Replacement thermostat With Housing for B46 and B48
10X Entries Into Our F80 M3 Sweepstakes For vehicles with the earlier Gen1 B48/B46 only - not compatible with the later Gen2 B48 (TU) engines
Located on the side of the engine block, includes gasket. OE+ Upgrade over the original.
2X Entries Into Our F80 M3 Sweepstakes We Price Match - Give Us A Call or Chat!
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 10-31-2026
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.
2X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
5470515
Mfg#:
11537644811
Ships in 3 Business Days
$322.99
This product was last offered at the strikethrough price on 06-11-2026
Replacement thermostat With Housing for B46 and B48
2X Entries Into Our F80 M3 Sweepstakes 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)
2X Entries Into Our F80 M3 Sweepstakes For vehicles with production from 07/2015 with the B46/B48 Gen1 engine
Brand:
ES#:
4940647
Mfg#:
597.170
In Stock
$134.99 USD
Free Shipping
on orders $49 and up
Lifetime Replacement
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