Replacement RJ31800001 Thermostat Housing OEM Cross - C2S11278

The Replacement RJ31800001 is a direct-fit thermostat housing designed as an OEM-quality replacement for the Jaguar X-Type (2002–2008). This housing serves as the mounting point and coolant passage enclosure for the engine thermostat, playing a critical role in maintaining proper engine operating temperature and coolant flow regulation.

Manufactured to match original equipment specifications, this thermostat housing restores proper sealing and structural integrity to the cooling system — helping prevent coolant leaks, overheating, and premature engine wear commonly associated with a cracked or warped factory housing.

Key Features:

• Direct OEM replacement — designed to match original fit, form, and function
• Precision-engineered coolant passages for optimal flow and temperature regulation
• Durable construction to resist heat cycling, corrosion, and coolant degradation
• Replaces OEM part number C2S11278
• Bolt-on installation with no modification required

This thermostat housing is the reliable, cost-effective solution for restoring your Jaguar X-Type cooling system to factory performance. Compatible with the 2002–2008 X-Type model years.