Select your vehicle

  1. Home
  2. Audi
  3. Expansion Tank Cap

Audi Expansion Tank Cap Parts
OE
Audi R8 Coolant Cap - OE Supplier 420121321

Audi R8 Coolant Cap - OE Supplier 420121321

R8 Expansion Tank Upgrade
R8
OE Supplier
Available
Ships in 2 business days
Ships Free
$51.99
OEM
Audi VW Expansion Tank Cap - Rein CPE0039

Audi VW Expansion Tank Cap - Rein CPE0039

Arteon, Atlas, Atlas Cross Sport, Golf, & more
Rein
1 Rating
Available
In Stock
$13.79
OEM
Audi Porsche VW Expansion Tank Cap - Rein CPE0024P

Audi Porsche VW Expansion Tank Cap - Rein CPE0024P

A4, A4 Quattro, A6, A6 Quattro, Allroad Quattro, Cayenne, Panamera, & more
Rein
2 Ratings
Available
In Stock
$11.29
Audi VW Expansion Tank Cap - Febi-Bilstein 103522

Audi VW Expansion Tank Cap - Febi-Bilstein 103522

Arteon, Atlas, Atlas Cross Sport, Golf, & more
Febi Bilstein
Available
In Stock
$11.39
Audi Expansion Tank Cap - Febi Bilstein 8E0121321

Audi Expansion Tank Cap - Febi Bilstein 8E0121321

A4, A4 Quattro, A6, A6 Quattro, A7 Quattro, & more
Febi Bilstein
2 Ratings
Available
In Stock
$10.09
Audi Porsche VW Expansion Tank Cap - Febi-Bilstein 40722

Audi Porsche VW Expansion Tank Cap - Febi-Bilstein 40722

A4, A4 Quattro, A5, A5 Quattro, Beetle, Eos, Macan, & More
Febi Bilstein
13 Ratings
Available
In Stock
$9.19
Expansion Tank Cap - Febi Bilstein 443121321

Expansion Tank Cap - Febi Bilstein 443121321

100, 100 Quattro, 200, 200 Quattro, 4000, & more
100, 100 Quattro, 200, 200 Quattro, 4000, & more
Febi Bilstein
1 Rating
Available
Ships in 1 business day
$7.99
Audi Porsche VW Expansion Tank Cap - Meyle 1001210049

Audi Porsche VW Expansion Tank Cap - Meyle 1001210049

A4, A4 Quattro, A6, A6 Quattro, Allroad Quattro, Cayenne, & more
Meyle
8 Ratings
Available
In Stock
$6.59
VW Expansion Tank cap - Meyle 1001210042

VW Expansion Tank cap - Meyle 1001210042

Quattro, S8, Coupe, A6, A4 Quattro, & more
Meyle
Available
Ships in 2-3 weeks
$6.59
Audi VW Expansion Tank Cap - URO Parts 008068

Audi VW Expansion Tank Cap - URO Parts 008068

A4, A4 Quattro, A5, A5 Quattro, Beetle, Eos, Macan, & More
URO Parts
Available
In stock
$5.39
Audi R8 Coolant Cap - Genuine Audi 420121321

Audi R8 Coolant Cap - Genuine Audi 420121321

R8 Expansion Tank Upgrade
R8
Genuine Audi
Available
Ships in 3 business days
Ships Free
$295.99
Audi Engine Coolant Reservoir Cap - Genuine VW Audi 4M0121321Q

Audi Engine Coolant Reservoir Cap - Genuine VW Audi 4M0121321Q

1.6 bar
A4, A4 Quattro, A5 Quattro, A5 Sportback, & More
Genuine VW Audi
Available
In stock
Ships Free
$54.65
Audi VW Coolant Expansion Tank Cap - Genuine Audi VW 1C9121321

Audi VW Coolant Expansion Tank Cap - Genuine Audi VW 1C9121321

Passat, Q7, Touareg
Genuine VW Audi
Available
Ships in 3 business days
Ships Free
$53.99
Audi Expansion Tank Cap - Genuine Audi 8E0121321

Audi Expansion Tank Cap - Genuine Audi 8E0121321

A4, A4 Quattro, A6, A6 Quattro, A8 Quattro, S4, S6, S8
Genuine Audi
3 Ratings
Available
In Stock
$40.60
Audi VW Expansion Tank Cap - Genuine VW Audi 2Q0121321A

Audi VW Expansion Tank Cap - Genuine VW Audi 2Q0121321A

Arteon, Atlas, Atlas Cross Sport, Golf, & more
Genuine VW Audi
Available
In Stock
$32.88
Audi Porsche VW Expansion Tank Cap - Genuine VW Audi 3B0121321

Audi Porsche VW Expansion Tank Cap - Genuine VW Audi 3B0121321

A4, A4 Quattro, A5, A5 Quattro, Beetle, Eos, Macan, & More
Genuine VW Audi
4 Ratings
Available
In Stock
$28.36
Audi Engine Coolant Reservoir Cap - Genuine Audi 4M0121321R

Audi Engine Coolant Reservoir Cap - Genuine Audi 4M0121321R

1.6 bar
A4 Quattro, A4 allroad, A5 Quattro, A5 Sportback, & More
Genuine Audi
Available
In Stock
$22.29
Audi VW Engine Coolant Reservoir Cap - Genuine Audi VW 8J0121324

Audi VW Engine Coolant Reservoir Cap - Genuine Audi VW 8J0121324

S4
Genuine VW Audi
Available
Ships in 3 business days
$7.39
Audi Engine Coolant Reservoir Cap - Genuine Audi 8K0129697

Audi Engine Coolant Reservoir Cap - Genuine Audi 8K0129697

Position 12 in the Diagram
A5 Quattro
Genuine Audi
Available
In Stock
$5.09
OEM
Audi VW Coolant Expansion Tank Cap - Calorstat 1C9121321

Audi VW Coolant Expansion Tank Cap - Calorstat 1C9121321

Passat, Q7, Touareg
Calorstat
Unavailable
No Longer Available
$13.19
Audi VW Expansion Tank Cap - Meyle 1001210070

Audi VW Expansion Tank Cap - Meyle 1001210070

Arteon, Atlas, Atlas Cross Sport, Golf, & more
Meyle
Not available
This product is not available for sale
$15.59

Get help answering any questions you have

Contact Us
Special offers, news, & promos
© FCP Euro 2026. All rights reserved.  
Version: 93b90cc5d : 53a503b7d08d6a1584b68d28b71f3ec1f789121f