Bosch 13308 Oxygen Sensor - Upstream

Bosch Actual OE Oxygen Sensor for Volvo 240

Bosch 13308 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for the 1993 Volvo 240, upstream, and uses a threaded mounting design with a 3-wire harness for direct service replacement.

As part of Bosch’s Actual OE Oxygen Sensor line, this sensor reflects Bosch’s long OE development history in oxygen sensing technology. The design uses advanced ceramic sensing elements, controlled heater operation, and high-temperature-resistant materials to support stable closed-loop fuel control under demanding exhaust heat and vibration.

Key Features

• Part number 13308
• Specific-fit oxygen sensor for the 1993 Volvo 240, upstream
• Narrow-band heated sensor for standard replacement service
• 3-wire configuration with included wiring harness
• Threaded mount with 18 mm thread diameter and 22 mm hex size
• Female connector with rectangle/round connector shape
• Metal housing for durability in exhaust service conditions
• Wiring harness length: 63 in; overall length: 66.7 in

Product Details

Bosch 13308 is an OE-style switching oxygen sensor that measures exhaust oxygen content and sends feedback to the engine control unit for fuel-trim correction. For the 1993 Volvo 240, upstream placement means it serves the primary sensor position used for mixture control. This part cross-references Monroe Shocks & Struts (e.g., 6842910) for the same application.

Built as a narrow-band heated oxygen sensor, Bosch 13308 is suited for vehicles that rely on fast sensor warm-up and consistent signal output during normal driving and temperature changes. The Bosch Actual OE Oxygen Sensor line is based on Bosch’s original oxygen sensor development and later planar narrowband designs, which improved light-off speed and closed-loop response.

Common Issues This Sensor May Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate air-fuel feedback
• Excess fuel consumption from delayed or unstable sensor signal
• Failed emissions inspection tied to sensor response problems
• Slow closed-loop operation after cold start

Installation Notes and Tips

Verify the upstream sensor location before installation on the 1993 Volvo 240. Confirm the 18 mm thread size, 22 mm hex size, and 3-wire connector style match the original sensor before removal. Because oxygen sensors are exposed to heat and corrosion, use proper exhaust sensor service practices and inspect the harness routing to avoid strain on the connector.

For best results, clear diagnostic trouble codes after installation and confirm fuel-trim and sensor activity with a scan tool. Bosch 13308 is a direct replacement for the listed application and should be matched to the vehicle’s original sensor configuration.

Quality Assurance

Bosch supplies oxygen sensors with OE development experience and materials selected for high-temperature exhaust environments. Bosch 13308 is part of the Actual OE Oxygen Sensor line, built to deliver consistent signal accuracy and durable service in the 1993 Volvo 240, upstream application.