Walker 211-1090 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Mercedes-Benz

Walker 211-1090 is an engine coolant temperature sensor built to report coolant temperature data to the ECM in real time. For Mercedes-Benz E320, C220, C280, C36 AMG, S320, and SL320 applications, this sensor supports accurate fuel delivery, ignition timing, cold-start enrichment, and cooling fan control.

The Walker Sensor Only line focuses on direct replacement sensor components engineered to match OE resistance values, thermal response, and signal output. Part number 211-1090 uses a circular female connector with four terminals, including pressure-contact terminal design for factory-style electrical connection.

Key Features

• Engine coolant temperature sensor for ECM temperature input
• Direct-fit replacement for factory-style installation
• OE-matched resistance values, thermal response, and signal output
• Heat-resistant construction for coolant and vibration exposure
• Circle connector shape with 4 terminals
• Female connector with male terminals and pressure-contact terminal type

Detailed Product Overview

Walker Products 211-1090 is designed for vehicles that rely on precise coolant temperature feedback to manage engine operation. By sending accurate temperature data to the ECM, the sensor helps the system adjust fuel injection, ignition timing, cold-start enrichment, and radiator fan operation. This makes it a practical replacement choice when diagnosing temperature-related drivability concerns on Mercedes-Benz E320 and related models.

This part cross-references Beck/Arnley 158-1034 and Four Seasons 33280 for the same application. The Walker Sensor Only product line is focused on replacement sensors that integrate with factory systems without modification, making it a straightforward option for technicians and DIY repairs alike.

What It Helps Address

• Check engine light related to coolant temperature signal faults
• Incorrect fuel mixture caused by inaccurate temperature readings
• Hard cold starts or extended warm-up behavior
• Cooling fan operation issues tied to temperature input
• Rough idle or drivability problems after engine warm-up

Installation Notes and Tips

Verify connector shape, terminal count, and sensor location before installation. This Walker 211-1090 coolant temperature sensor is a direct-fit style part, so it installs without modification when matched to the correct application. Confirm the vehicle uses the listed circular 4-terminal female connector configuration before replacement.

Quality Assurance

Walker Products engineers this sensor to OE specifications for resistance, thermal response, and signal output. Durable, heat-resistant materials are used to withstand constant coolant exposure, vibration, and temperature swings in normal engine operation.