8E0 121 403 : Expansion tank for Volkswagen Passat B5

This expansion tank is intended to replace a faulty component on the Volkswagen Passat B5, in the body variants 3B3 and 3B6 equipped with the 2.0 131 bhp engine (code ALT). An essential part of the cooling circuit, it ensures compensation for variations in coolant volume and maintains stable pressure in the system. As part of the restoration or maintenance of a classic vehicle, its replacement helps prevent overheating risks and preserve engine integrity. A new quality part suited to this model is a guarantee of long-term reliability.