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Audi B8 Cooling Expansion Tank Parts

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Expansion Tank Replacement Kit

ES#2762640 - 8K0121405MKT - 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 Up to production date 3/11/2008

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2762640
Mfg#:
8K0121405MKT
Ships in 2 Business Days
$237.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4883484 - 8K0121405S - Coolant Expansion Tank - Includes the heat shield and cap - Rein - Audi

Includes the heat shield and cap 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4883484
Mfg#:
8K0121405S
In Stock at Vendor
$52.99 USD
Free Shipping
on orders $49 and up

Expansion Tank Upper Hose

ES#5433827 - 8K0121081AB - Expansion Tank Upper Hose - Overflow relief hose for the radiator - URO - Audi

Overflow relief hose for the radiator 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
URO - Corporate Logo
ES#:
5433827
Mfg#:
8K0121081AB
In Stock
$27.99

This product was last offered at the strikethrough price on
03-11-2026

$23.50 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant T Connector

ES#470540 - N90692901 - Coolant T Connector - Connects to the lower radiator hose - Genuine Volkswagen Audi - Audi Volkswagen

Connects to the lower radiator hose Connects lower radiator hose to the coolant expansion tank hose and water pump hose

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
470540
Mfg#:
N90692901
Ships in 1 day
9% off MSRP

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

$32.99

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

$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4668543 - 8K0121405R - Coolant Expansion Tank - Includes the heat shield - Febi - Audi

Includes the heat shield 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Up to production date 3/11/2008

Brand:
Febi - Corporate Logo
ES#:
4668543
Mfg#:
8K0121405R
Ships in 7 Business Days
Auto Notify
$72.99

This product was last offered at the strikethrough price on
05-07-2026

$62.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3642053 - 8K0121405R - Coolant Expansion Tank - Includes the heat shield - Genuine Volkswagen Audi - Audi

Includes the heat shield Up to production date 3/11/2008

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3642053
Mfg#:
8K0121405R
Ships in 2 Business Days
8% off MSRP

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

$203.99

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

$186.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4066649 - 8K0121403Q - Coolant Expansion Tank - Plastic reservoir for the coolant system - Hamburg Tech - Audi Porsche

Plastic reservoir for the coolant system We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
4066649
Mfg#:
8K0121403Q
Ships in 2 Business Days
$39.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3658435 - 8K0121403AC - Coolant Expansion Tank - Plastic reservoir for the coolant system - Rein - Audi Porsche

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

Brand:
Rein - Corporate Logo
ES#:
3658435
Mfg#:
8K0121403AC
In Stock at Vendor
$58.99

This product was last offered at the strikethrough price on
05-07-2026

$57.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3615693 - PAB121403 - Coolant Expansion Tank - Plastic reservoir for the coolant system, cap not included. - Genuine Porsche - Audi Porsche

Plastic reservoir for the coolant system, cap not included.

Brand:
Genuine Porsche - Corporate Logo
ES#:
3615693
Mfg#:
PAB121403
Ships in 2 Business Days
$72.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expanding Nut - Priced Each

ES#2891455 - 811807577C - Expanding Nut - Priced Each - Install new hardware with your new parts. - Vaico - Audi Volkswagen

Install new hardware with your new parts. We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2891455
Mfg#:
811807577C
In Stock
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#450277 - 8K0121109AA - Expansion Tank Hose - Connects the expansion tank to the radiator - Genuine Volkswagen Audi - Audi

Connects the expansion tank to the radiator

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
450277
Mfg#:
8K0121109AA
Special Order: No Guaranteed ETA
8% off MSRP

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

$154.99

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

$141.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap - Black

ES#4818658 - 5Q0121321 - Expansion Tank Cap - Black - Keep proper pressure in your coolant system - Bremmen Parts - Audi Volkswagen Porsche

Keep proper pressure in your coolant system 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818658
Mfg#:
5Q0121321
In Stock
ON SALE! SAVE 24%
$15.99

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

$12.23 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

Brand:
Behr - Corporate Logo
ES#:
3658436
Mfg#:
8K0121403AC
In Stock at Vendor
$130.00

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

$69.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3412065 - 8K0121405N - Coolant Expansion Tank - Includes the heat shield - Hudson - Audi

Includes the heat shield

Brand:
Hudson - Corporate Logo
ES#:
3412065
Mfg#:
8K0121405N
Ships in 1 day
$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4883482 - 8K0121405R - Coolant Expansion Tank - Includes cap - Rein - Audi

Includes cap 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Up to production date 3/11/2008

Brand:
Rein - Corporate Logo
ES#:
4883482
Mfg#:
8K0121405R
Ships in 1 Business Day
$55.99 USD
Free Shipping
on orders $49 and up

Coolant Overflow Hose

ES#1285729 - 8R0121081M - Coolant Overflow Hose - Expansion Tank To Radiator - Genuine Volkswagen Audi - Audi

Expansion Tank To Radiator

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1285729
Mfg#:
8R0121081M
Ships in 2 Business Days
8% off MSRP

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

$60.00

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

$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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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