Hella 009107251 Engine Coolant Temperature Sensor

Mercedes-Benz Coolant Temperature Sensor

This Hella engine coolant temperature sensor monitors coolant temperature for Mercedes-Benz applications that use a 12V, 1-pin, bolted sensor with a seal. Part number 009107251 is a direct-fit style replacement for select Mercedes-Benz C200 and SL60 AMG models.

• Hella engine coolant temperature sensor
• Part number 009107251
• NTC sensor design for temperature-based resistance signal output
• 12V rated voltage
• 1 connector / 1-pin configuration
• Bolted mounting type with seal included
• M14x1.5 thread size
• Black housing
• Resistance: 628 Ohm
• Temperature range: 80°C

Detailed Product Overview

Built for Mercedes-Benz coolant temperature monitoring, this Hella sensor uses an NTC sensing element to report coolant temperature changes to the engine management system. The bolted design, M14x1.5 thread, and included seal support a secure installation on the specified applications. Use part number 009107251 when sourcing a replacement coolant temperature sensor for Mercedes-Benz C200 and Mercedes-Benz SL60 AMG vehicles.

This part cross-references VEMO V30-72-0083 for the same application.

Vehicle Fitment

• Fits 2001 Mercedes-Benz C200, N/A, 12V - 1-Pin Connector - Bolted - with Seal
• Fits 1997-1999 Mercedes-Benz SL60 AMG, N/A, 12V - 1-Pin Connector - Bolted - with Seal

Common Symptoms This Sensor May Address

• Incorrect coolant temperature readings
• Hard starting when the engine is cold
• Rough idle related to inaccurate temperature input
• Cooling fan operation triggered at the wrong time
• Check engine light tied to coolant temperature signal faults

Installation Notes

Confirm the connector count, thread size, and mounting style before installation. This sensor uses a bolted mount with a seal and a single electrical connector, so the replacement should match the original configuration on the vehicle. Verify the coolant system is properly depressurized and the sealing surface is clean before fitting the sensor.

Quality Assurance

Hella is an established automotive parts brand with OE-level application coverage across many European vehicles. Part number 009107251 is specified for Mercedes-Benz coolant temperature sensor applications and should be matched to the vehicle’s original sensor configuration before installation.