Engine Coolant Expansion Reservoir Overflow Tank For Audi A3 Q3 TT RS TTS Quattro And VW Beetle Eos Golf R GTI Jetta Passat CC Rabbit Tiguan Replacement OE 603253 1K0121407A Plug And Play Easy Install No Fuss Premium Quality
✔️ Plug-and-play install, OE 603253 compatible, white tank
The coolant expansion reservoir is a direct replacement part designed for select Audi and VW models. It stores excess coolant, helps maintain cooling system pressure, and allows you to check antifreeze level without removing the radiator cap. OE numbers include 603253 and 1K0121407A, with a white PP housing for durability.
✅ 100% brand new OE-grade replacement
✅ Made from premium PP material for heat resistance and durability
✅ OE-compatible numbers: 603253, 1K0121407A for easy cross-reference
✅ Helps prevent coolant leaks and oil dilution in the engine bay
✅ Clear sight window allows antifreeze level check without removing radiator cap
💡 What is a coolant reservoir used for in a car cooling system? A handy component that stores excess coolant and accommodates expansion as the engine warms. - Handy for maintaining coolant level and system pressure - Lets you inspect antifreeze without removing the radiator cap - Helps prevent overheating and reduces oil dilution in the engine