NTK 24508 Oxygen Sensor - Downstream or Upstream

NTK Direct Fit Oxygen Sensor 24508

NTK 24508 is a direct fit oxygen sensor for specific Toyota applications, including downstream and upstream positions on select Celica, Paseo, Tercel, and RAV4 models. Built as a non-heated, threaded sensor with a 2-wire configuration and 11.75-inch wiring harness length, it is specified for OE-style replacement where exact fitment matters.

Key Features

• Direct Fit Oxygen Sensor for specific Toyota applications
• Non-heated sensor design with 2-wire configuration
• 11.75-inch wiring harness length
• Threaded mounting type with 18 mm thread diameter
• OE-style fit, form, and function for emission control service
• NTK part number 24508

Product Details

NTK is a major original equipment oxygen sensor manufacturer, and the Direct Fit Oxygen Sensor line is built to streamline replacement selection while maintaining application-specific coverage. Part number 24508 uses NTK’s ceramic manufacturing expertise and is tested during production to meet or exceed OE specifications for quality and reliability. This sensor is used in emission control systems where accurate exhaust gas feedback is required for proper engine management. This part cross-references Bosch 12108 and DENSO Auto Parts 234-2010 for the same application.

Vehicle Fitment

• Fits 1994-1999 Toyota Celica, downstream
• Fits 1997-1999 Toyota Paseo, upstream
• Fits 1997-1999 Toyota Tercel, upstream
• Fits 1996-1997 Toyota RAV4, downstream

Common Replacement Reasons

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback in the exhaust system
• Failed emissions inspection due to sensor degradation
• Slow or inaccurate sensor response in Toyota Celica, Paseo, Tercel, or RAV4 applications
• Corrosion or wiring damage at the original sensor connection

Installation Notes

Verify the sensor position before ordering, since NTK 24508 is listed for both upstream and downstream applications depending on vehicle. Confirm the 2-wire, non-heated configuration, threaded mounting style, and harness length against the original part. For best results, compare the connector and thread specifications with the removed sensor before installation.

Quality Assurance

NTK manufactures oxygen sensors with OE-level application coverage and production testing focused on fit, form, and function. As part of the NGK family of products, NTK supports import and domestic emission control service with original equipment engineering experience.