OEM replacement thermostat with housing and gasket for B46 and B48.
For vehicles with the earlier Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines
Brand:
ES#:
3198177
Mfg#:
11537644811
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.
$602.99
This product was last offered at the strikethrough price on 10-25-2026
Lower IATs, increase cooling system reliability and efficiency! Featuring durable all-aluminum construction & TIG-welded billet aluminum end tanks.
10X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
5373996
Mfg#:
008765LA01KT
In Stock
ON SALE!
SAVE 13%
$1223.99
This product was last offered at the strikethrough price on 06-13-2026
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!
10X Entries Into Our F80 M3 Sweepstakes For vehicles without Energy Recovery System (S1CEA) For later models with the B48 Gen2 (B48D) engine only - Not compatible with earlier Gen1 engines
Brand:
ES#:
5425175
Mfg#:
G2XB48DOFHL2KT
Ships in 2 Business Days
ON SALE!
$1733.99
This product was last offered at the strikethrough price on 06-15-2026
Manufactured with premium OE quality material designed to withstand the high demands of automotive power turbo systems
2X Entries Into Our F80 M3 Sweepstakes We Price Match - Give Us A Call or Chat!
Optimize your engine cooling system performance and heater output with quality drive belts, coolant hoses, cooling system parts, and approved coolant fluids from ECS Tuning. Head off expensive repairs and untimely breakdowns with regularly scheduled cooling system inspection and maintenance.
Partial Replacement
