URO 11531710055 Engine Water Pump O-Ring

Engine Water Pump O-Ring for BMW Cooling Systems

This URO engine water pump O-ring restores the flange seal at the water pump on select BMW applications. It is a direct-fit OE-style replacement for BMW 540i, 740i, 740iL, 750iL, 840Ci, 850Ci, 850CSi, 850i, 530i, M5, X5, and Z8 models that use part number 11531710055.

• Direct-fit OE-style engine water pump O-ring
• High-quality elastomer material for cooling system service
• Built to resist antifreeze exposure and cooling system heat
• Helps restore a proper seal at the water pump flange
• Guaranteed fitment for listed BMW applications
• 24 month unlimited mileage warranty

Detailed Product Information

When the water pump seal hardens, shrinks, or leaks, coolant can escape at the pump flange and reduce cooling system performance. This URO replacement O-ring is made to match the OE-style sealing profile for a straightforward repair on BMW cooling system service. It is a practical choice for BMW 540i and BMW 740i cooling system maintenance, as well as other listed applications using 11531710055.

This part cross-references BMW 11 53 1 710 055 and URO-008393 for the same application.

What This Part Helps Address

• Coolant seepage at the water pump flange
• Loss of sealing after water pump service
• Heat-related hardening of the original O-ring
• Seal deterioration from antifreeze exposure
• Cooling system leaks on BMW 540i, 740i, M5, X5, and related models

Installation Notes and Tips

Inspect the pump flange and sealing surface before installation. Clean all mating surfaces thoroughly, and replace the O-ring during water pump service whenever the original seal shows wear, flattening, or cracking. Verify part number 11531710055 against the vehicle application before installation.

Quality Assurance

URO backs this engine water pump O-ring with a 24 month unlimited mileage warranty. The elastomer construction is selected for long-term exposure to coolant and elevated engine bay temperatures.