1J0 121 321B: Expansion tank for Audi A6 (C5)

This expansion tank is a new part intended for the maintenance and restoration of the Audi A6 (C5). It ensures compensation for volume variations of coolant in the circuit, thereby guaranteeing proper thermal functioning of the engine. As part of the overhaul of a classic vehicle, its replacement is often essential to restore a sealed and reliable cooling circuit. An essential part for keeping the Audi A6 (C5) in original condition.