Also called a Heat Management Module by BMW, this electronic thermostat controls coolant flow based on engine temperatures
For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or later Gen3 engines
Brand:
ES#:
4179815
Mfg#:
11538642560
In Stock
9% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$446.99
This product was last offered at the strikethrough price on 07-06-2026
Also called a Heat Management Module, this electronic thermostat controls coolant flow based on engine temperatures
10X Entries For Our 25th Anniversary Sweepstakes! For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or later Gen3 engines
Brand:
ES#:
5433734
Mfg#:
11538642560
In Stock
ON SALE!
$356.99
This product was last offered at the strikethrough price on 05-02-2026
Feeds coolant from the water pump to the thermostat module
For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or later Gen3 engines
Brand:
ES#:
4179818
Mfg#:
11538650981
In Stock
8% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$109.99
This product was last offered at the strikethrough price on 07-25-2026
Connects to the thermostat module and supports the electrical wiring harness
For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or later Gen3 engines
Brand:
ES#:
4179822
Mfg#:
11538651265
In Stock
4% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$78.99
This product was last offered at the strikethrough price on 03-04-2026
Located on the side of the engine block, includes gasket
10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
5446086
Mfg#:
11118511205P
In Stock
ON SALE!
SAVE 20%
$15.99
This product was last offered at the strikethrough price on 05-02-2026
$12.79 USD
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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
