Genuine Volkswagen Radiator Cap

Cooling Radiator Cap

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9 Radiator Caps found

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Volkswagen Cap Part Number: 171-121-321-J
$25.09 MSRP: $41.83
You Save: $16.74 (41%)
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Product Specifications
- Other Name: Cover
Fits the following Volkswagen Models:
- Fox | 1987-1993 | Base, GL, GL Sport | 4 Cyl 1.8 L GAS
- Golf | 1985-1992 | Base, GL, GT, GTI, GTI 16-Valve, GTI 8-Valve | 4 Cyl 1.6 L DIESEL, 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS
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Volkswagen Cap Part Number: 5Q0-121-321
$34.80 MSRP: $58.00
You Save: $23.20 (40%)
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Product Specifications
- Other Name: Cover; Cap, Reservoir Cap
- Replaces: 3C0-121-321
Fits the following Volkswagen Models:
- Beetle | 2014-2017 | GSR, R-Line, R-Line S, R-Line SE, R-Line SEL, TDI | 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS
- CC | 2009-2016 | 4 Motion, Executive, Executive 4 Motion, Lux, V6 Executive 4Motion, VR6, VR6 4Motion, VR6 4Motion Executive, VR6 Sport | 6 Cyl 3.6 L GAS
- GTI | 2015-2017 | Autobahn, S, SE, Sport | 4 Cyl 2.0 L GAS
- Golf | 2015-2018 | Base, Launch Edition, S, SE, SEL, TDI S, TDI SE, TDI SEL, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL
- Golf Alltrack | 2017-2019 | S, SE, SEL | 4 Cyl 1.8 L GAS
- Golf R | 2015-2019 | Base | 4 Cyl 2.0 L GAS
- Golf SportWagen | 2015-2019 | Limited Edition, S, SE, SEL, TDI S, TDI SE, TDI SEL | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL
- Jetta | 2014-2018, 2009 | GLI, GLI SE, GLI SEL, Hybrid SEL Premium, S, SE, TDI, Wolfsburg Edition | 4 Cyl 1.4 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 1.4 L GAS, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS
- Passat | 2012-2018, 2006-2008 | 3.6, GT, SE, SEL Premium, VR6 | 6 Cyl 3.6 L GAS
- Tiguan | 2009-2017 | R-Line, S, SE, SEL, Sport, Wolfsburg Edition | 4 Cyl 2.0 L GAS
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Volkswagen Cap Part Number: 1H0-121-321-C
$32.75 MSRP: $54.58
You Save: $21.83 (40%)
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Product Specifications
- Other Name: Cover; Radiator Cap, Reservoir Cap, Reservoir Cover
- Replaces: 1H0-121-321-A, 357-121-321-C
Fits the following Volkswagen Models:
- Cabrio | 1995-2002 | Base, GL, GLS, GLX, High Line | 4 Cyl 2.0 L GAS
- Corrado | 1990-1994 | G60, SLC | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- EuroVan | 1999-2003, 1997, 1995, 1993 | Base, Camper, CL, GL, GLS, MV, Transport | 5 Cyl 2.4 L DIESEL, 5 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS
- Golf | 1990-1999 | Celebration Edition, City, GL, GTI, GTI 16-Valve, GTI 8-Valve, GTI VR6, Jazz, K2, Limited Edition, Sport, Trek, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Jetta | 1985-1999 | Base, Carat, Celebration Edition, City, GL, GLI, GLI 16-Valve, GLS, GLX, GT, Jazz, K2, Limited Edition, TDI, Trek, Wolfsburg Edition | 4 Cyl 1.6 L DIESEL, 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Passat | 1990-1997 | CL, GL, GLS, GLX, TDI | 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Cap Part Number: 1J0-121-422
$3.46 MSRP: $5.68
You Save: $2.22 (40%)
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Fits the following Volkswagen Models:
- Golf | 1999-2006 | GL, GL TDI, GLS, GLS TDI, GTI, GTI 1.8T, GTI 20th Anniversary, GTI 337, GTI GLS, GTI GLX, GTI VR6, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Jetta | 1999-2005 | GL, GL TDI, GLI, GLS, GLS TDI, GLX, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
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Volkswagen Cap Part Number: 1J0-121-321-B
$24.14 MSRP: $39.59
You Save: $15.45 (40%)
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Product Specifications
- Other Name: Cover; Cap
Fits the following Volkswagen Models:
- Touareg | 2007-2010 | Base, TDI, VR6 | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.6 L GAS
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Volkswagen Cap Part Number: 3B0-121-321
$24.14 MSRP: $39.59
You Save: $15.45 (40%)
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Product Specifications
- Other Name: Cover; Cap, Expansion Tank
Fits the following Volkswagen Models:
- Beetle | 2012-2017, 1998-2010 | #PinkBeetle, 2.5, Base, Classic, Denim, Dune, Fleet Edition, GL, GLS, GLS TDI, GLX, GSR, R-Line, R-Line S, R-Line SE, R-Line SEL, S, SE, SEL, Sport, TDI, Turbo, Turbo S, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS
- CC | 2009-2017 | Executive, Lux, Lux Limited, Lux Plus, Luxury, R-Line, R-Line Executive, Sport, Sport Plus, Trend | 4 Cyl 2.0 L GAS
- Eos | 2007-2016 | 2.0T, 3.2, Base, Executive, Final Edition, Komfort, Lux, Sport, Turbo, VR6 | 4 Cyl 2.0 L GAS, 6 Cyl 3.2 L GAS
- GTI | 2006-2014 | Base, Driver's Edition, Fahrenheit, Wolfsburg Edition | 4 Cyl 2.0 L GAS
- Golf | 2010-2014, 1999-2006 | Base, GL, GL TDI, GLS, GLS TDI, GTI, GTI 1.8T, GTI 20th Anniversary, GTI 337, GTI GLS, GTI GLX, GTI VR6, TDI, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS
- Golf R | 2012-2013 | Base | 4 Cyl 2.0 L GAS
- Jetta | 1999-2018 | 2.0T, 2.5, Base, GL, GL TDI, GLI, GLI SE, GLI SEL, GLS, GLS TDI, GLX, Hybrid, Hybrid SE, Hybrid SEL, Hybrid SEL Premium, S, SE, SE Sport, SEL, SEL Premium, Sport, TDI, TDI Cup Edition, TDI Premium, TDI S, TDI SE, TDI SEL, Value Edition, Wolfsburg Edition | 4 Cyl 1.4 L FULL HYBRID EV-GAS (FHEV), 4 Cyl 1.4 L GAS, 4 Cyl 1.8 L GAS, 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS
- Passat | 2012-2019, 1998-2010 | 2.0T, 4 Motion, GL, GL TDI, GLS, GLS 4 Motion, GLS TDI, GLX, GLX 4 Motion, GT, Komfort, Limited Edition, Lux, R-Line, S, SE, SE R-Line, SEL, SEL Premium, Sport, TDI SE, TDI SEL, TDI SEL Premium, Turbo, Value Edition, Wolfsburg Edition | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.6 L GAS
- R32 | 2008 | Base | 6 Cyl 3.2 L GAS
- Rabbit | 2006-2009 | 2.5, S | 5 Cyl 2.5 L GAS
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Volkswagen Cap Part Number: 1H0-121-422
$6.98 MSRP: $11.44
You Save: $4.46 (39%)
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Product Specifications
- Other Name: Cover, Reservoir Bolt
Fits the following Volkswagen Models:
- Corrado | 1992-1994 | SLC | 6 Cyl 2.8 L GAS
- Golf | 1993-1998 | Celebration Edition, City, GL, GTI, GTI VR6, Jazz, K2, Limited Edition, Sport, Trek | 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Jetta | 1993-1999 | Celebration Edition, City, GL, GLS, GLX, GT, Jazz, K2, Limited Edition, TDI, Trek, Wolfsburg Edition | 4 Cyl 1.9 L DIESEL, 4 Cyl 2.0 L GAS, 6 Cyl 2.8 L GAS
- Passat | 1995-1997 | GLX | 6 Cyl 2.8 L GAS
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Volkswagen Cap Part Number: 1C9-121-321
$39.95 MSRP: $55.48
You Save: $15.53 (28%)
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Product Specifications
- Other Name: Cover; Reservoir Cap
Fits the following Volkswagen Models:
- Passat | 2002-2004 | W8 | 8 Cyl 4.0 L GAS
- Touareg | 2006-2009 | Base, TDI | 10 Cyl 5.0 L DIESEL, 8 Cyl 4.2 L GAS
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Volkswagen Radiator Cap Part Number: 7B0-121-321-A
$16.69 MSRP: $22.80
You Save: $6.11 (27%)
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Product Specifications
- Other Name: Cover
- Replaces: 7B0-121-321
Fits the following Volkswagen Models:
- Routan | 2009-2014 | S, SE, SEL, SEL Premium | 6 Cyl 3.6 L FLEX, 6 Cyl 3.8 L GAS, 6 Cyl 4.0 L GAS

Volkswagen Radiator Cap

The Volkswagen Radiator Cap maintains engine temperatures by sealing coolant under precise pressure and releasing excess heat when necessary. The brand started with the dream of a reliable people car in 1937, and today, the brand continues to value smart design from TSI turbo engines to digital cockpits and the MQB platform, which is modular, cuts weight and cost. Drivers love VW models like the legendary Beetle, the adaptable Type 2 van and forward-looking ID electric lineup because each has balanced performance, solid build quality and simple styling that remains fresh for decades. Touchscreen MIB infotainment, head-up displays and park assist systems are indicators of how VW is conflating comfort and technology while still instilling the fun-to-drive spirit that made the Beetle famous. Just as the cars change, the Radiator Cap remains essential throughout the range. This small device holds roughly 16 PSI, raising the boiling point of the coolant so that liquid is smoothly able to flow during long climbs or city traffic. When the pressure becomes too high, the Radiator Cap creates a channel to an overflow bottle, which then creates a vacuum on cooldown to pull fluid back, thus keeping the system full and free of air. By preventing steam pockets and leaks, it protects aluminum heads and ensures every VW engine runs efficiently mile after mile.

Buying OEM parts is a smart move to keep your long-term repair costs low. These components are built to last because VW uses such strict factory standards. At VWPartsGiant.com, it is easy to find genuine Volkswagen Radiator Cap at prices that actually beat the competition. You get a real manufacturer's warranty with every single part, so you know your purchase is safe. Plus, forget about return headaches since our policy is easy and worry-free. We ship your order fast, too. If you have questions, our team of parts experts is ready to help. Why wait? Start shopping now!