1K0121407F - Coolant Expansion Tank - Volkswagen Golf MK5/6 & Audi 8P/8J/8U

1K0121407F - Coolant Expansion Tank | Volkswagen Golf MK5/MK6 & Audi 8P/8J/8U

This genuine Volkswagen/Audi coolant expansion tank (part number 1K0121407F) is a direct OEM replacement for a wide range of VW and Audi vehicles, including popular models like the Golf MK5 GTI, Golf MK6 GTI/R, Audi A3 8P, Audi TT 8J, and Audi Q3 8U.

Over time, coolant tanks can become discoloured, brittle, or develop cracks—especially when exposed to high engine temperatures or after a cooling system failure. If you’re replacing your water pump, thermostat, or performing a cooling system overhaul, it’s highly recommended to replace the expansion tank at the same time to ensure reliability.

Features:

• Direct-fit OEM replacement

• Genuine Volkswagen/Audi part

• Restores cooling system appearance and performance

• Clear design to easily monitor coolant level

Fitment Includes:

• Volkswagen Golf MK5 & MK6 – 1.4L, 1.6L, 1.9L, 2.0L, and 3.2L engines (petrol and diesel)

• Audi A3 8P, Audi TT 8J, Audi Q3 8U

Supersedes: 1K0121407A

Perfect for preventative maintenance or restoring your vehicle’s cooling system to OEM standards.

SKU: 1K0121407F