Replacement thermostat With Housing for B46 and B48
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles with the earlier Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines
Brand:
ES#:
4686052
Mfg#:
11537644811
In Stock
ON SALE!
SAVE 15%
$223.99
This product was last offered at the strikethrough price on 05-02-2026
Located on the side of the engine block, includes gasket
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat! For vehicles with the earlier Gen1 B46/B48 engine - Not compatible with the later TU engines
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) For later models with the B48 Gen2 (B48D) engine only - Not compatible with earlier Gen1 engines
OEM replacement thermostat with housing and gasket for B46 and B48.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 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
10% 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 06-05-2026
Replace leaking or worn coolant flange with this Genuine BMW part
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For B48TU Gen 2 applications (B46D/B48D)
Brand:
ES#:
4732047
Mfg#:
11515A74E79
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.
$133.99
This product was last offered at the strikethrough price on 06-05-2026
Connects the cylinder head to the water pump
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For models with the B48D, B46D, or B46X engines only - Not for the earlier Gen1 or later Gen3 engines
Brand:
ES#:
4179820
Mfg#:
11538650984
In Stock
2% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$138.99
This product was last offered at the strikethrough price on 03-04-2026
Your engine relies on a steady temperature to stay healthy and efficient. With the Rein CTA0079, you’re getting OE-level quality and a frustration-free install that gets your car back to peak performance.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Main cylinder head gasket 1.00MM (+0.3) (plus size)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with production from 07/2015 with the B46/B48 Gen1 engine
Replacement thermostat With Housing for B46 and B48
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat! For vehicles with the earlier Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines
Main cylinder head gasket 1.00MM (+0.3) (plus size)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with production from 07/2015 with the B46/B48 Gen1 engine
Brand:
ES#:
3553687
Mfg#:
11128654273
In Stock
ON SALE!
$238.99
This product was last offered at the strikethrough price on 05-02-2026
Main cylinder head gasket 0.70mm (standard size)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Brand:
ES#:
4667289
Mfg#:
11128654272
In Stock at Vendor
$136.99
This product was last offered at the strikethrough price on 01-05-2026
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) For later models with the B48 Gen2 (B48D) engine only - Not compatible with earlier Gen1 engines
Main cylinder head gasket 1.00MM (+0.3) (plus size)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with production from 07/2015 with the B46/B48 Gen1 engine
Brand:
ES#:
4940647
Mfg#:
597.170
Special Order: No Guaranteed ETA
$134.99 USD
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Lifetime Replacement
More About Engine Coolant Flanges & Parts
Replace a cracked or failed coolant flange with a brand new coolant flange to stop those leaks!
Lifetime Replacement
