Walker 211-2048 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor Overview

Walker 211-2048 is an engine coolant temperature sensor built to report real-time coolant temperature to the ECM. For BMW diesel applications, that signal helps the engine manage fuel delivery, ignition timing, cold-start enrichment, and cooling fan operation with the correct data.

This Sensor Only line focuses on OE-style fit and signal accuracy for direct replacement service on select BMW 328d, 328d xDrive, 535d, 535d xDrive, 540d xDrive, X3, and 740Ld xDrive applications.

Key Features

• Blade terminal type with a 2-terminal female connector
• Oblong connector shape for factory-style fitment
• Direct-fit coolant temperature sensor replacement
• Engineered to match OE resistance values, thermal response, and signal output
• Heat-resistant construction for exposure to coolant, vibration, and temperature swings
• Walker 211-2048 supports accurate ECM temperature input for diesel engine management

Detailed Description

Walker Products 211-2048 is an engine coolant temperature sensor designed to deliver accurate temperature feedback from the cooling system to the ECM. That data is used to adjust fuel injection, ignition timing, cold-start enrichment, and fan operation, making the sensor an important part of drivability and emissions control. The Sensor Only product line is focused on direct replacement parts that integrate with factory systems without modification.

Built to OE specifications, this sensor is suited for BMW diesel models where precise coolant temperature reporting matters. If you are replacing a failed sensor or diagnosing a check engine light, Walker 211-2048 provides a factory-style solution for BMW 328d, BMW 535d, BMW X3, and related applications.

This part cross-references Standard Ignition TX294 for the same application.

What It Helps Address

• Incorrect coolant temperature readings sent to the ECM
• Hard cold starts or extended warm-up behavior
• Rough fuel control caused by inaccurate temperature input
• Cooling fan operation triggered by faulty sensor data
• Check engine light concerns related to coolant temperature sensor failure

Installation Notes and Tips

Verify connector style, terminal count, and sensor location before installation. This Walker coolant temperature sensor uses a blade terminal design with an oblong female connector and no wiring harness included, so the existing harness must be in serviceable condition. Confirm the vehicle application against the listed BMW fitment before replacement.

• Fits 2014-2018 BMW 328d, Sensor Only
• Fits 2014-2018 BMW 328d xDrive, Sensor Only
• Fits 2018 BMW 540d xDrive, Sensor Only
• Fits 2015-2017 BMW X3, Sensor Only
• Fits 2014-2016 BMW 535d, Sensor Only
• Fits 2014-2016 BMW 535d xDrive, Sensor Only
• Fits 2015 BMW 740Ld xDrive, Sensor Only

Quality Assurance

Walker Products engineers this coolant temperature sensor to match OE specifications for resistance, thermal response, and signal output, supporting reliable integration with factory engine management systems.