Coolant Expansion Tank Cap – Locking Lid For VW/Audi – 1H0121321A Replacement – MAXGEAR

Need a new cap for your coolant tank?

This is a high-quality replacement locking lid from MAXGEAR.

It's a direct fit for many VW and Audi models, matching a bunch of OE numbers including 1H0121321A, 357121321, and 1H0121321C.

If your old cap is cracked, leaking, or just not sealing right, grab this one.

It's part of the cooling system (Produktgruppe: Kühlsystem) and is essential for keeping pressure in the system.

Don't overheat because of a cheap plastic cap.

Get this original-quality replacement and keep your engine cool.