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Audi S4 Cooling Expansion Tank Parts

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Expansion Tank Cap

ES#3970163 - 443121321 - Expansion Tank Cap - Keep proper pressure on your coolant - Meyle - Audi Volkswagen

Keep proper pressure on your coolant 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3970163
Mfg#:
443121321
Ships on Sep 23, 2026
$5.99 USD
Free Shipping
on orders $49 and up

Coolant Expansion Tank

ES#5492820 - 8K0121405S - Coolant Expansion Tank - Coolant reservoir to cure hairline cracks, resolve false low-coolant warnings, and restore the structural integrity of your pressurized cooling system. - Febi - Audi

Coolant reservoir to cure hairline cracks, resolve false low-coolant warnings, and restore the structural integrity of your pressurized cooling system.

Brand:
Febi - Corporate Logo
ES#:
5492820
Mfg#:
8K0121405S
Special Order: No Guaranteed ETA
$45.99 USD
Free Shipping
on orders $49 and up

Coolant Expansion Tank

Includes integrated coolant level sensor 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Rein - Corporate Logo
ES#:
5470754
Mfg#:
8W1121405N
Back Ordered
ON SALE!
$100.99

This product was last offered at the strikethrough price on
08-31-2026

$95.36 USD
Free Shipping
on orders $49 and up

More About Cooling Expansion Tank Parts

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.

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