Walker 250-24466 Oxygen Sensor

OE Oxygen Sensor for BMW and Mercedes-Benz

Walker Products OE 250-24466 is a heated, specific-fit oxygen sensor built for downstream and selected upstream applications on BMW and Mercedes-Benz vehicles. It is engineered to deliver the ECU feedback needed for accurate fuel control and emissions monitoring.

Walker Products OE focuses on application-specific engine management sensors, with fitment matched to the vehicle position and connector style. For BMW 535i, BMW X6, and Mercedes-Benz models such as the SLK55 AMG, this sensor is a direct replacement for the original downstream or right-side sensor location listed below.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with 22-gauge wiring
• 27.09 in. wiring harness length and 30.63 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Radiused polygon connector shape with male connector gender
• Walker Products OE part number 250-24466

Detailed Description

Walker Products OE 250-24466 is designed as an OE-style replacement oxygen sensor for emissions control systems that rely on precise exhaust feedback. The heated sensor design helps the ECU monitor air-fuel conditions after the catalyst or at the specified upstream location, depending on the vehicle application. This is a direct-fit sensor for listed BMW 740i, 740Li, 535i, 535i xDrive, 535xi, X6, and Mercedes-Benz C240, C320, CLK320, CLK430, CLK55 AMG, and SLK55 AMG applications. If the engine is running poorly, fuel consumption has increased, emissions have risen, or the malfunction indicator light is on, the sensor circuit and connector should be inspected along with the sensor itself. Part number 250-24466 is built for the exact position and connector requirements shown in the fitment data.

This part cross-references no listed interchange numbers in the provided data.

Common Issues This Sensor May Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback to the ECU
• Rough running or poor drivability tied to exhaust sensor faults
• Higher fuel consumption caused by inaccurate sensor readings
• Elevated exhaust emissions from a failing downstream or upstream sensor

Installation Notes and Tips

Verify the exact position before ordering, since this sensor is listed for downstream, downstream right, downstream left, and upstream right locations depending on the vehicle. Confirm the connector shape, wire count, and thread diameter match the original sensor. Inspect the wiring harness and connector for heat damage, abrasion, or corrosion before installation. For BMW 740i and BMW 740Li applications, confirm the bank and cylinder group noted in the fitment details. For Mercedes-Benz C240, C320, CLK320, CLK430, CLK55 AMG, and SLK55 AMG applications, match the side and sensor position exactly.

Quality Assurance

Walker Products has produced engine management and oxygen/air-fuel sensors since 1946 and operates as an ISO 9001/TS 16949 certified company. The Walker Products OE line is built around application-specific replacement parts for modern ECU-controlled emissions systems.