NTK 24603 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor for OE Replacement

NTK Oxygen Sensor 24603 is a direct fit, heated oxygen sensor built for specific applications that require an OE-style threaded replacement. It is engineered for downstream use on select Acura and Honda models, including Acura CL, Acura TL, Honda Accord, and Honda Prelude applications listed below.

As part of NTK’s Direct Fit Oxygen Sensor line, this sensor focuses on correct fit, form, and function for import and domestic coverage. The 4-wire heated design, 18 mm thread diameter, and threaded mounting style support a straightforward replacement on the specified vehicles.

Key Features

• NTK part number 24603
• Direct fit, specific application oxygen sensor
• Heated sensor design for downstream placement
• 4-wire configuration
• 18 mm thread diameter with threaded mounting
• 33.75 in. wiring harness length
• OE-equivalent design for listed Acura and Honda applications

Product Details

NTK is known for oxygen sensor manufacturing and OE application coverage, and the Direct Fit Oxygen Sensor line is built to streamline replacement selection while maintaining original-equipment style fitment. NTK 24603 is manufactured with ceramic sensor technology and tested during production to help meet or exceed OE specifications for the listed vehicles. This part cross-references DENSO Auto Parts 234-4601 for the same application.

Compatible With 1997-1999 Acura CL, downstream; 1999 Acura TL, downstream; 1998-1999 Honda Accord, downstream; 1995-1997 Honda Accord, downstream; and 1996 Honda Prelude, downstream. Search terms such as downstream oxygen sensor for 1998-1999 Honda Accord, heated oxygen sensor for 1997-1999 Acura CL, and OE replacement oxygen sensor for 1999 Acura TL all point to this application set.

Common Issues This Part May Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn downstream sensor
• Slow sensor response on heated oxygen sensor circuits
• Emissions test failures tied to sensor degradation
• Rough fuel control caused by inaccurate exhaust oxygen feedback

Installation Notes and Tips

Verify the vehicle’s year, make, model, and downstream sensor location before ordering. Confirm the 4-wire connector style, 18 mm threaded mounting, and harness length against the original sensor on the vehicle. For best results, inspect the connector, wiring routing, and exhaust bung condition before installation.

Quality Assurance

NTK manufactures oxygen sensors with OE-focused engineering and production testing to support reliable fit and function on the listed Acura and Honda applications. The Direct Fit Oxygen Sensor line is backed by NTK’s role as a major original equipment oxygen sensor supplier.