Bosch 16438 Oxygen Sensor - Downstream or Upstream

Reliable Oxygen Sensor for Mercedes-Benz Vehicles

The Bosch Actual OE Oxygen Sensor 16438 is designed specifically for select Mercedes-Benz models, including the CL65 AMG, CL600, E280, E300, E350, E550, S65 AMG, and S600. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance.

• Brand: Bosch
• Brand Line: Actual OE Oxygen Sensor
• Part Number: 16438
• Fitment: Mercedes-Benz CL65 AMG, CL600, E280, E300, E350, E550, S65 AMG, S600
• Oxygen Sensor Type: Narrow-band heated
• Wiring Harness Length: 14.8 inches
• Overall Length: 18.1 inches
• Thread Size: 18 mm diameter, 22 mm hex size
• Connector: Female, round shape with 4 terminals and pins
• Mounting Type: Threaded
• Housing Material: Metal with steel finish
• Wire Quantity: 4
• Wiring Harness Included

About the Bosch Actual OE Oxygen Sensor Line

The Actual OE Oxygen Sensor line by Bosch is engineered to meet original equipment specifications, providing a direct replacement for factory-installed sensors. This ensures compatibility and reliable performance for emission control systems in Mercedes-Benz vehicles. The 16438 sensor maintains the integrity of the vehicle’s exhaust monitoring system with precise narrow-band heated sensing technology.

Product Details and Specifications

This Bosch oxygen sensor features a threaded mounting type with an 18 mm thread diameter and a 22 mm hex size for secure installation. The sensor includes a 14.8-inch wiring harness and a total length of 18.1 inches, allowing for proper fitment in the specified Mercedes-Benz models. The connector is female with a round shape and four terminals, designed for a specific fit rather than universal application. The sensor is constructed with a durable metal housing finished in steel, supporting long-term durability under high-temperature exhaust conditions.

Common Applications and Issues Addressed

• Restores accurate air-fuel mixture readings for improved engine efficiency
• Helps resolve check engine light triggers related to oxygen sensor faults
• Reduces emissions by ensuring proper exhaust gas monitoring
• Prevents poor fuel economy caused by faulty sensor readings
• Supports smooth engine idling and performance in Mercedes-Benz models

Installation Notes and Tips

Installation requires a 22 mm oxygen sensor socket or wrench. Ensure the vehicle is cool before removal to avoid burns. The sensor’s threaded design allows for straightforward replacement, but care should be taken to avoid cross-threading. The wiring harness included should be connected securely to the female round connector with four terminals. No mounting bracket is included, so use the existing mounting point on the vehicle.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards and are designed as standard replacement parts. The Actual OE Oxygen Sensor 16438 undergoes rigorous testing to ensure reliable performance and durability. While specific warranty details are not provided here, Bosch typically offers coverage consistent with OEM replacement parts.