Walker 350-34314 Oxygen Sensor - Upstream Rear

Walker 350-34314 Oxygen Sensor for Acura NSX

Walker Products 350-34314 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for the exhaust system. It is built for the upstream rear position on the 1997-1999 Acura NSX and is designed to provide the ECU with the feedback needed for proper fuel control and emissions monitoring.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. For Acura NSX owners, this part number 350-34314 matches the required mounting position and connector style for a direct replacement service part.

Key Features

• Specific-fit heated oxygen sensor for targeted vehicle application
• Fits 1997-1999 Acura NSX, upstream rear
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire design with 20-gauge wiring
• 32.6 in. wiring harness length and 36.14 in. overall length
• Male connector with radiused polygon connector shape

Detailed Description

The Walker Products 350-34314 oxygen sensor is engineered for vehicles that rely on accurate exhaust feedback to manage air-fuel ratio and emissions performance. This heated sensor is a direct-fit replacement for the upstream rear location on the 1997, 1998, and 1999 Acura NSX, making it a practical choice when servicing a failing sensor in that exhaust position. The part number 350-34314 is built to match the application-specific fitment and connector requirements used by the vehicle ECU.

Walker Products has supplied engine management components since 1946 and manufactures sensors for OE-style replacement use across many vehicle platforms. For Acura NSX applications, this sensor supports the diagnostic feedback the ECU expects from the upstream rear exhaust location.

Common Issues This Sensor May Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions from a degraded sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Before installation, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals. Confirm the upstream rear location on the Acura NSX exhaust system and verify the threaded mounting point is clean and undamaged. Because this is a specific-fit sensor, compare the connector shape, wire count, and harness length to the original part before installation.

For best results, clear any stored fault codes after replacement and confirm the ECU returns to normal closed-loop operation. If the original sensor failed from wiring damage or exhaust leaks, correct those conditions before installing the new sensor.

Quality Assurance

Walker Products is an ISO 9001 and TS 16949 certified automotive manufacturer with a long history in engine management and fuel system components. The 350-34314 oxygen sensor is produced as an application-specific replacement part for the listed Acura NSX fitment.