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Audi Cooling Expansion Tank Parts

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Expansion Tank Hose - Upper

ES#315461 - 1K0122447EQ - Expansion Tank Hose - Upper - Replace at the first signs of leakage - Genuine Volkswagen Audi - Audi Volkswagen

Replace at the first signs of leakage Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
For vehicles with FSI engines only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
315461
Mfg#:
1K0122447EQ
Ships on Nov 16, 2026
13% off MSRP

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

$86.99

This product was last offered at the strikethrough price on
10-05-2026

$75.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#4220586 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - Rein - Audi

Plastic pressure cap for expansion tank 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4220586
Mfg#:
8E0121321
In Stock at Vendor
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank Kit

ES#3672037 - 5q0121321KT - Coolant Expansion Tank Kit - Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank replacement kit. - Assembled By ECS - Audi Volkswagen

Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank replacement kit. 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Assembled By ECS - Corporate Logo
ES#:
3672037
Mfg#:
5Q0121321KT
Ships on Nov 20, 2026
ON SALE!
$77.99

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

$73.07 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial 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. Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Porsche - Corporate Logo
ES#:
3615693
Mfg#:
PAB121403
Ships in 5 Business Days
$72.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

T-Fitting - Priced Each

ES#470541 - N90693001 - T-Fitting - Priced Each - 8x8x8 - Replace cracked or broken fittings - Genuine Volkswagen Audi - Audi Volkswagen

8x8x8 - Replace cracked or broken fittings Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
470541
Mfg#:
N90693001
Ships in 5 Business Days
10% off MSRP

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

$19.99

This product was last offered at the strikethrough price on
10-29-2026

$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit - Complete Assembly

ES#3660806 - 8k0121405qKT - Expansion Tank Replacement Kit - Complete Assembly - Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank replacement kit. - Assembled By ECS - Audi

Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank replacement kit. 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Assembled By ECS - Corporate Logo
ES#:
3660806
Mfg#:
8K0121405QKT
In Stock
ON SALE! SAVE 15%
$83.99

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

$71.17 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#436246 - 8E0121403A - Coolant Expansion Tank - Replace your old coolant tank and stop those pesky leaks - Genuine Volkswagen Audi - Audi

Replace your old coolant tank and stop those pesky leaks Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
436246
Mfg#:
8E0121403A
Ships in 4 Business Days
13% off MSRP

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

$81.99

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

$70.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#357501 - 443121321 - Expansion Tank Cap - Keep proper pressure on your coolant - Genuine Volkswagen Audi - Audi Volkswagen

Keep proper pressure on your coolant Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
357501
Mfg#:
443121321
Ships in 4 Business Days
14% off MSRP

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

$79.99

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

$68.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank

ES#5492414 - 5Q0121407A - Expansion Tank - Direct OE-quality replacement coolant reservoir to cure cracked plastic seams, eliminate false "Low Coolant" dash warnings, and prevent catastrophic silicate bag failure. - Febi - Audi Volkswagen

Direct OE-quality replacement coolant reservoir to cure cracked plastic seams, eliminate false "Low Coolant" dash warnings, and prevent catastrophic silicate bag failure. Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Febi - Corporate Logo
ES#:
5492414
Mfg#:
5Q0121407A
Ships on Jan 11, 2027
$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#2206443 - 4G0121109AG - Expansion Tank Hose - Connects the lower radiator hose to the expansion tank - Genuine Volkswagen Audi - Audi

Connects the lower radiator hose to the expansion tank Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2206443
Mfg#:
4G0121109AG
Ships in 1-2 days
13% off MSRP

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

$76.99

This product was last offered at the strikethrough price on
10-26-2026

$66.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rubber Grommet - Priced Each

ES#2530125 - 4G0121585A - Rubber Grommet - Priced Each - Replace your cracked or dried out components - Used in the lower portion of the expansion tank - Genuine Volkswagen Audi - Audi

Replace your cracked or dried out components - Used in the lower portion of the expansion tank Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2530125
Mfg#:
4G0121585A
Ships in 1-2 days
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2762695 - 4F0121403N - Coolant Expansion Tank - Includes integrated coolant level sensor - Behr - Audi

Includes integrated coolant level sensor Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Behr - Corporate Logo
ES#:
2762695
Mfg#:
4F0121403N
In Stock
Limited Qty Sale
$73.99

This product was last offered at the strikethrough price on
08-26-2026

$64.99 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 Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Behr - Corporate Logo
ES#:
3658436
Mfg#:
8K0121403AC
Ships in 2 Business Days
$130.00

This product was last offered at the strikethrough price on
07-23-2026

$64.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2816325 - 8E0121403A - Coolant Expansion Tank - Replace your old coolant tank and stop those pesky leaks - Hamburg Tech - Audi

Replace your old coolant tank and stop those pesky leaks Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2816325
Mfg#:
8E0121403A
Ships in 2 Business Days
$32.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit

ES#2628278 - 8E0121403DKT - 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 Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Assembled By ECS - Corporate Logo
ES#:
2628278
Mfg#:
8E0121403DKT
Ships in 2 Business Days
ON SALE! SAVE 11%
$71.99

This product was last offered at the strikethrough price on
08-26-2026

$63.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit

ES#2649683 - 8E0121403AKT2 - Expansion Tank Replacement Kit - Everything you need to replace your faded, cracked, or leaky expansion tank! - Assembled By ECS - Audi

Everything you need to replace your faded, cracked, or leaky expansion tank! 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Assembled By ECS - Corporate Logo
ES#:
2649683
Mfg#:
8E0121403AKT2
Ships in 1-2 days
ON SALE!
$65.99

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

$63.24 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.

Other Audi Cooling Expansion Tank Parts

Let us help you find the parts that fit your Audi

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Manufacturer names and/or part numbers are used only for identification purposes.

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