Denso 234-9155 Air / Fuel Ratio Sensor - Upstream Left, Upstream Rear or Upstream Right

Denso OE Style Air/Fuel Ratio Sensor 234-9155

Denso 234-9155 is an OE Style heated air/fuel ratio sensor built for exact replacement and first-time fit. It is made to the strict standards used for original equipment testing, making it a direct choice for drivers servicing upstream oxygen sensor-related drivability and emissions concerns on select Toyota and Lexus applications.

Key Features

• OE Style replacement air/fuel ratio sensor for specific applications
• Heated sensor design with 4-wire configuration
• Male connector with 13.46 in. wiring harness length
• Thread diameter: 0.708
• Built for exact replacement fit and consistent installation
• Cross-references NTK 24827 and 24851 for the same application

Product Details

This Denso air/fuel ratio sensor, part number 234-9155, is engineered for precise signal control in the exhaust stream and is used on select upstream and rear positions. The OE Style line focuses on direct-fit replacement parts that match the original application, helping maintain proper sensor response and factory-style integration. It is a specific-fit heated sensor for vehicles including 2015-2017 Toyota Camry, 2017-2018 Toyota Avalon, 2014-2016 Toyota Highlander, 2016 Toyota Sienna, 2015-2016 Toyota Venza, 2015 Lexus RX350, and 2016-2018 Lexus ES350.

Compatible vehicle search terms often include Toyota Camry upstream right air/fuel ratio sensor, Toyota Avalon upstream right oxygen sensor replacement, and Lexus ES350 upstream right sensor OE style. The Denso 234-9155 is also listed for 2017 Toyota Highlander upstream left and 2015 Lexus RX350 upstream rear applications.

Common Issues This Sensor May Address

• Check engine light related to air/fuel ratio or oxygen sensor faults
• Rough idle or inconsistent fuel trim readings
• Failed emissions inspection caused by sensor performance issues
• Slow sensor response or inaccurate exhaust feedback
• Replacement needs after sensor aging, contamination, or electrical failure

Installation Notes and Tips

Verify the exact year, make, model, and sensor position before ordering. This part is a specific-fit sensor, so connector style, wire count, and thread size should match the original unit. Confirm upstream right, upstream left, or upstream rear placement as listed for your vehicle, and compare the existing connector and harness length before installation.

Quality Assurance

Denso manufactures and tests this OE Style sensor to original-equipment standards for fit and performance consistency. The 234-9155 is built as a direct replacement part for the listed Toyota and Lexus applications, with precision construction intended to match the original sensor location and connection requirements.