Walker 250-24405 Oxygen Sensor

Walker Products OE Oxygen Sensor for Audi

Walker Products OE 250-24405 is a heated oxygen sensor built for specific vehicle applications and ECU feedback requirements. It is engineered as an OE-style replacement for select Audi A6, Audi 100, and Audi 100 Quattro models, with fitment for upstream and downstream positions depending on the application.

Walker Products OE focuses on application-specific engine management sensors, and this oxygen sensor follows that approach with the correct connector style, threaded mounting, and harness length for the listed vehicles. If your Audi A6 or Audi 100 is showing fuel trim or emissions-related faults, this part number 250-24405 is a direct-fit replacement for the confirmed positions below.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for listed Audi applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with male radiused polygon connector
• 45.98 in. wiring harness length and 49.53 in. overall length
• OE replacement from Walker Products OE, part number 250-24405

Application Details

Compatible With 1995 Audi A6, upstream left and upstream right; 1996-1997 Audi A6, downstream left and downstream right; 1994 Audi 100, upstream left and upstream right from chassis # 4A-R-062 001; and 1994 Audi 100 Quattro, upstream left and upstream right from chassis # 4A-R-062 001. This part number 250-24405 is also listed for the corresponding Audi 100 and Audi 100 Quattro upstream positions noted above.

Walker Products OE replacement sensors are built to provide the diagnostic feedback expected by the ECU on the listed vehicles. This makes the 250-24405 a practical choice when replacing a failed oxygen sensor on an Audi A6, Audi 100, or Audi 100 Quattro with the matching connector and mounting requirements.

Common Issues This Sensor Can Address

• Check engine light or MIL related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel readings
• Higher exhaust emissions from a degraded sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the vehicle year, model, engine management setup, and sensor position before ordering. Confirm whether the application calls for upstream or downstream placement, and inspect the wiring harness and connector for damage before installation. Because this is a threaded, specific-fit sensor, proper thread engagement and connector matching are important for correct operation.

Quality Assurance

Walker Products has produced engine management components since 1946 and manufactures OE-style replacement sensors for specific applications worldwide. The brand operates under ISO 9001/TS 16949 quality systems, supporting consistent fitment and diagnostic performance for the listed Audi applications.