Walker 250-241077 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Walker Products OE Oxygen Sensor for Mercedes-Benz

Walker Products OE part number 250-241077 is a heated oxygen sensor built for specific downstream applications on select Mercedes-Benz models. It is engineered as an OE-style replacement with the correct fitment position, connector style, and ECU feedback expected by the vehicle.

For Mercedes-Benz G550, G63 AMG, C63 AMG, and GLC63 AMG applications, this sensor is specified for downstream locations including right-side and left-side positions where listed. If your vehicle has a fault code, poor fuel economy, elevated emissions, or an illuminated MIL, the oxygen sensor circuit, wiring harness, and connector should be inspected for damage as part of diagnosis.

Key Features

• Walker Products OE oxygen sensor, part number 250-241077
• Heated sensor design for downstream exhaust monitoring
• Specific-fit application for listed Mercedes-Benz models
• 4-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 32.99 in; overall length: 36.54 in
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products OE is the brand line focused on original-equipment-style engine management and oxygen/air-fuel sensors. Part number 250-241077 follows that approach with application-specific calibration and physical fitment for the listed Mercedes-Benz downstream positions. It is intended for vehicles that require accurate exhaust feedback to the ECU, helping maintain proper sensor reporting after replacement.

This part cross-references no listed aftermarket part numbers for the same application. Search terms commonly used for this part include Mercedes-Benz downstream oxygen sensor replacement, heated O2 sensor for G550, and Walker Products OE 250-241077.

What This Sensor Helps Address

• Check engine light or MIL related to oxygen sensor performance
• Fault codes stored in the ECU for downstream sensor circuits
• Poor engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect sensor readings
• Higher exhaust emissions from a failing oxygen sensor

Installation Notes

• Verify the exact downstream position before ordering: right, left, or general downstream as listed by fitment.
• Inspect the sensor connector, harness, and nearby wiring for heat damage or corrosion before installation.
• Confirm thread size and connector style match the original sensor on the vehicle.
• Use the vehicle’s diagnostic trouble codes and service information to confirm the failed component before replacement.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The 250-241077 oxygen sensor is built for the specified OE replacement application on Mercedes-Benz vehicles, including G550, G63 AMG, C63 AMG, and GLC63 AMG fitments.

• Fits 2022-2024 Mercedes-Benz G550, downstream right
• Fits 2022-2024 Mercedes-Benz G63 AMG, downstream right
• Fits 2023 Mercedes-Benz C63 AMG S, downstream right
• Fits 2021 Mercedes-Benz C63 AMG, downstream
• Fits 2021 Mercedes-Benz C63 AMG S, downstream
• Fits 2016-2021 Mercedes-Benz G550, downstream right
• Fits 2015-2021 Mercedes-Benz G63 AMG, downstream right
• Fits 2021 Mercedes-Benz GLC63 AMG, downstream left
• Fits 2021 Mercedes-Benz GLC63 AMG S, downstream left
• Fits 2016-2020 Mercedes-Benz C63 AMG, downstream right
• Fits 2016-2020 Mercedes-Benz C63 AMG, downstream left
• Fits 2018-2020 Mercedes-Benz GLC63 AMG, downstream right
• Fits 2018-2020 Mercedes-Benz GLC63 AMG S, downstream right
• Fits 2015-2018 Mercedes-Benz C63 AMG S, downstream right
• Fits 2015-2018 Mercedes-Benz C63 AMG S, downstream left
• Fits 2016-2018 Mercedes-Benz G550, downstream left
• Fits 2017-2018 Mercedes-Benz G550 4x4, downstream right
• Fits 2017-2018 Mercedes-Benz G550 4x4, downstream left
• Fits 2015-2018 Mercedes-Benz G63 AMG, downstream left