Febi 01939 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for VW and Audi

The Febi 01939 engine coolant temperature sensor is a direct-fit style replacement for select Volkswagen and Audi applications. It monitors coolant temperature for the engine management system, helping maintain accurate fuel and ignition control across a wide operating range.

Built with a black housing, a single electrical connection, and M10 x 1 outside thread, this febi sensor is specified for vehicles such as the Volkswagen Golf, Jetta, Passat, and Audi 80, 90, 100, and Coupe. The Febi 01939 is a practical choice when replacing a worn coolant temp sender on older VW and Audi cooling systems.

Key Features

• Engine coolant temperature sensor for cooling system and engine management input
• Black color coding for straightforward identification
• Single connection design
• M10 x 1 outside thread with 10.9 mm thread length
• 14 mm wrench size for service access
• Temperature range from 0 °C to 125 °C
• Febi part number 01939 for catalog matching and ordering

Product Details

Febi 01939 is engineered for older Volkswagen and Audi platforms that rely on a threaded coolant temperature sender. The sensor measures coolant temperature and sends that information to the vehicle’s control system, which uses it to manage cold-start enrichment, warm-up behavior, and operating temperature feedback. This part cross-references OE-style numbers such as 027 919 501 and 049 919 501 for the same application. If you are searching for an engine coolant temperature sensor for Volkswagen Golf, Jetta, Passat, or Audi 100 and 80-series models, Febi 01939 is a catalog-matched option built around the listed thread, connector, and temperature specifications.

Common Issues This Part May Address

• Incorrect coolant temperature readings on the dash or in engine data
• Hard cold starts or rough warm-up behavior
• Fuel mixture issues caused by inaccurate temperature input
• Cooling fan or engine management response problems tied to temperature signal errors
• Intermittent sensor faults from an aging threaded coolant sender

Installation Notes and Tips

Verify the thread size, connector style, and temperature specification against the original sensor before installation. Confirm the vehicle uses an M10 x 1 threaded coolant temperature sensor with a single electrical connection. Inspect the connector and surrounding cooling system components for corrosion, damaged wiring, or coolant residue before fitting the replacement. For best results, compare the old unit to Febi 01939 and confirm application details for your Volkswagen or Audi model by year.

Quality Assurance

febi is a recognized aftermarket brand with coverage across European vehicle service parts, and this sensor is listed with OE-style interchange references for application matching. Febi 01939 is cataloged for fitment on select Volkswagen and Audi models, including Golf, Jetta, Passat, and related Audi platforms.