URO 420-121-403 Coolant Expansion Tank

The URO 420-121-403 Coolant Expansion Tank is an OEM-quality replacement component designed to restore proper cooling system function. This expansion tank provides a safe reservoir for coolant as it expands and contracts during normal temperature cycles, preventing pressure buildup and maintaining optimal engine cooling.

Key Features:

• Direct OEM replacement for damaged or leaking expansion tanks
• Constructed from durable high-temperature resistant plastic
• Includes integrated coolant level sensor housing
• Manufactured to factory specifications for precise fit
• ISO/IATF 16949 certified quality standards

Expansion tanks are subjected to extreme temperature changes and can develop cracks, broken mounting points, or damaged fittings over time. Symptoms of a failing expansion tank include coolant leaks, low coolant warnings, or visible damage to the tank body. Replacement ensures your cooling system maintains proper pressure and prevents coolant loss that can lead to engine overheating.