Radiator Coolant Reservoir for A3 A4 A5 Q5 A6 A7 Q7 RS4 RS6 S4 S5 S6 for TT 3B0121321 Coolant Recovery Expansion Water Tank Bottle Cap Cover Pot Lid

Restore proper cooling system pressure and help protect your engine with this Coolant Reservoir Cap. Designed as a reliable replacement for loose, cracked, or leaking coolant caps, it helps reduce coolant leaks, coolant overflow, coolant smell, and engine overheating issues caused by poor sealing performance.

• Helps maintain a tight coolant system pressure seal to reduce coolant leaks and pressure loss.
• Helps reduce coolant overflow, evaporation, and coolant smell caused by loose or damaged caps.
• Prevents dirt, moisture, and debris from entering the coolant reservoir for improved system protection.
• Direct replacement design installs easily in seconds with no tools or complicated procedures required.
• Please verify the part number, connector type, and switch configuration before purchase to ensure compatibility with your vehicle.