NTK 23044 Oxygen Sensor - Upstream

Direct Fit Oxygen Sensor for OE Replacement

The NTK 23044 direct fit oxygen sensor is built for specific upstream applications that require an OE-style threaded sensor with a 19-inch wiring harness and a single-wire, non-heated design. It is a practical replacement for older import vehicles where accurate air/fuel feedback and proper sensor response are important for drivability and emissions performance.

Compatible With select Audi, Volkswagen, Jaguar, Saab, and Subaru applications, this NTK oxygen sensor is engineered for direct installation in the original location. The NTK 23044 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific coverage and OE-style form, fit, and function.

Key Features

• Part number: NTK 23044
• Direct Fit Oxygen Sensor for specific upstream applications
• Non-heated sensor design
• Single-wire configuration
• 19.0000 wiring harness length
• 18.000 thread diameter with threaded mounting type
• OE-style replacement for select Bank 1 Sensor 1 applications

Product Details

NTK is known for oxygen sensor manufacturing across import and domestic vehicle coverage, and this sensor reflects that focus with application-specific engineering and extensive manufacturing testing. The ceramic-based sensor construction is developed with controlled material processing from raw input through finished product, supporting consistent signal output and reliable operation. For shoppers searching for an upstream oxygen sensor for 1980s Audi 4000, Volkswagen Golf, or Jaguar XJ6 applications, the NTK 23044 provides a direct-fit replacement path without requiring a universal sensor conversion.

This part cross-references Bosch 12046 and DENSO Auto Parts 234-1011 for the same application.

Common Problems This Sensor Can Address

• Faulty upstream oxygen sensor readings
• Rich or lean air/fuel mixture concerns
• Check engine light related to oxygen sensor performance
• Emissions test failures tied to sensor output
• Rough idle or hesitation caused by inaccurate exhaust feedback

Installation Notes and Fitment Tips

Install this sensor in the upstream position only where the vehicle listing specifies Bank 1 Sensor 1 or equivalent OE placement. Confirm the connector style, harness length, and threaded mounting location before installation. Fits 1986-1987 Audi 4000 Quattro, Upstream; Fits 1986-1987 Audi Coupe, Upstream; Fits 1986-1987 Subaru Standard, Upstream; Fits 1987 Volkswagen Cabriolet, Upstream; Fits 1987 Volkswagen Fox, Upstream; Fits 1987 Volkswagen Golf, Upstream; Fits 1986 Audi 4000, Upstream; Fits 1986 Audi Quattro, Upstream; Fits 1986 Volkswagen Cabriolet, Upstream; Fits 1986 Volkswagen Golf, Upstream; Fits 1986 Volkswagen Jetta, Upstream; Fits 1986 Volkswagen Quantum, Upstream; Fits 1980-1985 Audi 4000, Upstream; Fits 1984-1985 Audi 4000 Quattro, Upstream; Fits 1981-1985 Audi Coupe, Upstream; Fits 1983-1985 Audi Quattro, Upstream; Fits 1982-1985 Jaguar Vanden Plas, Upstream; Fits 1979-1985 Jaguar XJ6, Upstream; Fits 1979-1985 Saab 900, Upstream; Fits 1981-1985 Subaru Standard, Upstream; Fits 1985 Volkswagen Cabriolet, Upstream; Fits 1985 Volkswagen Golf, Upstream; Fits 1980-1985 Volkswagen Jetta, Upstream; Fits 1982-1985 Volkswagen Quantum, Upstream; Fits 1980-1984 Volkswagen Rabbit Convertible, Upstream; Fits 1980-1983 Volkswagen Rabbit Pickup, Upstream.

Quality Assurance

NTK is part of the NGK family of products and is a major original equipment oxygen sensor manufacturer. This sensor is manufactured and tested to meet or exceed OE specifications for fit, form, and function.