Walker 250-24465 Oxygen Sensor

OE Oxygen Sensor for BMW and Mercedes-Benz

Walker Products OE 250-24465 is a heated oxygen sensor built for specific downstream applications on select BMW and Mercedes-Benz vehicles. It is engineered as an OE-style replacement to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for downstream placement
• Specific-fit design for the listed BMW and Mercedes-Benz applications
• 4-wire configuration with a male radiused polygon connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 17.24 in.; overall length: 20.79 in.
• Wire gauge: 22

Product Details

Walker Products OE line focuses on direct-replacement engine management components built for defined vehicle applications. Part number 250-24465 is designed for downstream oxygen sensor locations, including bank and rear positions where specified in the fitment data. For BMW M5, M6, Z4, 328i, 335i, 528i, X5, and related models, as well as Mercedes-Benz SL55 AMG, E500, C320, and others, this sensor supports the ECU’s emissions and fuel-trim monitoring strategy.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures to ISO 9001/TS 16949 standards. If a sensor fault is present, the vehicle may store ECU codes and show drivability or emissions-related symptoms. This part cross-references Bosch 17098 and Denso 234-9005 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Fault codes stored in the ECU for sensor or emissions-system monitoring
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation tied to incorrect air-fuel correction
• Elevated exhaust emissions from a failing sensor circuit

Installation Notes and Tips

Confirm the exact position before installation: downstream right, downstream left, downstream rear, or downstream, depending on the vehicle. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement. Verify the threaded mounting point is clean and undamaged, and match the application by year, make, model, and bank/sensor location.

Quality Assurance

Walker Products OE sensors are manufactured for specific applications and fitment positions to provide the diagnostic feedback required by the ECU. The brand’s ISO 9001/TS 16949 manufacturing background supports consistent OE-style replacement quality.