Walker 350-341086 Oxygen Sensor - Downstream

OE Replacement Oxygen Sensor for Toyota C-HR

Walker OE Replacement oxygen sensor 350-341086 is a specific-fit, heated narrow-band sensor built for downstream use on select Toyota C-HR models. It is engineered to provide the ECU with the feedback needed for emissions monitoring and fuel control on the affected application.

Key Features

• Specific-fit downstream oxygen sensor for select Toyota C-HR applications
• Heated narrow-band design for standard replacement service
• 4-wire configuration with square connector and male terminals
• M18 x 1.5 threaded mounting with 22 mm wrench size
• Wiring harness length: 525 mm; overall length: 558 mm
• Walker OE Replacement line for application-matched sensor coverage

Product Details

The Walker OE Replacement line focuses on direct-fit engine management components matched to the vehicle application, sensor position, and diagnostic requirements. Part number 350-341086 is a downstream oxygen sensor for 2022 Toyota C-HR and 2018-2021 Toyota C-HR, B1S2, OE Replacement. It is a heated, narrow-band sensor with a 4-wire layout, spade terminals, male connector and terminal gender, and a threaded mount for installation in the exhaust stream.

For Toyota C-HR owners searching for a downstream oxygen sensor, Toyota C-HR B1S2 replacement, or Walker 350-341086 oxygen sensor, this part is built to match the specified fitment and sensor position. Walker Products has long focused on engine management and fuel system components for OE-style replacement needs.

Common Issues This Sensor May Address

• Check engine light or malfunction indicator light related to the downstream oxygen sensor
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to incorrect ECU sensor input
• Stored fault codes associated with the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle application, downstream position, and connector style before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life and affect signal quality. Verify the M18 x 1.5 thread engagement and use the correct 22 mm wrench size during removal and installation.

Quality Assurance

Walker Products manufactures OE replacement sensors for application-specific fitment and diagnostic feedback requirements. The brand operates as an ISO 9001/TS 16949 certified company and has supplied engine management components since 1946. Part number 350-341086 is built for the listed Toyota C-HR fitments and downstream sensor position.