Bosch 18175 Oxygen Sensor - Downstream

Reliable Oxygen Sensor for Subaru Forester and WRX

The Bosch Validated Oxygen Sensor 18175 is designed specifically for Subaru Forester and WRX models, ensuring precise emission control and optimal engine performance. This narrow-band heated oxygen sensor provides accurate air-fuel mixture readings to help maintain efficient combustion.

• Specific fit for Subaru Forester and WRX vehicles
• Heated narrow-band oxygen sensor for faster response
• 7.4-inch wiring harness length with 4 wires and blade terminals
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Durable metal housing with oblong female connector
• Standard replacement grade for reliable performance
• Overall length of 10.8 inches and 9.6 inches from sealing surface to connector end

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering sensors that meet strict quality and performance standards. These sensors are engineered to provide accurate oxygen level readings, which are critical for emission control systems. The 18175 part number is part of this line, offering a specific fit and reliable heated sensor technology for Subaru vehicles.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated design, which allows it to reach operating temperature quickly for accurate air-fuel ratio monitoring. The sensor includes a 7.4-inch wiring harness with four wires and blade-type terminals, ensuring secure electrical connections. The oblong female connector and female terminals provide compatibility with the vehicle's wiring system. The sensor mounts via a threaded 18 mm diameter fitting and uses a 22 mm hex size for installation. Constructed with a metal housing finished in steel, it weighs approximately 0.33 pounds and measures 10.8 inches in overall length.

Common Applications and Issues Addressed

• Restores proper air-fuel mixture readings for Subaru Forester and WRX
• Helps resolve engine performance issues related to faulty oxygen sensors
• Reduces emissions by ensuring accurate sensor data to the ECU
• Prevents check engine light triggers caused by sensor failure
• Improves fuel efficiency by maintaining correct combustion parameters

Installation Notes and Tips

When installing the Bosch 18175 oxygen sensor, ensure the vehicle is cool to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the wiring harness length and connector type match the vehicle’s specifications. Do not overtighten the sensor; follow the manufacturer’s torque recommendations. Since this sensor is a specific fit for Subaru Forester and WRX models, confirm compatibility before installation.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet OEM standards for durability and performance. The Bosch Validated Oxygen Sensor 18175 undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details are not provided here, Bosch typically offers a limited warranty on their emission control sensors. Refer to Bosch or vehicle manufacturer documentation for exact warranty terms.