NTK 24316 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Overview of NTK Direct Fit 5-Wire A/F Sensor 24316

The NTK Direct Fit 5-Wire Air/Fuel Ratio Sensor 24316 is designed for precise air-fuel mixture monitoring in select BMW and Buick models. This heated sensor ensures accurate emissions control and engine performance by providing real-time data to the vehicle's engine management system.

• Heated sensor type for faster response times
• Specific fit for BMW 545i, 645Ci, 745i, 745Li, X5 and Buick Allure, LaCrosse, Rendezvous
• 5-wire configuration for reliable signal transmission
• 23.5-inch wiring harness length for direct fit installation
• Thread diameter of 18.0 mm and thread length of 0.38 inches
• No mounting bracket included

Detailed Product Description

The NTK Direct Fit 5-Wire A/F Sensor 24316 is engineered to meet the exact specifications of certain BMW and Buick vehicles, including the BMW 545i, 645Ci, 745i, 745Li, and X5, as well as Buick Allure, LaCrosse, and Rendezvous models. This sensor features a heated element that allows it to reach optimal operating temperature quickly, improving the accuracy of air-fuel ratio readings. The 5-wire design supports stable and precise signal output, essential for maintaining proper engine combustion and emissions control.

The wiring harness length of 23.5 inches provides a direct fit installation without the need for extensions or modifications. The sensor’s thread diameter of 18.0 mm and thread length of 0.38 inches ensure compatibility with the factory mounting points. While this sensor does not include a mounting bracket, it is designed for straightforward replacement in vehicles specified by the fitment list.

About the Direct Fit 5-Wire A/F Sensor Product Line

The NTK Direct Fit 5-Wire A/F Sensor product line focuses on providing vehicle-specific air/fuel ratio sensors that simplify installation and maintain OEM-level performance. This line is tailored to deliver precise sensor readings through a 5-wire heated sensor design, which supports quicker warm-up times and consistent data output. The Direct Fit designation means these sensors are engineered to match the original equipment specifications for wiring harness length, thread size, and fitment, reducing installation complexity for professional technicians and DIY mechanics alike.

Common Applications and Issues Addressed

• Restores accurate air/fuel ratio readings for improved engine efficiency
• Helps resolve check engine light codes related to oxygen sensor faults
• Reduces emissions by ensuring proper fuel mixture control
• Improves fuel economy by maintaining optimal combustion
• Prevents drivability issues such as rough idling or hesitation

Installation Notes and Tips

• Verify vehicle compatibility with BMW 545i, 645Ci, 745i, 745Li, X5 or Buick Allure, LaCrosse, Rendezvous before installation
• Ensure the wiring harness length of 23.5 inches matches the factory harness routing
• Use proper tools to avoid damaging the 18.0 mm thread diameter during installation
• Do not reuse old mounting brackets as this sensor does not include one
• Follow manufacturer torque specifications to secure the sensor properly

Quality Assurance and Warranty

NTK sensors are manufactured to meet strict quality standards for durability and performance. The Direct Fit 5-Wire A/F Sensor 24316 undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details are not provided here, NTK typically offers coverage against defects in materials and workmanship. Consult the product packaging or NTK documentation for exact warranty terms.