Your thermostat helps regulate engine temperatures by allowing the coolant to circulate through the radiator once it opens. If it fails, this might mean it never closes, but worst case, it could mean your coolant doesn't get to the radiator. Stay ahead of cooling issues by replacing your thermostat regularly with an OEM thermostat or quality aftermarket thermostat from our selection.
Lifetime Replacement
