Bosch 13702 Oxygen Sensor - Upstream

Bosch 13702 Oxygen Sensor for Subaru Upstream Applications

Bosch 13702 is an Actual OE Oxygen Sensor for upstream emission control service on select Subaru vehicles. It is built for direct replacement use where accurate exhaust oxygen feedback is needed for engine management and emissions monitoring.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Upstream position for exhaust gas monitoring before the catalytic converter
• Direct-fit service part for select Subaru Forester, Impreza, and Legacy applications
• Supports precise air-fuel ratio feedback to the engine control system
• Part number 13702 for easy identification and ordering

Detailed Description

Bosch Actual OE Oxygen Sensor 13702 is engineered for Subaru upstream sensor locations across 1996-1999 Legacy, 1998-1999 Forester, and 1998-1999 Impreza applications, with 1999 Impreza and 1999 Legacy listings noted for vehicles without California Emission System. As an OE-style emission control sensor, it helps the vehicle’s control module read exhaust oxygen content and adjust fueling accordingly. This part number 13702 is a direct replacement choice for drivers servicing Subaru Forester, Impreza, or Legacy models that require an upstream oxygen sensor.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings
• Reduced fuel control accuracy from a worn upstream sensor
• Emission monitoring faults tied to exhaust feedback
• Driveability issues caused by delayed sensor response

Installation Notes and Tips

Install in the upstream sensor location only and verify exact year, model, and emission configuration before ordering. For 1999 Subaru Impreza and 1999 Subaru Legacy, confirm the vehicle is without California Emission System. Use the vehicle’s existing connector and routing as a reference during replacement, and inspect nearby exhaust threads and wiring before installation.

Quality Assurance

Bosch’s Actual OE Oxygen Sensor line is positioned as an OE-level replacement option for emission control service. This part cross-references no additional part numbers in the provided data.