NTK EF0079 Engine Coolant Temperature Sensor - Rear, Right or Upper

Engine Coolant Temperature Sensor for VW and Audi

The NTK Engine Coolant Temperature Sensor EF0079 provides direct temperature feedback to the engine control system for select Volkswagen and Audi applications. Built with a 4-terminal blade design, round female connector, and no wiring harness included, it matches the OE-style electrical interface used on many import cooling systems.

NTK, The Sensor Specialist, expands on NGK’s automotive sensor expertise with technical sensors for import and domestic vehicles. This EF0079 sensor is part of that full-line coverage and is manufactured to meet or exceed OE specifications after testing that includes thermal shock, vibration, and OBD verification.

Key Features

• Part number: EF0079
• Engine coolant temperature sensor for cooling system temperature reporting
• Blade terminals with 4 terminal quantity
• Round connector shape with female connector gender
• No wiring harness included
• OE-focused design for select Volkswagen and Audi models
• Cross-references Beck/Arnley 158-0629 and Delphi TS10236 for the same application

Detailed Description

The NTK EF0079 engine coolant temperature sensor is used to monitor coolant temperature and send accurate data to the vehicle’s engine management system. On applications such as the Volkswagen Beetle, Jetta, Passat, Golf, and Audi A4, A6, TT, and related models, correct coolant temperature input supports fuel control, idle quality, and cooling fan operation. This sensor is also listed for multiple fitments across 1997-2011 Volkswagen and Audi vehicles, including configurations with 4-pin terminals, green or black housings, and thermostat housing or water crossover locations.

NTK applies OE experience and technical sensor testing to help ensure consistent performance in demanding thermal and vibration conditions. The EF0079 is a direct-fit style replacement for many VW and Audi coolant temperature sensor applications, including fitments such as Fits 2005-2008 Audi A4, Upper; Fits 2000-2005 Volkswagen Jetta, N/A; and Fits 2001-2004 Audi A6 Quattro, N/A.

What It Helps Address

• Incorrect coolant temperature readings on the dash or scan tool
• Hard starting or rough idle related to inaccurate temperature input
• Cooling fan control issues caused by faulty sensor data
• Fuel mixture problems from an engine control module receiving bad temperature signals
• Check engine lights tied to coolant temperature sensor faults

Installation Notes and Tips

Verify connector style, terminal count, and sensor location before installation. This EF0079 uses a round female connector with blade terminals and does not include a wiring harness. Confirm the exact application by year, make, model, and position, especially on Audi A4, A6, TT, and Volkswagen Beetle, Jetta, and Passat vehicles where multiple coolant sensor variants were used.

For best results, compare the removed sensor to the new part before installation and inspect the connector for corrosion or damaged terminals. On vehicles with thermostat housing or water crossover mounting points, make sure the sealing surface is clean and the cooling system is properly serviced before returning the vehicle to operation.

Quality Assurance

NTK sensors are manufactured to meet or exceed OE specifications and are validated through thermal shock, vibration, and OBD verification testing. Backed by NGK’s long automotive history and NTK’s OE application coverage, the EF0079 is built for dependable sensor performance in import cooling system applications.