Bosch 15501 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Subaru Vehicles

The Bosch Validated Oxygen Sensor 15501 is designed specifically for select Subaru models, including the Baja, Forester, Impreza, Legacy, and Outback. This heated, wide-band oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions control.

• Heated oxygen sensor for faster warm-up and accurate readings
• Specific fit for Subaru Baja, Forester, Impreza, Legacy, and Outback
• Wide-band sensor type for precise air-fuel ratio monitoring
• 19.8-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 steel finish
• Rectangle female connector included with wiring harness

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering reliable, vehicle-specific sensors that meet OEM standards. This line emphasizes precise fitment and consistent performance, making it suitable for emission control systems requiring accurate oxygen level detection. The 15501 sensor is part of this line, ensuring compatibility and quality for Subaru models.

Product Details and Specifications

This oxygen sensor features a heated design to reduce warm-up time, allowing the engine control unit to receive accurate data quickly. The wide-band sensor type provides a broad measurement range for improved fuel efficiency and reduced emissions. With a 19.8-inch wiring harness and a 4-wire configuration, it includes a rectangle-shaped female connector with blade terminals for secure electrical connections. The sensor mounts via a threaded 18 mm diameter fitting and uses a 22 mm hex size for installation. The metal housing with a steel finish offers durability under harsh engine conditions.

Common Applications and Problem Solving

• Restores proper air-fuel ratio readings for Subaru Baja, Forester, Impreza, Legacy, and Outback
• Resolves check engine light issues related to oxygen sensor faults
• Improves fuel economy by providing accurate sensor data
• Reduces harmful emissions by ensuring correct sensor operation
• Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

Ensure the vehicle is cool before removing the old oxygen sensor to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the connector type matches the vehicle harness before installation. The 19.8-inch wiring harness length provides flexibility for routing. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 15501 is manufactured to meet OEM standards for fit and function. Bosch provides quality assurance through rigorous testing to ensure durability and performance. While specific warranty details may vary, Bosch sensors typically come with a limited warranty covering defects in materials and workmanship.