Also called a Heat Management Module by BMW, this electronic thermostat controls coolant flow based on engine temperatures
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later models that feature the B48N/B48P engine
Brand:
ES#:
4179815
Mfg#:
11538642560
In Stock
6% 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 06-12-2026
Includes the components needed to replace the two biggest B48 cooling issues, plus most of the "while you are in there" parts we highly recommend replacing - featuring an Aluminum Oil Filter Housing, Coolant Thermostat Module, and coolant pump assembly!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles without Energy Recovery System (S1CEA)
Connects to the thermostat module and supports the electrical wiring harness
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later models that feature the B48N/B48P engine
Brand:
ES#:
4179822
Mfg#:
11538651265
In Stock
1% 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
Feeds coolant from the water pump to the thermostat module
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later models that feature the B48N/B48P engine
Brand:
ES#:
4179818
Mfg#:
11538650981
In Stock
10% 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 06-12-2026
Also called a Heat Management Module, this electronic thermostat controls coolant flow based on engine temperatures
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later models that feature the B48N/B48P engine
Brand:
ES#:
5433734
Mfg#:
11538642560
In Stock
ON SALE!
$356.99
This product was last offered at the strikethrough price on 05-02-2026
Also called a Heat Management Module by BMW, this electronic thermostat controls coolant flow based on engine temperatures
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Includes the main components needed to replace the two biggest B48 cooling issues - featuring an upgraded Aluminum Oil Filter Housing and new Coolant Thermostat Module
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles without Energy Recovery System (S1CEA)
Our most comprehensive kit yet, including the majority of components that should be replaced when repalcing your oil filter housing and thermostat module - featuring an Aluminum Oil Filter Housing, Coolant Thermostat Module, and coolant pump assembly!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles without Energy Recovery System (S1CEA) For models with a production date from 07/2021+ with Control DSC (S8WEA)
Brand:
ES#:
5425190
Mfg#:
G2XB48DOFHL3AKT
Ships in 7 Business Days
$2377.99
This product was last offered at the strikethrough price on 06-09-2026
Our most comprehensive kit yet, including the majority of components that should be replaced when repalcing your oil filter housing and thermostat module - featuring an Aluminum Oil Filter Housing, Coolant Thermostat Module, and coolant pump assembly!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles without Energy Recovery System (S1CEA) For models with a production date up to 07/2021 or a production date from 07/2021+ without Crontrol DSC (S8WEA)
Brand:
ES#:
5425185
Mfg#:
G2XB48DOFHL3KT
Ships in 7 Business Days
$2377.99
This product was last offered at the strikethrough price on 06-09-2026
$2359.99 USD
Partial Replacement
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
