G35/350Z HR Upstream Oxygen Sensor (02 Sensor) | OEM Replacement VQ35HR

Maintain your vehicle’s performance and fuel economy with these high-quality OEM replacement upstream O2 sensors for the G35 HR Sedan and HR Nissan 350Z. Located before the catalytic converter, upstream oxygen sensors are critical for measuring the oxygen content in the exhaust gases as they leave the combustion chamber. This real-time data allows the ECU to adjust the air-fuel ratio for peak engine efficiency and responsiveness. If you’re experiencing poor fuel economy, rough idle, or check engine codes like P0130 or P0150, replacing these sensors can resolve the issue and restore optimal performance.

Features:
• OEM Quality: Direct-fit replacement sensors that meet or exceed original equipment specifications for accuracy and reliability.
• Real-Time Feedback: Upstream sensors provide fast and precise readings of air-fuel ratio, allowing the ECU to maintain ideal combustion conditions.
• Restores Performance: Fixes symptoms like hesitation, rough idle, misfires, or poor acceleration due to faulty sensor readings.
• Built to Last: Constructed to endure high exhaust temperatures and continuous cycling.
• Easy Installation: Plug-and-play fit for HR-equipped models, with factory-style connectors.

Specifications:

• Fits: Infiniti G35 Sedan (2007-2008) HR

• Fits: Nissan 350Z (2007-2009) HR

• Sensor Location: Upstream (Pre-Catalytic Converter)

• Part Numbers: 22693-7S000 (Bank 1) and 22693-7S010 (Bank 2)

Upstream O2 sensors, also known as pre-catalytic converter oxygen sensors, monitor the level of oxygen in the exhaust gases before they enter the catalytic converter. Their primary function is to provide real-time data to the engine control unit (ECU) about the engine’s air-fuel ratio. This information is crucial for the ECU to make precise adjustments to fuel delivery and ignition timing, ensuring optimal combustion, performance, and fuel efficiency. If the upstream O2 sensors detect an imbalance in the air-fuel mixture, they can trigger a check engine light and set specific trouble codes. Replacing faulty upstream O2 sensors helps maintain proper engine function, improves fuel economy, and reduces harmful emissions.