Hella 013113021 Engine Coolant Temperature Sensor for Mercedes-Benz

The Hella 013113021 is a direct-fit OE-quality engine coolant temperature (ECT) sensor designed for Mercedes-Benz applications. This sensor monitors the temperature of the engine coolant and sends a signal to the engine control module (ECM), allowing the ECU to optimize fuel delivery, ignition timing, and emissions control based on operating temperature.

Key Features:

• OE-quality construction engineered to Hella's exacting standards
• Precise temperature measurement for accurate ECM feedback
• Direct-fit replacement — no modifications required
• Manufactured to meet or exceed original equipment specifications
• Helps maintain proper engine performance, fuel efficiency, and cold-start behavior

A failing coolant temperature sensor can trigger a check engine light (DTC), cause rough idling, poor fuel economy, or incorrect gauge readings. The Hella 013113021 restores reliable coolant temperature monitoring, keeping the engine management system operating correctly. Hella is a globally recognized OE supplier trusted by European automakers for decades.