NTK 24376 Air / Fuel Ratio Sensor - Upstream Left or Upstream Right

Direct-fit air/fuel ratio sensor

NTK 24376 is a specific-fit heated air/fuel ratio sensor for select Infiniti applications. It is built as a 5-wire sensor with a direct-fit design to match OE-style service requirements.

Key features

• Specific-fit replacement for targeted applications
• Heated sensor design for faster operating response
• 5-wire configuration for the correct signal setup
• 18 mm thread diameter with 0.38 thread length
• 18.75 wiring harness length for proper routing
• NTK 24376 part number for easy identification

Detailed fitment and design

NTK 24376 is engineered for direct replacement use on select 2011-2014 Infiniti M56, QX56, Q70, and QX80 applications. Fitment includes upstream left and upstream right positions, with notes identifying Bank 1 Sensor 1 and OE-spec air/fuel ratio applications. This part cross-references 226931LA0C and 226931MC0B for the same application. As part of NTK's Direct Fit 5-Wire A/F Sensor line, it reflects the brand's OE-focused sensor coverage and manufacturing approach for import and domestic vehicles.

Common issues this part can address

• Fault codes related to air/fuel ratio sensor performance
• Incorrect fuel trim readings from a worn sensor
• Slow sensor response during closed-loop operation
• Driveability concerns tied to inaccurate exhaust feedback
• Replacement needs for a failed upstream sensor

Installation notes and tips

Verify the connector, wire count, and thread dimensions before installation. Confirm the exact upstream left or upstream right application and match the vehicle notes to the original sensor location. Because this is a specific-fit sensor, use the listed fitment details for the correct Infiniti M56, QX56, Q70, or QX80 application.

Quality assurance

NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand also positions itself as a major original equipment sensor supplier, with OE-focused fit, form, and function.