Shop Our Clearance Sale - Up To 80% Off FREE SHIPPING on Orders $49+ *exclusions apply

Menu

Call Us330-331-2003 ChatLive Chat Text Us!
0 Shopping Cart
Your Vehicle Clear

Audi C6 S6 V10 5.2L

    • Audi
    • BMW
    • Mercedes Benz
    • MINI
    • Porsche
    • Volkswagen

Saved Vehicles

My Vehicles
You currently have no stored vehicles.

Recent Vehicles

Recent Vehicles Manage Vehicles

You currently have no recent vehicles.

We'll automatically keep fully selected vehicles here for your convenience.

Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
0
Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
Cancel
0
Sales & Specials
Enter Your Vehicle
garage-red
Your Vehicle Audi C6 S6 V10 5.2L
Your Vehicle Audi C6 S6 V10 5.2L
Change Clear

Audi C6 S6 V10 5.2L Coolant Expansion Tank Caps

Sort By
Filter By
Return to Top

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
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4220586
Mfg#:
8E0121321
In Stock at Vendor
ON SALE!
$18.99

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

$18.04 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2091199 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - Genuine Volkswagen Audi - Audi

Plastic pressure cap for expansion tank

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2091199
Mfg#:
8E0121321
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.

$55.99

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

$48.99 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

ES#2598116 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - Calorstat - Audi

Plastic pressure cap for expansion tank

Brand:
Calorstat - Corporate Logo
ES#:
2598116
Mfg#:
8E0121321
Back Ordered
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2872480 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - Febi - Audi

Plastic pressure cap for expansion tank We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2872480
Mfg#:
8E0121321
Ships in 1 Business Day
$11.99

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

$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3970648 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - Meyle - Audi

Plastic pressure cap for expansion tank 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3970648
Mfg#:
8E0121321
Ships on Sep 23, 2026
$9.16 USD
Free Shipping
on orders $49 and up

Expansion Tank Cap

ES#4066648 - 8E0121321 - Expansion Tank Cap - Hamburg Tech - Audi

We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
4066648
Mfg#:
8E0121321
Ships in 1 Business Day
ON SALE! SAVE 16%
$7.99

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

$6.71 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2102281 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - MTC - Audi

Plastic pressure cap for expansion tank

Brand:
MTC - Corporate Logo
ES#:
2102281
Mfg#:
8E0121321
Back Ordered
$5.99 USD
Free Shipping
on orders $49 and up

Expansion Tank Cap

Plastic pressure cap for expansion tank

Brand:
Hudson - Corporate Logo
ES#:
3463373
Mfg#:
8E0121321
Ships in 1-2 days
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings