Connects the cylinder head to the expansion tank
2X Entries Into Our F80 M3 Sweepstakes For models with the earlier B48D, B46D, or B46X engines - Not compatible with the later models that feature the B48N/B48P engine
Replacement plastic coolant reservoir for the low temp circuit that cools your intercooler
For models with the later Gen3 engines only (B58N & B48P) - Not for use with the early Gen3 engines (B58D & B46D/X)
Brand:
ES#:
4757672
Mfg#:
17135A270D3
Ships in 4 Business Days
6% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$170.99
This product was last offered at the strikethrough price on 10-16-2026
Whether you’re under the hood for a weekend project or keeping a high-performance engine in peak shape, the last thing you want to worry about is a brittle cooling system. That’s where the Rein Automotive Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
A common source of overheating problems is a broken or leaking coolant expansion tank. Replace it with an OEM coolant expansion tank or quality aftermarket expansion tank to prevent future woes.
