Vaico V10-0890 Radiator Cap

Radiator Cap for VW and Audi Cooling Systems

The Vaico V10-0890 radiator cap is a plastic reservoir cap engineered for select Audi and Volkswagen cooling systems. It is specified with a 1.6 bar pressure rating and compact 80 mm x 40 mm dimensions for OE-style reservoir and expansion tank applications.

Key Features

• Vaico VAICO radiator cap, part number V10-0890
• 1.6 bar pressure rating for the cooling system reservoir
• Black plastic construction
• 80 mm length and 80 mm width with 40 mm height
• Direct replacement style for select Audi A3, Q3, S3, TT Quattro, and Volkswagen Golf, GTI, Jetta, Tiguan applications
• Cross-reference: CALORSTAT by Vernet RC0162

Detailed Description

VAICO V10-0890 is a radiator cap for reservoir and expansion tank locations on select Audi and Volkswagen models. This cap is listed for a wide range of 2009-2017 vehicles, including Audi A3, A3 Quattro, A8 Quattro, Q3, S3, S8, and TT Quattro, plus Volkswagen Beetle, CC, e-Golf, Golf, Golf R, Golf SportWagen, GTI, Jetta, Passat, and Tiguan. It is also referenced against OE numbers 3C0 121 321 and 5Q0121321 for application matching.

Built from plastic and finished in black, the cap measures 80 mm long, 80 mm wide, and 40 mm high. The 1.6 bar pressure specification is important for maintaining proper cooling system pressure at the reservoir or expansion tank, helping the system retain coolant under normal operating conditions.

What It Helps Address

• Coolant loss from a worn or damaged radiator cap seal
• Pressure retention issues in the expansion tank or reservoir
• Cooling system warning signs tied to a weak cap
• Fitment problems when replacing an OE-numbered cap
• Service replacement for Audi and Volkswagen cooling system maintenance

Installation Notes and Tips

Verify the OE number, reservoir location, and pressure rating before installation. This cap is listed for reservoir and expansion tank applications on compatible Audi A3, Q3, S3, TT Quattro, and Volkswagen Golf, GTI, Jetta, Tiguan, and related models. Confirm the cap dimensions match the original part and inspect the sealing surface and tank neck for wear before fitting.

Quality Assurance

VAICO supplies OE-style replacement components for European vehicles, and this V10-0890 radiator cap is cataloged to match the specified OE applications and pressure requirement.