Cap Expansion Tank 1.5Bar (Volkswagen Golf IV / Jetta IV / Polo 9N / Audi A3 / TT / Q7) is a pressure cap designed for the expansion tank in specific Volkswagen and Audi models. This component plays a critical role in maintaining the proper pressure within the vehicle’s cooling system, helping to prevent overheating by allowing coolant to expand and escape safely when needed.
This cap is marked at 1.5 bar pressure, which indicates the pressure level it regulates within the expansion tank. It is suited for use on several popular vehicles including Volkswagen Golf IV, Jetta IV, Polo 9N, and Audi A3, TT, and Q7 models. When replacing an expansion tank cap, it is important to compare the pressure rating on the old cap with this one to ensure compatibility with the cooling system’s design specifications.
The expansion tank cap typically fits on the coolant reservoir and functions to release excess pressure by venting coolant safely to avoid damage to the cooling system components. If your vehicle’s cap is worn, cracked, or failing to hold pressure, replacing it with a compatible part like this ensures the cooling system can operate within intended limits.
- Pressure rating: 1.5 bar
- Fits expansion tanks on Volkswagen Golf IV, Jetta IV, Polo 9N, Audi A3, TT, and Q7
- Essential for maintaining cooling system pressure balance
Check the pressure rating and compatibility before purchase, and consider submitting a request for a part or contacting the sales desk for vehicle-specific advice.
Not sure the code, size or specification matches? Use more Fuel Tank or Request a Part with a clear photo of the old part before checkout.