InMotion WU4103 Engine Water Pump

Engine Water Pump for Ford and Mercury

The InMotion WU4103 engine water pump is built for direct-fit cooling system service on select Ford and Mercury applications. It uses a precision-machined impeller to promote steady coolant circulation, helping maintain engine temperature control in demanding driving conditions.

Fits 2001-2004 Ford Mustang, N/A. Fits 1996-1998 Ford Mustang, N/A. Fits 1996-1997 Ford Thunderbird, N/A. Fits 1996-1997 Mercury Cougar, N/A.

• Precision-machined impeller for consistent coolant flow
• High-quality bearings and seals for smooth operation
• Leak-resistant design for cooling system reliability
• Corrosion-resistant housing for long service life
• OEM-style fit for straightforward replacement

Detailed Product Overview

InMotion WU4103 is an engine water pump replacement for Ford Mustang, Ford Thunderbird, and Mercury Cougar applications listed in the fitment data. It is engineered to move coolant efficiently through the engine and radiator circuit, helping the cooling system maintain stable operating temperatures. The corrosion-resistant housing and sealed bearing design support dependable operation in everyday driving and harsh underhood conditions. This part number, WU4103, is a practical choice when replacing a worn or leaking pump on a Mustang or other listed vehicle.

Common Cooling System Issues

• Coolant leakage from a worn pump seal
• Overheating caused by reduced coolant circulation
• Noise from failing pump bearings
• Temperature fluctuation from inefficient impeller performance
• Cooling system wear on higher-mileage Ford Mustang, Thunderbird, or Mercury Cougar vehicles

Installation Notes

Verify engine application and gasket surface condition before installation. Drain the cooling system, inspect related hoses and thermostat components, and follow the vehicle service procedure for torque and refill specifications. Confirm the replacement matches the original pump configuration for your Ford Mustang, Ford Thunderbird, or Mercury Cougar before assembly. Part number WU4103 should be checked against the removed unit for final fitment confirmation.

Quality Assurance

InMotion positions this water pump as a durable replacement built with quality bearings, seals, and a corrosion-resistant housing for reliable cooling system service.