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Audi B5 Cooling Expansion Tank Parts

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Coolant Expansion Tank

ES#2816257 - 8D0121403L - Coolant Expansion Tank - Includes integrated coolant level sensor - Hamburg Tech - Audi Volkswagen

Includes integrated coolant level sensor We Price Match - Give Us A Call or Chat!
From VIN 8D-W-007800, split is in the 1998 model year

Brand:
Hamburg Tech - Corporate Logo
ES#:
2816257
Mfg#:
8D0121403L
Ships in 1 Business Day
$23.85 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2709072 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - URO - Audi

Plastic pressure cap for expansion tank 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2709072
Mfg#:
8E0121321
Ships in 1 Business Day
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap Seal

ES#2598146 - 1H0121687A - Expansion Tank Cap Seal - Seals the expansion tank cap to the reservoir. 28.5x3.8 - Vaico - Audi Volkswagen

Seals the expansion tank cap to the reservoir. 28.5x3.8 We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2598146
Mfg#:
1H0121687A
Ships in 1 Business Day
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap - Black

ES#3970169 - 5Q0121321 - Expansion Tank Cap - Black - Keep proper pressure in your coolant system - Meyle - Audi Volkswagen Porsche

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

Brand:
Meyle - Corporate Logo
ES#:
3970169
Mfg#:
5Q0121321
Ships on Sep 28, 2026
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2802007 - 1J0121321B - Expansion Tank Cap - Keep proper pressure on your coolant - Rein - Audi Volkswagen Porsche

Keep proper pressure on your coolant 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2802007
Mfg#:
1J0121321B
Ships on Sep 28, 2026
ON SALE!
$10.99

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

$10.44 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2561872 - 1J0121321B - Expansion Tank Cap - Keep proper pressure on your coolant - Meyle - Audi

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#:
2561872
Mfg#:
1J0121321B
Ships on Sep 28, 2026
$7.54 USD
Free Shipping
on orders $49 and up

Expansion Tank

ES#2814304 - 1J0121321B - Expansion Tank - 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#:
2814304
Mfg#:
1J0121321B
Ships in 1 Business Day
ON SALE! SAVE 25%
$4.99

This product was last offered at the strikethrough price on
09-03-2026

$3.76 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#2802152 - 8D0121107C - Expansion Tank Hose - Connects the expansion tank to the hard water pipe - Rein - Audi Volkswagen

Connects the expansion tank to the hard water pipe 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2802152
Mfg#:
8D0121107C
Back Ordered
ON SALE!
$7.63

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

$7.25 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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 1 Business Day
ON SALE! SAVE 10%
$7.99

This product was last offered at the strikethrough price on
09-03-2026

$7.16 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

Expansion Tank Replacement Kit W/ R8 Coolant Cap

ES#2598445 - 8D0121403LR8KT - Expansion Tank Replacement Kit W/ R8 Coolant Cap - Install a brand new expansion tank with a new R8 polished aluminum cap and hardware - Assembled By ECS - Audi Volkswagen

Install a brand new expansion tank with a new R8 polished aluminum cap and hardware 10X Entries Into Our F80 M3 Sweepstakes
From VIN 8D-W-007800, split is in the 1998 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
2598445
Mfg#:
8D0121403LR8KT
Ships in 1 day
$345.99

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

$341.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit

ES#2586882 - 8D0121403DKT - Expansion Tank Replacement Kit - Install a brand new expansion tank with a new cap and hardware - Assembled By ECS - Audi

Install a brand new expansion tank with a new cap and hardware 10X Entries Into Our F80 M3 Sweepstakes
Up to VIN 8D-W-007799, split is in the 1998 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
2586882
Mfg#:
8D0121403DKT
Back Ordered
$59.99

This product was last offered at the strikethrough price on
09-03-2026

$57.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2535174 - 8D0121403D - Coolant Expansion Tank - Includes integrated coolant level sensor - URO - Audi

Includes integrated coolant level sensor 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Up to VIN 8D-W-007799, split is in the 1998 model year

Brand:
URO - Corporate Logo
ES#:
2535174
Mfg#:
8D0121403D
Back Ordered
$17.99 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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