NTK 24614 Oxygen Sensor - Downstream, Upstream, Upstream Left or Upstream Right

Direct Fit Oxygen Sensor for Subaru Applications

The NTK 24614 direct fit oxygen sensor is a heated, threaded replacement built for specific applications that require OE-style fitment and signal accuracy. It is engineered for Subaru Impreza and Subaru Legacy upstream locations, making it a practical choice for air/fuel ratio monitoring on the listed vehicles.

NTK’s Direct Fit Oxygen Sensor line focuses on streamlined coverage and OE application support. As part of the NGK family of products, NTK uses controlled ceramic technology and manufacturing processes designed to deliver consistent sensor performance, fit, and form for import and domestic vehicles.

Key Features

• Direct fit oxygen sensor for specific applications
• Heated sensor design for faster operating readiness
• 3-wire configuration with a 17.25 in. wiring harness length
• Threaded mounting type with 18 mm thread diameter
• OE-style replacement for upstream air/fuel ratio monitoring
• Fits 1990-1994 Subaru Legacy, upstream
• Fits 1993-1995 Subaru Impreza, upstream

Detailed Description

NTK part number 24614 is a direct fit oxygen sensor intended for upstream placement on 1990-1994 Subaru Legacy and 1993-1995 Subaru Impreza models. It is a heated, threaded sensor with a specific-fit design, which helps simplify replacement on the listed Subaru applications while maintaining the original sensor style and connection layout. This part number 24614 is built for vehicles that rely on accurate exhaust oxygen feedback to support fuel control and emissions monitoring.

This part cross-references DENSO Auto Parts (e.g., 234-3083, 234-3088) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air/fuel ratio readings from a worn upstream sensor
• Rough idle or drivability issues tied to sensor signal degradation
• Failed emissions inspection caused by sensor-related faults
• Slow sensor response from age, heat cycling, or contamination

Installation Notes and Tips

Verify the vehicle’s year, model, and upstream sensor location before ordering. This NTK 24614 oxygen sensor uses a threaded mounting style and a specific-fit harness layout, so connector and routing match-up should be confirmed against the original part. For best results, inspect the exhaust bung threads and wiring path before installation, and compare the removed sensor to the replacement before final fitment on Subaru Impreza or Subaru Legacy applications.

Quality Assurance

NTK manufactures oxygen sensors with OE-level application coverage and extensive production testing to support consistent quality and reliability. The brand’s focus on controlled ceramic technology and original equipment supply helps ensure the sensor meets the fit, form, and function expected for the listed Subaru applications.