049-919-501 VW & Audi Coolant Temperature Sensor - Black 1-Pin

Coolant Temperature Sensor – 049-919-501

The 049-919-501 is a single-pin, black-coded temperature sender used across a vast range of classic water-cooled Volkswagen and Audi vehicles. This sensor is primarily responsible for sending accurate temperature data to the dashboard coolant gauge, allowing drivers to monitor engine heat and prevent overheating. It features a standard M10x1 metric thread and is designed to operate within a temperature range of 32°F to 257°F.

This sensor is typically located in the coolant flange on the side of the cylinder head or in the thermostat housing. Because it relies on a single-pin grounded connection through the engine block, ensuring the threads are clean and free of excessive sealant is critical for accurate readings. If your temperature needle is "dead," fluctuating wildly, or staying at the bottom of the gauge, the 049-919-501 is the most common part required for repair.

Detailed Vehicle Compatibility

Audi 200:

• 1989, 1990, 1991

Audi 200 Quattro:

• 1989, 1990, 1991

Audi 4000:

• 1980, 1981, 1982, 1983

Audi 5000:

• 1979, 1980, 1981, 1982, 1983, 1986, 1987, 1988

Audi 5000 Quattro:

• 1986, 1987, 1988

Audi Fox:

• 1973, 1974, 1975, 1976, 1977, 1978, 1979

Volkswagen Cabriolet:

• 1985, 1986, 1987, 1988, 1989

Volkswagen Dasher:

• 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981

Volkswagen Fox:

• 1987, 1988, 1989, 1990, 1991, 1992, 1993

Volkswagen Golf:

• 1985, 1986, 1987, 1988

Volkswagen Jetta:

• 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988

Volkswagen Passat:

• 1990, 1991, 1992, 1993

Volkswagen Quantum:

• 1982, 1983, 1984, 1985

Volkswagen Rabbit:

• 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984

Volkswagen Rabbit Convertible:

• 1980, 1981, 1982, 1983, 1984

Volkswagen Rabbit Pickup:

• 1980, 1981, 1982, 1983

Volkswagen Scirocco:

• 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988

Volkswagen Vanagon:

• 1982, 1983, 1984, 1985, 1986, 1987

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Product Highlights & Features

• OEM Specification: Precision-calibrated to ensure your dashboard gauge reflects the true operating temperature of the engine.

• Compact Single-Pin Design: Uses a simple 0.250-inch spade terminal for quick and easy electrical connection.

• Black Color-Coded Ring: Visually identified by a black insulator to distinguish it from the white or blue sensors used for EFI signals or oil temperature.

• Durable Construction: Built with a high-conductivity brass body and a high-heat resistant polymer insulator for longevity.

Technical Specifications

• Part Number: 049-919-501

• Pin Count: 1-Pin

• Thread Size: M10 x 1

• Wrench Size: 14mm

• Temperature Range: 32°F to 257°F

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Installation & Maintenance Tips

• Coolant Loss: Always replace this sensor when the engine is completely cold. Have your new sensor ready to swap in immediately to minimize fluid loss.

• Electrical Grounding: Since this is a single-wire sensor, it grounds through its threads. Avoid using excessive Teflon tape, as it can act as an insulator and cause the gauge to read incorrectly.

• Check the Connector: The single female spade terminal on the vehicle wiring harness is prone to corrosion. Clean the terminal with a wire brush to ensure a solid signal.

• Verify Seal: Ensure the small metal crush washer is present. Reusing a crushed washer can lead to slow leaks under pressure.

• Aftermarket Gauges: Can be used with aftermarket gauges if matching the Ohms range.

 

049919501

01939

68-0068

100 919 0015

V15-99-1989

V15991989