Bosch 15974 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Reliable Oxygen Sensor for Lexus, Toyota, Pontiac, and Scion Vehicles

The Bosch Validated Oxygen Sensor 15974 is designed to provide accurate air-fuel mixture readings for improved engine performance and emissions control. This heated, wide-band oxygen sensor is compatible with a range of Lexus, Toyota, Pontiac, and Scion models, ensuring precise fitment and reliable operation.

• Heated oxygen sensor for faster warm-up and accurate readings
• Specific fitment for select Lexus, Toyota, Pontiac, and Scion models
• 12.5-inch wiring harness with 4 wires and blade terminals
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Durable metal housing with a rectangular male connector
• Wide-band sensor type for enhanced emission control
• Includes wiring harness for straightforward installation

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering sensors that meet strict OEM specifications for fit, form, and function. The 15974 sensor is engineered to provide reliable performance and durability, making it a suitable replacement part for emission control systems in various Lexus, Toyota, Pontiac, and Scion vehicles. This line emphasizes precise calibration and quality materials to maintain optimal engine efficiency and emissions compliance.

Product Details and Specifications

This Bosch oxygen sensor features a heated design to reduce warm-up time, allowing the engine control unit to receive accurate oxygen level data sooner. The sensor includes a 12.5-inch wiring harness with four wires terminated by blade terminals, ensuring secure electrical connections. Its metal housing and threaded mounting type (18 mm thread diameter) provide a robust and secure fit. The sensor’s rectangular male connector and male terminal gender are designed for specific vehicle applications, including models such as the Lexus GS350, Toyota Tacoma, and Pontiac Vibe. The wide-band sensor type supports precise air-fuel ratio monitoring, which is critical for emission control and fuel efficiency.

Common Applications and Issues Addressed

• Replacement for faulty or failing oxygen sensors in Lexus, Toyota, Pontiac, and Scion vehicles
• Helps resolve engine performance issues related to incorrect air-fuel mixture readings
• Reduces emissions by providing accurate data to the engine control unit
• Addresses check engine light triggers caused by oxygen sensor faults
• Improves fuel economy by optimizing combustion efficiency

Installation Notes and Tips

Installation requires a 22 mm oxygen sensor socket for removal and tightening. Ensure the sensor is threaded carefully to avoid cross-threading. The included wiring harness simplifies connection, but verify the rectangular male connector matches the vehicle’s harness. No mounting bracket is included, so use the existing mounting point. It is recommended to disconnect the battery before installation to prevent electrical shorts. After installation, clear any diagnostic trouble codes and verify sensor operation with a scan tool.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 15974 is manufactured to meet OEM standards for durability and performance. Bosch’s quality control processes ensure consistent sensor accuracy and longevity. While specific warranty details may vary, Bosch typically offers a limited warranty covering defects in materials and workmanship. Refer to Bosch’s official documentation for exact warranty terms.