Hella 009309221 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Mini Cooper

Hella 009309221 is an engine coolant temperature sensor built with a 12V NTC sensing element and a plugged mounting design. It uses 2 connectors, includes a seal and retaining ring, and is finished in green to match the original part color.

Compatible with 2007-2010 Mini Cooper and 2011-2012 Mini Cooper applications, this Hella coolant temperature sensor supports accurate engine temperature reporting for the cooling system and engine management strategy. The Hella line is used for OE-style electrical and thermal components, and part number 009309221 is a direct reference for this sensor application.

Key Features

• Engine coolant temperature sensor, Hella part number 009309221
• NTC sensor type for temperature-dependent resistance signal output
• 12V rated voltage with 2 electrical connectors
• Plugged mounting type for the listed Mini Cooper applications
• Includes seal and retaining ring
• Green housing matches the original part color

Detailed Description

This engine coolant temperature sensor monitors coolant temperature and sends the signal used by the vehicle’s control system to manage engine operation. For Mini Cooper models from 2007-2010 and 2011-2012, Hella 009309221 is specified with an included O-ring in fitment notes and is listed for N/A position applications. This part cross-references Beck/Arnley 158-1693 and NTK EF0045 for the same application.

What It Helps Address

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting or rough running related to temperature signal errors
• Cooling fan behavior triggered by inaccurate sensor input
• Fuel mixture and idle issues tied to coolant temperature data
• Check engine light conditions related to coolant temperature sensor faults

Installation Notes and Tips

Verify connector style, mounting type, and sensor location before installation. This sensor is a plugged design with 2 connectors and is listed with seal and retaining ring details; confirm the original part color and fitment notes for your Mini Cooper before replacement. Clear diagnostic trouble codes after installation and recheck coolant level and system operation.

Quality Assurance

Hella 009309221 is an OE-style replacement sensor from Hella, a brand known for electrical and thermal management components used in automotive applications. Confirm fitment against the vehicle’s year, make, model, and connector configuration before ordering.