URO MJA4440BA Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for Jaguar

The URO MJA4440BA engine coolant reservoir cap is a direct-fit replacement for select Jaguar cooling systems. It is precision-molded to OE cap dimensions for compatibility with original and aftermarket coolant recovery tanks, with materials selected to handle engine heat and demanding coolant conditions.

• Fits select Jaguar X-Type, XK8, XKR, Vanden Plas, XJ8, and XJR applications
• 1.0 bar pressure rating on listed applications
• OE-style dimensions for proper tank compatibility
• Heat-resistant cap and seal materials
• Factory pressure-tested for cooling system use
• URO MJA4440BA replacement cap

Fitment Details

• Fits 2008 Jaguar X-Type, N/A
• Fits 2002-2007 Jaguar X-Type, N/A, 1.0 Bar
• Fits 1997-2006 Jaguar XK8, N/A, 1.0 Bar
• Fits 2000-2006 Jaguar XKR, N/A, 1.0 Bar
• Fits 1998-2003 Jaguar Vanden Plas, N/A, 1.0 Bar
• Fits 1998-2003 Jaguar XJ8, N/A, 1.0 Bar
• Fits 1998-2003 Jaguar XJR, N/A, 1.0 Bar

What This Cap Helps Address

• Coolant loss from a cap that no longer seals correctly
• Pressure retention issues in the expansion tank
• Cracked, worn, or heat-damaged reservoir cap seals
• Cooling system warning lights related to low coolant level
• Fitment problems with incorrect aftermarket cap dimensions

Installation Notes

Verify the reservoir neck style and pressure rating before installation. Inspect the tank sealing surface for damage, clean the mating area, and confirm the cap seats fully and locks in place. This part cross-references URO-007938 and 118 26017 613 for the same application.

Quality Assurance

URO MJA4440BA is factory pressure-tested and backed by a 24 Month Unlimited Mileage Warranty. It is built to OE cap dimensions to support proper fitment on listed Jaguar cooling system applications.