Walker 350-341121 Oxygen Sensor - Center

OE Replacement Oxygen Sensor for Land Rover

Walker OE Replacement oxygen sensor part number 350-341121 is a specific-fit, heated narrow-band sensor built for direct replacement in select Land Rover applications. It is engineered to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring.

Compatible With 2019-2025 Land Rover Range Rover Sport, center; 2020-2022 Land Rover Range Rover, center; 2020-2025 Land Rover Defender 110, center; 2021-2025 Land Rover Defender 90, center; 2021-2025 Land Rover Discovery, center; and 2024 Land Rover Range Rover Sport, center.

Key Features

• Walker OE Replacement line for application-specific sensor coverage
• Heated narrow-band oxygen sensor for monitored exhaust feedback
• Specific fit for the listed Land Rover center positions
• 4-wire design with blade terminals and female connector
• Threaded mounting with M18 x 1.5 thread size
• 22 mm wrench size and 350 mm overall length

Product Details

The Walker 350-341121 oxygen sensor is built for vehicles that rely on precise exhaust-gas feedback to manage air-fuel ratio and emissions performance. As an OE replacement sensor, it is matched to the listed application and position so the ECU receives the correct signal for system operation. This part number 350-341121 is a direct-fit solution for center-mounted Land Rover Defender 110, Defender 90, Discovery, Range Rover, and Range Rover Sport applications listed above.

Walker Products has focused on engine management and oxygen/air-fuel sensors since 1946, with manufacturing aligned to ISO 9001/TS 16949 quality systems. The OE Replacement product line is built around application-specific fitment rather than universal coverage, which helps simplify selection for Land Rover Range Rover Sport and other listed models.

What It Helps Address

• Illuminated malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel control
• Higher exhaust emissions from a degraded sensor signal
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Confirm the center position and connector style before installation. Inspect the sensor wiring harness and connector for physical damage, since damaged wiring can shorten service life and affect signal quality. Verify thread size, mounting type, and terminal configuration against the original sensor before replacement.

Quality Assurance

Walker Products manufactures this OE Replacement oxygen sensor as an application-specific part for the listed vehicles and position. The brand’s engine management sensor program is supported by ISO 9001/TS 16949 manufacturing practices and long-running OE-style replacement coverage.