Walker 350-35185 Oxygen Sensor - Upstream

Walker OE Replacement Oxygen Sensor

Walker OE Replacement oxygen sensor 350-35185 is a specific-fit, heated wide-band sensor built for upstream exhaust monitoring. It is engineered for direct ECU feedback on the listed Nissan Frontier and Suzuki Equator applications, helping maintain accurate air-fuel control and emissions system performance.

Key Features

• Specific-fit oxygen sensor for the correct application and mounting position
• Heated wide-band design for responsive exhaust gas measurement
• 5-wire configuration with rectangular connector and male spade terminals
• M18 x 1.5 threaded mounting with 22 mm wrench size
• Standard replacement grade for OE-style sensor service
• Walker OE Replacement line focuses on application-specific engine management sensors

Product Details

The Walker Products OE Replacement line is built around application-matched engine management components, including oxygen and air-fuel sensors for vehicles worldwide. Part number 350-35185 is made for upstream placement and is specified for the 2005-2009 Nissan Frontier, upstream B1S1; the 2010-2012 Nissan Frontier, upstream; and the 2009 Suzuki Equator, upstream. If you are searching for an upstream oxygen sensor for a 2010 Nissan Frontier or a 2009 Suzuki Equator B1S1 replacement, this sensor matches the listed fitment and connector style.

Walker has supplied engine management sensors and fuel system components since 1946, and its OE Replacement line is focused on direct-fit service parts that align with the vehicle’s original diagnostic requirements. This part number, 350-35185, is intended for vehicles that use a wide-band upstream sensor with the listed thread, connector, and wire configuration.

Common Issues This Sensor May Address

• Check engine light related to upstream oxygen sensor performance
• Poor fuel economy caused by inaccurate air-fuel feedback
• Rough engine operation from incorrect exhaust mixture readings
• Elevated exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to 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 upstream location, thread size, connector shape, and wire count match the original sensor before installation. Because this is a threaded sensor, proper removal tools and the correct 22 mm wrench size help reduce the risk of damage during service.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement parts and operates as an ISO 9001/TS 16949 certified company. The OE Replacement line is built for application-specific fitment and diagnostic feedback requirements, supporting the vehicle’s ECU with the correct sensor signal.