Bosch 17203 Oxygen Sensor - Upstream

Overview of Bosch Actual OE Oxygen Sensor 17203

The Bosch Actual OE Oxygen Sensor 17203 is engineered specifically for Mercedes-Benz C250 and SLK250 models. This heated, wide-band oxygen sensor ensures precise air-fuel mixture readings to support optimal engine performance and emissions control.

• Heated oxygen sensor for faster response times
• Specific fit for Mercedes-Benz C250 and SLK250
• Wide-band sensor type for accurate air-fuel ratio monitoring
• 50-inch wiring harness with oblong male connector
• Threaded mounting type with 18 mm thread diameter
• Standard replacement grade with metal housing and steel finish
• Blade terminal type with 6 terminals and 5 wires
• Includes wiring harness for direct installation

Detailed Features and Specifications

The Bosch Actual OE Oxygen Sensor 17203 is a heated, wide-band sensor designed to provide reliable and accurate oxygen level readings in the exhaust system. Its 50-inch wiring harness with an oblong male connector and blade terminal type ensures a secure and precise electrical connection. The sensor features a threaded mounting type with an 18 mm thread diameter, allowing for straightforward installation in compatible Mercedes-Benz vehicles. Constructed with a durable metal housing and finished in steel, this sensor is built to withstand harsh engine conditions. The sensor includes 5 wires and 6 terminals, supporting complex signal transmission for enhanced engine management.

About the Bosch Actual OE Oxygen Sensor Line

The Actual OE Oxygen Sensor line by Bosch is designed to meet original equipment specifications, providing a direct replacement for factory-installed sensors. This product line focuses on delivering consistent performance and compatibility, ensuring that the sensor integrates seamlessly with the vehicle’s emission control system. The 17203 part number is part of this line, offering a standard replacement option for Mercedes-Benz C250 and SLK250 models.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Resolves check engine light issues related to oxygen sensor faults
• Helps reduce harmful emissions by maintaining proper combustion
• Prevents engine performance problems caused by faulty sensor data
• Supports smooth engine idling and acceleration response

Installation Notes and Tips

Installation of the Bosch Actual OE Oxygen Sensor 17203 requires removal of the old sensor and threading the new sensor into the exhaust manifold or pipe. Use a 22 mm hex socket for proper tightening. Ensure the wiring harness is routed away from hot engine components to prevent damage. The sensor’s heated feature allows for quicker activation, so verify electrical connections are secure before completing installation. No mounting bracket is included, as the sensor mounts directly via threading.

Quality Assurance and Warranty

Bosch manufactures the Actual OE Oxygen Sensor 17203 to meet strict quality standards, ensuring durability and reliable performance. The sensor is a standard replacement grade part designed to match OEM specifications. While specific warranty details are not provided here, Bosch typically offers limited warranties on their oxygen sensors to cover manufacturing defects.