Walker 211-2021 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for BMW and Mini

Walker 211-2021 is an engine coolant temperature sensor built to deliver accurate temperature data to the ECM. That signal helps the engine manage fuel injection, ignition timing, cold start enrichment, and cooling fan operation for consistent drivability.

Walker Sensor Only products focus on the sensor itself for direct replacement service. This Walker coolant temperature sensor is engineered to OE resistance values and signal output for factory-style integration on BMW and Mini applications.

Key Features

• Engine coolant temperature sensor for ECM temperature monitoring
• Pin terminal design with a circular female connector
• 2-terminal configuration for factory-style electrical connection
• Heat-resistant construction for coolant and temperature cycling exposure
• Direct-fit replacement with no modification required
• Walker 211-2021 for BMW 430i, M3, X5, and Mini Cooper applications

Detailed Description

Walker 211-2021 is designed for vehicles that rely on precise coolant temperature input to manage engine operation. By reporting real-time coolant temperature, the sensor supports proper fuel delivery, ignition timing, fan control, and cold-start strategy. It is a direct replacement for many BMW and Mini models, including long-tail applications such as Fits 2021-2023 BMW 330i, Location-Cylinder Head; Sensor Only and Fits 2021-2023 BMW 530i xDrive, Location-Cylinder Head; Sensor Only. This part cross-references Facet 7.3405 and VEMO V20-72-1568 for the same application.

What It Helps Solve

• Incorrect coolant temperature readings sent to the ECM
• Check engine light related to temperature sensor faults
• Hard cold starts or poor cold-start enrichment
• Cooling fan operation issues caused by bad temperature input
• Fuel economy and emissions problems tied to inaccurate engine temperature data

Installation Notes and Tips

Verify the connector shape, terminal count, and sensor location before installation. This unit uses a pin terminal layout, a circular female connector, and no wiring harness. Confirm the vehicle-specific mounting point, especially on BMW models where fitment may be listed at the cylinder head or engine block. For best results, inspect the connector and cooling system condition before replacing the sensor.

Quality Assurance

Walker Products engineers this sensor to match OE resistance values, thermal response, and signal output for reliable factory-system integration. Durable, heat-resistant materials are used to withstand coolant exposure, vibration, and repeated temperature swings.

• Fits 2024-2026 BMW 430i, Sensor Only
• Fits 2021-2023 BMW 330i, Location-Cylinder Head; Sensor Only
• Fits 2021-2023 BMW 530i xDrive, Location-Cylinder Head; Sensor Only
• Fits 2021-2023 BMW M3, Location-Engine Block; Sensor Only
• Fits 2021-2023 Mini Cooper Countryman, Location-Cylinder Head; Sensor Only