Bosch 15090 Oxygen Sensor - Upstream Right

Bosch OE Oxygen Sensor for Mercedes-Benz

Bosch 15090 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for select Mercedes-Benz applications, including upstream right positions on C280, C43 AMG, CLK320, and CLK430 models.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated design for closed-loop fuel control
• Specific fit with threaded mounting
• 4-wire configuration with included wiring harness
• Round female connector with pin terminals
• 18 mm thread diameter and 22 mm hex size
• High-temperature-resistant construction for demanding exhaust conditions

Product Details

Bosch 15090 uses a switching-type sensing element to deliver accurate oxygen content readings to the engine control unit, helping maintain stable combustion and emissions control. Bosch’s OE development history includes early thimble-style sensors and later planar narrowband designs, and this sensor reflects that experience with faster light-off characteristics, improved lambda accuracy, and quicker closed-loop operation. For Mercedes-Benz owners searching for an upstream right oxygen sensor replacement for 1998-2000 C280, C43 AMG, CLK320, or 1999-2000 CLK430, this part provides an OE-style solution backed by Bosch engineering.

This part cross-references Mercedes-Benz 0015401017 and 0015401117 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rich or lean fuel mixture readings
• Delayed closed-loop fuel control after startup
• Reduced fuel economy caused by inaccurate exhaust feedback
• Emissions test failures tied to sensor response issues

Installation Notes and Tips

Fits 1998-2000 Mercedes-Benz C280, upstream right. Fits 1998-2000 Mercedes-Benz C43 AMG, upstream right. Fits 1998-2000 Mercedes-Benz CLK320, upstream right. Fits 1999-2000 Mercedes-Benz CLK430, upstream right. Confirm the connector shape, wire count, and threaded mounting style before installation. Because this is a heated narrow-band sensor, proper routing of the included harness and secure connector engagement are important for stable signal output.

Quality Assurance

Bosch supplies this Actual OE Oxygen Sensor using OE-proven design principles and durable materials selected for heat and vibration resistance. Bosch’s long-standing OE development background supports consistent sensor performance across a wide range of operating conditions.