Walker 350-341030 Oxygen Sensor - Downstream

Walker OE Replacement Oxygen Sensor for Honda Accord

Walker OE Replacement oxygen sensor 350-341030 is a direct-fit, heated narrow-band sensor built for specific vehicle applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on the downstream position.

Compatible with 2023-2025 Honda Accord, downstream and 2018-2021 Honda Accord, downstream (B1S2), this sensor is a practical OE-style replacement for diagnosing and restoring exhaust sensor performance on the Honda Accord. The 350-341030 part number is matched to the application, mounting position, and connector style for straightforward service selection.

Key Features

• Heated narrow-band oxygen sensor for downstream placement
• Specific-fit design for application-matched installation
• 4-wire configuration with spade terminals
• Oblong connector shape with female terminal gender
• Threaded mounting type with M18 x 1.5 thread size
• Standard replacement grade for OE-style service
• 22 mm wrench size and 533 mm overall length

Product Details

Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for a wide range of vehicles. This sensor is built for the downstream location on the Honda Accord and is intended to deliver the diagnostic feedback the ECU expects from the exhaust monitoring system. The Walker 350-341030 is a specific-fit oxygen sensor, not a universal unit, which helps ensure the correct connector, thread, and wire configuration for the listed applications.

Walker Products has supplied engine management components since 1946 and manufactures to ISO 9001/TS 16949 quality standards. For buyers searching for a Honda Accord downstream oxygen sensor, 2023-2025 Honda Accord oxygen sensor replacement, or 2018-2021 Honda Accord B1S2 sensor, this part provides an OE-style service option.

What It Helps Address

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

Installation Notes and Tips

Before replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals. Confirm the downstream location and verify thread size, connector shape, and wire count against the original part before installation. If the vehicle has stored fault codes, clear them after repair and confirm the system returns to normal operation.

Quality Assurance

Walker Products manufactures this OE Replacement sensor as a specific-application part for the listed Honda Accord fitments. The brand’s engine management components are produced under ISO 9001/TS 16949 quality systems to support consistent fit and diagnostic performance.