Bosch 15083 Oxygen Sensor - Upstream

Bosch OE Oxygen Sensor for Mercedes-Benz C230

Bosch 15083 is an Actual OE Oxygen Sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management on the 1997-2000 Mercedes-Benz C230, Upstream, with narrow-band heated operation for consistent closed-loop performance.

Key Features

• Fits 1997-2000 Mercedes-Benz C230, Upstream
• Narrow-band heated oxygen sensor with threaded mounting
• Specific-fit design with 4-wire harness and round female connector
• 18 mm thread diameter and 22 mm hex size for service replacement
• Wiring harness included; harness length measures 42.4 in
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Bosch 15083 is part of Bosch’s Actual OE Oxygen Sensor line

Product Details

Bosch developed its oxygen sensor technology from early OE designs and later planar narrowband sensor architecture to improve light-off response, lambda accuracy, and closed-loop operation. Bosch 15083 uses a heated narrow-band sensing element with optimized heater control to deliver steady signal output across changing exhaust temperatures. For Mercedes-Benz C230 owners, this Bosch oxygen sensor provides the OE-style signal quality expected for upstream fuel-trim control and emissions monitoring. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part Can Address

• Check engine light related to oxygen sensor performance
• Unstable air-fuel ratio feedback to the ECU
• Delayed closed-loop operation after startup
• Rough combustion control caused by an aging upstream sensor
• Emissions test failure tied to sensor response or accuracy

Installation Notes and Tips

Confirm the upstream location before installation and verify connector shape, wire count, and thread size against the original sensor. Use proper oxygen sensor service tools to avoid damaging the threaded bung or sensor body. Inspect the harness routing so the lead is kept clear of exhaust heat and moving components. Bosch 15083 is a specific-fit replacement for the listed Mercedes-Benz C230 applications.

Quality Assurance

Bosch supplies this oxygen sensor as an OE-proven replacement backed by more than five decades of oxygen sensor development and aftermarket support. Bosch 15083 is engineered to meet the performance expectations associated with Bosch’s Actual OE Oxygen Sensor line.