Beck Arnley 143-0903 Engine Coolant Thermostat

Engine Coolant Thermostat Overview

Beck Arnley 143-0903 is an engine coolant thermostat built to meet foreign nameplate OE specifications for form, fit, and function. It is specified at 188 degrees and does not include the housing.

Compatible With Mercedes-Benz applications including E350, GL350, R350, Sprinter 2500, Sprinter 3500, ML350, GL320, ML320, and R320 models. Use this thermostat when you need a direct replacement for a 188-degree cooling system application.

Key Features

• 188-degree temperature rating for specified cooling system operation.
• Thermostat only; housing is not included.
• Built to OE specifications for foreign nameplate applications.
• Beck Arnley part number 143-0903 for catalog matching and service lookup.

Detailed Description

Beck Arnley 143-0903 is an engine coolant thermostat for Mercedes-Benz cooling system service. The 188-degree calibration matches the listed applications and helps maintain proper coolant flow control once operating temperature is reached. This part number 143-0903 is listed for E350, GL350, R350, Sprinter 2500, Sprinter 3500, ML350, GL320, ML320, and R320 models across the specified years.

Beck Arnley focuses on foreign nameplate replacement parts that follow OE specifications for form, fit, and function. That makes this thermostat a practical choice when replacing a worn or inaccurate thermostat in Mercedes-Benz E350, ML350, or Sprinter cooling system service.

What This Part Helps Address

• Engine running too cool or too warm due to thermostat wear.
• Delayed coolant flow control during warm-up.
• Temperature regulation issues tied to a failed thermostat.
• Cooling system service where the housing remains in use.

Installation Notes and Tips

Verify the 188-degree specification against the vehicle application before installation. Inspect the thermostat housing and sealing surfaces for wear, corrosion, or damage since the housing is not included. Confirm the part number 143-0903 and match the vehicle year, model, and cooling system requirements before service.

Quality Assurance

Beck Arnley parts are sourced to meet foreign nameplate OE specifications for form, fit, and function. The brand works with global sourcing partners to help ensure the correct replacement part is selected for the application.