Hotbray PEM100990R Engine Coolant Thermostat

Engine Coolant Thermostat for Discovery

Hotbray PEM100990R is an engine coolant thermostat for select 1999-2004 Land Rover Discovery applications. It is built for direct-fit cooling system service and is identified by part number PEM100990R.

Key Features

• Engine coolant thermostat for cooling system temperature control
• Fits 1999-2004 Land Rover Discovery, N/A
• OE-style replacement application for routine thermostat service
• Weight: 0.65
• Interchanges with PEM100990

Detailed Description

This Hotbray thermostat is used in the cooling system to regulate coolant flow based on engine temperature. For Land Rover Discovery models from 1999 through 2004, PEM100990R supports proper operating temperature control and is a direct replacement option when servicing a worn or sticking thermostat. The part number PEM100990R is also useful when cross-checking catalog listings for the same application.

This part cross-references PEM100990 for the same application.

Common Issues This Part May Solve

• Engine running too cool or taking too long to reach operating temperature
• Overheating caused by a thermostat that is stuck closed
• Temperature fluctuations from inconsistent coolant flow control
• Cooling system service needs on a 1999-2004 Land Rover Discovery

Installation Notes and Tips

Verify the thermostat housing and sealing surfaces before installation. Drain coolant as needed, follow the vehicle service procedure, and confirm the replacement matches the original part number PEM100990R before reassembly. After installation, refill and bleed the cooling system according to Land Rover specifications.

Quality Assurance

Hotbray identifies this thermostat by part number PEM100990R for the listed Discovery fitment. Confirm year, model, and cooling system configuration against the vehicle before ordering.