Hella 013113021 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor Overview

Hella 013113021 is a standard replacement engine coolant temperature sensor built for accurate coolant temperature readings and stable cooling system control. With OE-style fitment, a single terminal design, and an M14 x 1.5 thread, it is made for drivers and technicians who need dependable temperature feedback from the cooling system.

Compatible With Mercedes-Benz applications that use this sensor specification, including Mercedes-Benz E-Class and Mercedes-Benz C-Class fitments where the OE part number matches. The Hella 013113021 is also a direct-reference choice for service work that calls for precise coolant temperature monitoring.

Key Features

• Standard replacement engine coolant temperature sensor
• Single terminal / 1-pin design
• Thread size: M14 x 1.5
• 19 mm spanner size / 19.00 head tool size
• Bolt-on / bolted mounting style
• OE-fit construction for service replacement

Detailed Product Description

The Hella 013113021 coolant temperature sensor measures engine coolant temperature and sends that signal to the vehicle’s control system so cooling strategy can be managed accurately. That signal is important for fuel control, fan operation, and temperature-related engine protection. This part number 013113021 is built as a standard replacement and follows the physical dimensions commonly required in OE-style service applications.

This part cross-references Monroe Shocks & Struts (e.g., 32250) for the same application. It also cross-references Four Seasons (e.g., 37465) for the same application. For Mercedes-Benz E-Class and Mercedes-Benz C-Class service jobs, confirming the thread, terminal count, and mounting style is the key step before installation.

What It Helps Address

• Incorrect coolant temperature readings on the dash or scan tool
• Cooling fan operation that does not match engine temperature
• Hard starting or drivability issues tied to temperature input
• Engine management faults related to coolant temperature signal loss
• Replacement of a worn or failed coolant temperature sensor

Installation Notes and Tips

Verify the connector style, 1-pin terminal count, and M14 x 1.5 thread before installation. The sensor uses a bolted mounting style and a 19 mm wrench or spanner size. Because coolant system components can be hot and pressurized, allow the engine to cool fully before service and follow the vehicle manufacturer’s procedure for coolant loss and refill.

Assy/Disassy by Qualified Personnel Required. Confirm application details against the OE reference before ordering, especially on Mercedes-Benz E-Class and Mercedes-Benz C-Class vehicles where multiple sensor variants may exist.

Quality Assurance

Hella is known for OE-focused electrical and thermal management components, and this sensor is engineered for accurate readings and reliable cooling system control in standard replacement service.