URO 0055421017 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Mercedes-Benz

This URO engine coolant temperature sensor is a direct-fit OE replacement for Mercedes-Benz cooling system and gauge applications. Built for accurate signal transfer and reliable operation, it is a practical choice for restoring proper temperature reading and fan-related sensor function on select Mercedes-Benz models.

Key Features

• Direct-fit OE replacement design for factory-style installation
• 1-terminal sensor configuration
• No wiring harness included
• Alloy conductors help reduce electrical resistance for consistent signal output
• High-quality materials are selected for heat exposure in the engine compartment and cooling system
• Plug-and-play connection for straightforward replacement
• Designed and tested for long service life

Detailed Description

URO part number 0055421017 is an engine coolant temperature sensor engineered for Mercedes-Benz vehicles that use a 1-pole temperature sending unit. It is commonly used in water temperature gauge applications across a wide range of Mercedes-Benz models, including 190E, 300E, 300SE, 300SL, S-Class, SL-Class, and other classic and late-model applications. If you are replacing a worn Mercedes-Benz coolant temperature sender, 0055421017 provides the OE-style fit and electrical characteristics needed for dependable temperature reporting.

This part cross-references Beck/Arnley 201-1528 for the same application.

What It Helps Address

• Inaccurate or erratic coolant temperature gauge readings
• Failed temperature sender signal to the instrument cluster
• Cooling fan sensor function issues caused by a worn sender
• Electrical resistance problems from aged or heat-damaged terminals
• Hard-to-match replacement needs on Mercedes-Benz 1-pin sensor applications

Installation Notes and Tips

• Verify the vehicle uses a 1-pole terminal coolant temperature sender before ordering.
• Inspect the connector and wiring for corrosion or heat damage during replacement.
• Confirm thread style and sealing surface match the original sensor on your Mercedes-Benz.
• Use the listed fitment notes for models such as Mercedes-Benz SL600, S500, 300E, and 190E to confirm application details.

Quality Assurance

URO manufactures this sensor using materials selected to withstand engine bay heat and cooling system conditions. Part number 0055421017 is designed and tested for reliability and long life, and it includes a 24 Month Unlimited Mileage Warranty.