Rein AJ814048 Engine Coolant Thermostat Kit with Housing and Gasket

The Rein AJ814048 is a complete engine coolant thermostat kit engineered to restore proper thermal management to Jaguar and Land Rover vehicles equipped with the 3.0L supercharged V6 (AJ126) engine. This kit provides everything needed for a thorough thermostat service in a single package.

What's Included:

• Engine coolant thermostat
• Thermostat housing
• Sealing gasket

How It Works:

• The thermostat valve closes when the engine is cold, keeping coolant circulating within the engine block until operating temperature is reached
• Once optimal temperature is achieved, the valve opens to route coolant through the radiator for cooling before returning to the engine
• A wax pellet mechanism actuates the valve — melting and expanding to open, then contracting to close

When to Replace:

• Engine overheating or running consistently below normal operating temperature
• Poor fuel economy or increased emissions related to temperature regulation issues
• Thermostat valve stuck open or closed
• As a precaution whenever major cooling system work is performed

OEM Cross-Reference: AJ814048

Rein Automotive is a trusted supplier of premium European vehicle replacement parts. This thermostat kit is manufactured to meet or exceed OEM specifications, ensuring a precise fit and reliable long-term performance.