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Audi Cooling Expansion Tank Parts

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Expansion Tank Hose

ES#2536961 - 8K0121081T - Expansion Tank Hose - Connects the expansion tank to the throttle body union - Genuine Volkswagen Audi - Audi

Connects the expansion tank to the throttle body union

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2536961
Mfg#:
8K0121081T
Ships in 1-2 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.

$115.00

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

$103.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank With Cap

ES#5372166 - 8K0121403ACC - Coolant Expansion Tank With Cap - Plastic reservoir for the coolant system - Rein - Audi Porsche

Plastic reservoir for the coolant system 2X Entries Into Our F80 M3 Sweepstakes

Brand:
Rein - Corporate Logo
ES#:
5372166
Mfg#:
8K0121403ACC
In Stock
ON SALE!
$41.99

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

$39.89 USD
Free Shipping
on orders $49 and up

Coolant Expansion Tank

ES#2557238 - 8T0121405 - Coolant Expansion Tank - Coolant level sensor enclosed in tank - Genuine Volkswagen Audi - Audi

Coolant level sensor enclosed in tank

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2557238
Mfg#:
8T0121405
Ships in 3 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.

$280.00

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

$252.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4148659 - 80A121405AQ - Coolant Expansion Tank - See your coolant levels clearly again, comes with coolant level sensor - Genuine Volkswagen Audi - Audi

See your coolant levels clearly again, comes with coolant level sensor For vehicles with model year up through 2020 (engine code DJYA)

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4148659
Mfg#:
80A121405AQ
Ships in 1-2 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.

$271.99

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

$244.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank Cap

ES#5340291 - 4M0121321Q - Coolant Expansion Tank Cap - Keep proper pressure in your coolant system - Hamburg Tech - Audi

Keep proper pressure in your coolant system

Brand:
Hamburg Tech - Corporate Logo
ES#:
5340291
Mfg#:
4M0121321Q
In Stock
ON SALE! SAVE 20%
$35.99

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

$28.79 USD
Free Shipping
on orders $49 and up

Coolant Expansion Tank Overflow Hose

ES#1268944 - 8K0121164R - Coolant Expansion Tank Overflow Hose - The hose that leads from the radiator to the expansion tank - Genuine Volkswagen Audi - Audi

The hose that leads from the radiator to the expansion tank

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1268944
Mfg#:
8K0121164R
In Stock
10% off MSRP

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

$133.99

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

$120.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#4163739 - 80A121405AG - Coolant Expansion Tank - See your coolant levels clearly again, comes with coolant level sensor - Genuine Volkswagen Audi - Audi

See your coolant levels clearly again, comes with coolant level sensor For vehicles with model year from 2021+ (engine code DPVA)

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4163739
Mfg#:
80A121405AG
Ships in 1-2 days
1% off MSRP

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

$160.00

This product was last offered at the strikethrough price on
05-01-2026

$157.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit

ES#2592613 - 1K0121407AKT3 - Expansion Tank Replacement Kit - Everything in one kit to replace your coolant expansion tank - Assembled By ECS - Audi

Everything in one kit to replace your coolant expansion tank 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2592613
Mfg#:
1K0121407AKT3
In Stock
ON SALE! SAVE 25%
$32.99

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

$24.67 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#352880 - 420121403 - Coolant Expansion Tank - Coolant level sensor enclosed in tank - Genuine Volkswagen Audi - Audi

Coolant level sensor enclosed in tank

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
352880
Mfg#:
420121403
Ships in 1-2 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.

$511.99

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

$460.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expanding Nut - Priced Each

ES#422162 - 811807577C - Expanding Nut - Priced Each - Install new hardware with your new parts. - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. Used in securing the coolant expansion tank

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
422162
Mfg#:
811807577C
In Stock
$2.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Replacement Kit

ES#2637204 - 8E0121403FKT2 - 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

Brand:
Assembled By ECS - Corporate Logo
ES#:
2637204
Mfg#:
8E0121403FKT2
Ships on Oct 6, 2026
ON SALE! SAVE 14%
$62.99

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

$54.44 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#1910119 - 8E0121403F - Coolant Expansion Tank - Coolant level sensor enclosed in tank - Vaico - Audi

Coolant level sensor enclosed in tank We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
1910119
Mfg#:
8E0121403F
In Stock
$75.99

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

$47.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3249999 - 4S0121403B - Coolant Expansion Tank - Everything you need to replace your faded, cracked, or leaky expansion tank! - Genuine Volkswagen Audi - Audi

Everything you need to replace your faded, cracked, or leaky expansion tank!

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3249999
Mfg#:
4S0121403B
Ships in 3 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.

$231.99

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

$208.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Hose

ES#390027 - 4F0121107CC - Expansion Tank Hose - Connects the upper radiator hose and coolant flange to the expansion tank - Genuine Volkswagen Audi - Audi

Connects the upper radiator hose and coolant flange to the expansion tank

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
390027
Mfg#:
4F0121107CC
Ships in 1-2 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.

$113.99

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

$102.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank Hose

ES#4809603 - 8K0121081AH - Coolant Expansion Tank Hose - Located between the coolant expansion tank and the cylinder head coolant flange - Rein - Audi

Located between the coolant expansion tank and the cylinder head coolant flange 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4809603
Mfg#:
8K0121081AH
Ships in 4 Business Days
ON SALE!
$53.99

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

$51.29 USD
Free Shipping
on orders $49 and up

Plastic Coolant Hose

ES#3212553 - 80A121081S - Plastic Coolant 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#:
3212553
Mfg#:
80A121081S
Ships in 1-2 days
9% off MSRP

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

$106.99

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

$96.99 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.

Other Audi Cooling Expansion Tank Parts

Let us help you find the parts that fit your Audi

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