Walker 350-64108 Oxygen Sensor - Downstream Rear or Downstream Right

OE Replacement Oxygen Sensor

Walker oxygen sensor 350-64108 is a specific-fit, OE replacement sensor engineered for applications that require accurate ECU feedback. It is a heated wide-band sensor with a threaded M18 x 1.5 mounting design and a 4-wire blade connection.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Heated wide-band design for precise exhaust feedback
• 4-wire blade connector with square female plug
• Threaded M18 x 1.5 mounting style
• Standard replacement grade for engine management service

Detailed Description

Walker Products 350-64108 is built as an OE replacement oxygen sensor for downstream applications where the ECU depends on stable sensor input. The wide-band design and heated construction support accurate air-fuel monitoring, while the threaded mounting and square connector help match the original sensor configuration. This part number is engineered for specific fitment, not universal use, and is listed for Lexus LC500h, Lexus LS500, and Lexus LS500h applications in downstream right and downstream rear positions. Walker 350-64108 is intended for vehicles that need a direct replacement sensor with the correct connector, terminal layout, and mounting style. The part number 350-64108 is also useful when cross-checking service records or ordering by reference.

What It Helps Address

• Fault codes related to oxygen sensor performance
• Poor engine operation caused by inaccurate exhaust feedback
• Higher fuel consumption from incorrect air-fuel data
• Increased exhaust emissions from a failing sensor
• Malfunction indicator light concerns tied to sensor faults

Installation Notes and Tips

Confirm the connector shape, terminal count, thread size, and mounting position before installation. Inspect the sensor wiring harness and connector for damage, since related electrical issues can shorten sensor life. This part is listed for Lexus LC500h, Lexus LS500, and Lexus LS500h downstream applications, so verify the exact position against the original unit before replacement. The part number 350-64108 should be matched to the vehicle application and sensor location during ordering.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts and manufactured under ISO 9001/TS 16949 quality systems. The brand has supplied engine management and fuel system components since 1946.