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Audi B8 Cooling Expansion Tank Parts

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Expansion Tank Cap

ES#2815697 - 3B0121321 - Expansion Tank Cap - Keep proper pressure in your coolant system - Hamburg Tech - Audi Volkswagen

Keep proper pressure in your coolant system We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2815697
Mfg#:
3B0121321
Ships in 2 Business Days
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3672033 - 3C0121321 - Expansion Tank Cap - Keep proper pressure in your coolant system - Stant - Audi Volkswagen Porsche

Keep proper pressure in your coolant system

Brand:
Stant - Corporate Logo
ES#:
3672033
Mfg#:
3C0121321
Back Ordered
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant T Connector

ES#4899607 - N90692901 - Coolant T Connector - Connects to the lower radiator hose - Rein - Audi Volkswagen

Connects to the lower radiator hose 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Connects lower radiator hose to the coolant expansion tank hose and water pump hose

Brand:
Rein - Corporate Logo
ES#:
4899607
Mfg#:
N90692901
Ships in 4 Business Days
$9.99 USD
Free Shipping
on orders $49 and up

Coolant Overflow Hose

ES#5433823 - 8R0121081M - Coolant Overflow Hose - Expansion Tank To Radiator - URO - Audi

Expansion Tank To Radiator 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
URO - Corporate Logo
ES#:
5433823
Mfg#:
8R0121081M
Ships in 1 Business Day
$46.99

This product was last offered at the strikethrough price on
02-10-2026

$43.99 USD
Free Shipping
on orders $49 and up

Expansion Tank Bracket

Expansion tank bracket that bolts up to the vehicle frame

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3212558
Mfg#:
80A121232AQ
Ships in 3 Business Days
11% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$55.99

This product was last offered at the strikethrough price on
07-20-2026

$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit

ES#2678371 - 8K0121405NKT2 - Expansion Tank Replacement Kit - Install a brand new expansion tank with a new cap and hardware - Genuine Volkswagen Audi - Audi

Install a brand new expansion tank with a new cap and hardware

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2678371
Mfg#:
8K0121405NKT2
Ships in 5 Business Days
$236.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Upper Hose

Connects the expansion tank to the coolant flange Up to production date 4/9/2012

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2785693
Mfg#:
8K0121081BT
Special Order: No Guaranteed ETA
9% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$149.99

This product was last offered at the strikethrough price on
07-20-2026

$136.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose - Upper

Connects the expansion tank to the cylinder head flange We Price Match - Give Us A Call or Chat!
Up to production date 4/9/2012

Brand:
Vaico - Corporate Logo
ES#:
4819054
Mfg#:
8R0121081
Special Order: No Guaranteed ETA
$99.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

Plastic reservoir for the coolant system 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5397089
Mfg#:
8K0121403Q
Ships on Nov 19, 2026
Auto Notify
ON SALE! SAVE 16%
$30.99

This product was last offered at the strikethrough price on
05-02-2026

$26.00 USD
Free Shipping
on orders $49 and up

Coolant Expansion Tank

ES#4901309 - 8K0121403AC - Coolant Expansion Tank - Plastic reservoir for the coolant system - Meyle - Audi

Plastic reservoir for the coolant system 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
4901309
Mfg#:
8K0121403AC
Special Order: No Guaranteed ETA
$34.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Plastic Coolant Hose

ES#5341424 - 80A121081S - Plastic Coolant Hose - Connects the expansion tank to the radiator - Rein - Audi

Connects the expansion tank to the radiator 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Rein - Corporate Logo
ES#:
5341424
Mfg#:
80A121081S
Back Ordered
$58.99 USD
Free Shipping
on orders $49 and up

Coolant Expansion Tank

See your coolant levels clearly again, comes with coolant level sensor 2X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with model year up through 2020 (engine code DJYA)

Brand:
Rein - Corporate Logo
ES#:
5470726
Mfg#:
80A121405AQ
Back Ordered
$68.99 USD

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.

Let us help you find the parts that fit your Audi

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