Bosch 13893 Oxygen Sensor - Upstream

Bosch 13893 OE Oxygen Sensor for Mercedes-Benz

Bosch 13893 is an Actual OE Oxygen Sensor built for precise air-fuel-ratio feedback to the ECU. It is a narrow-band heated sensor with a threaded mount, round connector, and specific-fit wiring harness for direct replacement service on select Mercedes-Benz applications.

Fits 1998-2000 Mercedes-Benz SLK230, upstream. This Bosch oxygen sensor supports stable closed-loop fuel control and accurate lambda monitoring in normal driving and high-temperature operating conditions.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Part number: 13893
• Narrow-band heated oxygen sensor design
• Specific fit with included wiring harness
• 4-wire, 4-terminal configuration
• Threaded mounting with 18 mm thread diameter
• 22 mm hex size for service removal
• Round female connector
• Steel finish with metal housing

Product Details

Bosch developed its oxygen sensor technology from early thimble-style designs to later planar narrowband sensors that respond faster and reach operating temperature quickly. Bosch 13893 uses advanced ceramic elements, controlled heater operation, and heat-resistant materials to maintain consistent signal output under thermal cycling and vibration. For Mercedes-Benz SLK230 upstream service, this sensor helps the ECU maintain the correct air-fuel mixture during warm-up and steady-state operation. Part number 13893 is also referenced for OE-style replacement needs where accurate switching-type O2 sensor performance is required.

This part cross-references 0005406217 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rich or lean fuel trim conditions
• Slow or unstable closed-loop fuel control
• Reduced emissions performance from a worn upstream sensor
• Delayed sensor response during warm-up

Installation Notes

Install in the upstream location specified for 1998-2000 Mercedes-Benz SLK230 applications. Verify connector shape, wire count, and thread size before installation. Use the correct oxygen sensor socket or 22 mm hex tool, and inspect the exhaust bung threads and harness routing before final tightening. Confirm the sensor is seated on the sealing surface and the wiring is kept clear of exhaust heat.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The design reflects OE-proven sensor architecture used to deliver accurate feedback for emissions control and combustion management.