Bosch 16318 Oxygen Sensor - Downstream, Upstream or Upstream Left

Bosch Actual OE Oxygen Sensor for Mercedes-Benz

Bosch Part Number 16318 is an Actual OE Oxygen Sensor built for specific Mercedes-Benz applications that use a narrow-band heated sensor. It provides air-fuel-ratio feedback to the ECU for stable combustion control and emissions management across changing operating conditions.

For Mercedes-Benz owners looking for an OE-style replacement, Bosch 16318 uses a threaded mount, 4-wire configuration, round female connector, and included wiring harness for direct replacement on listed upstream and downstream positions.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated sensor design for closed-loop fuel control
• Specific fit application for listed Mercedes-Benz models
• 4-wire, 4-terminal configuration with round female connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing and high-temperature-resistant construction
• Wiring harness included

Product Details

Bosch 16318 is part of the Bosch Actual OE Oxygen Sensor line, which builds on Bosch’s long history of OE oxygen sensor development. The sensor uses a switching-type narrow-band design with a heated element to help the ECU maintain accurate air-fuel control after startup and during normal driving. Bosch’s ceramic sensing element and heater control are engineered for consistent response under heat and vibration, making this a practical replacement for Mercedes-Benz C240, C320, CLK320, CLK430, CLK55 AMG, CLK500, C32 AMG, G500, G55 AMG, ML500, R500, and SLK55 AMG applications listed below.

This part cross-references URO 0015407417 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Slow closed-loop operation after engine warm-up
• Emissions test failures tied to sensor response issues
• Rough combustion control caused by a worn upstream or downstream sensor

Installation Notes

Verify the sensor position before ordering, since this part is listed for upstream left, upstream, and downstream locations depending on the vehicle. Confirm connector shape, wire count, thread size, and harness length against the original sensor before installation. Use proper oxygen sensor service tools and inspect the exhaust bung threads for damage before threading in the replacement.

Compatible With: 2001-2005 Mercedes-Benz C240, Upstream Left; 2001-2005 Mercedes-Benz C320, Upstream Left; 2001-2005 Mercedes-Benz CLK320, Upstream Left; 2001-2003 Mercedes-Benz CLK430, Upstream Left; 2001-2004 Mercedes-Benz CLK55 AMG, Upstream Left; 2002-2004 Mercedes-Benz C32 AMG, Upstream Left; 2002-2003 Mercedes-Benz G500, Upstream; 2003-2006 Mercedes-Benz CLK500, Upstream Left; 2003-2011 Mercedes-Benz G55 AMG, Downstream; 2004 Mercedes-Benz CLK55 AMG, Upstream Left, to 02/2004; 2004 Mercedes-Benz G500, Upstream, to Chassis # 144225; 2005-2011 Mercedes-Benz SLK55 AMG, Upstream Left; 2006-2007 Mercedes-Benz ML500, Upstream Left; 2006-2007 Mercedes-Benz R500, Upstream Left; 2004-2008 Mercedes-Benz G500, Downstream, from Chassis # 144226.

Quality Assurance

Bosch supplies oxygen sensors with OE development experience and application-specific engineering for accurate signal output and durable service in demanding exhaust environments. Bosch 16318 is built as an OE-style replacement for the listed Mercedes-Benz applications.