Bosch 13146 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Mercedes-Benz 300 Series

The Bosch Actual OE Oxygen Sensor 13146 is designed specifically for select Mercedes-Benz models including the 300CE, 300E, 300SE, 300SEL, and 300TE. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance by precisely monitoring exhaust gases.

• Brand: Bosch, Brand Line: Actual OE Oxygen Sensor
• Part Number: 13146
• Wiring Harness Length: 27 inches
• Terminal Type: Blade pin with 3 terminals
• Connector Shape: Rectangle/round with male and female terminals
• Overall Length: 30.7 inches
• Mounting Type: Threaded with 18 mm thread diameter and 22 mm hex size
• Heated narrow-band oxygen sensor for improved response time
• Housing Material: Durable metal with steel finish
• Wire Quantity: 3 wires included with wiring harness

About the Bosch Actual OE Oxygen Sensor Line

The Bosch Actual OE Oxygen Sensor product line focuses on delivering direct replacement sensors that meet original equipment specifications. This ensures compatibility and reliable performance for vehicles requiring precise emissions monitoring. The 13146 sensor is engineered to match the exact fit and function for specific Mercedes-Benz 300 series models, maintaining factory standards for durability and accuracy.

Detailed Product Description

This Bosch oxygen sensor features a heated narrow-band design, which allows it to reach operating temperature quickly for accurate air-fuel mixture readings. The sensor includes a 27-inch wiring harness with three wires and blade pin terminals, designed for a specific fit rather than universal application. Its threaded mounting type with an 18 mm diameter and 22 mm hex size ensures secure installation in the exhaust system. The metal housing with a steel finish provides durability against harsh engine conditions. Connector terminals are both male and female, with a rectangular and round shape to ensure proper connection and signal transmission.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for Mercedes-Benz 300CE, 300E, 300SE, 300SEL, and 300TE models
• Helps resolve engine performance issues related to incorrect air-fuel mixture
• Reduces emissions by providing precise exhaust gas data to the engine control unit
• Eliminates check engine light triggers caused by faulty oxygen sensors
• Improves fuel efficiency by maintaining proper combustion control

Installation Notes and Tips

Ensure the vehicle is cooled down before removing the old oxygen sensor 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 original sensor to avoid fitment issues. Thread the sensor carefully to prevent cross-threading and tighten to manufacturer torque specifications. Since this sensor is a specific fit for Mercedes-Benz 300 series models, confirm compatibility with your exact model and year before installation.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet or exceed OEM standards for quality and reliability. The Actual OE Oxygen Sensor line undergoes rigorous testing to ensure consistent performance and durability. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control sensors. Refer to Bosch or your parts provider for exact warranty terms related to part number 13146.