Walker 250-24860 Oxygen Sensor - Downstream

Walker OE Oxygen Sensor for Mazda RX-8

Walker Products OE 250-24860 is a heated oxygen sensor built for specific downstream applications on the Mazda RX-8. It is engineered as an OE-style replacement to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions monitoring.

For 2009-2011 Mazda RX-8 downstream bank 1 sensor 2 service, this Walker Products OE sensor is matched to the application, mounting position, and connector style. The 250-24860 is a direct-fit, threaded sensor with a 4-wire heated design for vehicles that rely on accurate exhaust feedback.

Key Features

• Fits 2009-2011 Mazda RX-8, downstream
• Heated oxygen sensor design for faster operating response
• Specific-fit application for the correct vehicle position
• 4-wire configuration with male connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 8.39 in.; overall length: 11.93 in.
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products OE 250-24860 is part of the Walker Products OE line, which focuses on application-specific engine management and oxygen/air-fuel sensor replacements. This sensor is manufactured for the downstream location on select Mazda RX-8 models and is intended to provide the ECU with the exhaust feedback needed for emissions and drivability control. The 250-24860 is a practical choice when replacing a failed downstream oxygen sensor on a 2009-2011 Mazda RX-8.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Sensor May Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing downstream sensor
• Rough engine operation tied to sensor signal errors
• Stored ECU fault codes associated with the affected sensor circuit

Installation Notes

Verify the vehicle application before installation and confirm the downstream bank 1 sensor 2 position on the Mazda RX-8. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before replacement, since damaged wiring can shorten sensor life and affect readings. Threaded installation requires proper removal and tightening practices to avoid damaging the exhaust bung or sensor threads.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts and manufactured under ISO 9001/TS 16949 quality systems. The brand has supplied engine management components since 1946, with application-specific cataloging and fitment-focused design for modern diagnostic systems.