Denso 234-9157 Air / Fuel Ratio Sensor - Upstream

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9157 is an OE Style heated air/fuel ratio sensor built for direct replacement on select Nissan and INFINITI applications. It is precision-built for exact fitment and consistent signal response, making it a practical choice for upstream sensor replacement on the vehicles listed below.

The OE Style line focuses on factory-style replacement parts that match original fit and function. For buyers searching for an upstream air fuel ratio sensor for INFINITI Q50, INFINITI Q60, or Nissan Z applications, this Denso part number 234-9157 is built to meet the same installation and connection requirements as the original sensor.

Key Features

• Heated air/fuel ratio sensor for upstream placement
• Specific fit design for direct replacement
• 4-wire configuration with male connector
• Wiring harness length: 11.18
• Thread diameter: 0.709
• OE Style replacement from Denso

Detailed Description

Denso 234-9157 is manufactured and tested to OE-level standards for accurate replacement on emissions control systems. The sensor is built for exact fitment, which helps reduce installation issues caused by connector mismatch, thread variation, or harness length differences. This makes it a strong match for drivers looking for an upstream air/fuel ratio sensor for 2017-2024 INFINITI Q50, 2020-2022 INFINITI Q60, 2017-2019 INFINITI Q60, 2016 INFINITI Q50, and 2023-2024 Nissan Z applications.

This part cross-references Datsun/Nissan 226935CA0A and NTK 24789 for the same application. The Denso 234-9157 part number is also commonly searched by shoppers comparing OE-style replacement sensors for Nissan and INFINITI emissions repair work.

What It Helps Address

• Check engine light related to air/fuel ratio sensor faults
• Rough idle or unstable air-fuel readings
• Incorrect upstream sensor signal to the engine control system
• Emissions test failure caused by sensor performance issues
• Driveability problems tied to a worn or inaccurate sensor

Installation Notes and Tips

Confirm upstream location before ordering, since this sensor is listed for upstream use only. Verify connector style, thread diameter, and harness length against the original part before installation. For best results, inspect the wiring route and connector condition during replacement, and clear diagnostic trouble codes after the repair is complete.

Quality Assurance

Denso manufactures this OE Style sensor to strict original-equipment standards and tests each component for replacement accuracy and first-time fit. That OE-focused approach supports dependable installation on the listed INFINITI Q50, INFINITI Q60, and Nissan Z applications.