Bosch 13798 Oxygen Sensor

Bosch Actual OE Oxygen Sensor 13798

Bosch 13798 is a specific-fit, narrow-band heated oxygen sensor built for precise air-fuel ratio feedback to the ECU. It is a direct replacement for select Mercedes-Benz applications, including E320, E430, E55 AMG, CL500, E420, S420, and S500 positions listed below.

The Bosch Actual OE Oxygen Sensor line draws on Bosch’s long OE development history, including early thimble-sensor designs and later planar narrowband technology. This sensor uses a threaded metal housing, a round female connector, and an included wiring harness for a clean replacement on the original mounting location.

• Specific-fit Bosch oxygen sensor for select Mercedes-Benz models
• Narrow-band heated O2 sensor for closed-loop fuel control
• 4-wire design with pin terminals and round female connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness length: 19.7 in; overall length: 23.4 in
• Standard replacement grade for OE-style service work
• Bosch part number 13798 for catalog and cross-reference use

OE-Style Sensor Performance

Bosch 13798 is engineered to provide accurate oxygen-content feedback so the engine control unit can maintain stable combustion control and emissions performance. The heated narrow-band design helps the sensor reach operating temperature quickly, while the ceramic sensing element and high-temperature materials support consistent operation under heat and vibration. This Bosch Actual OE Oxygen Sensor is a direct service part for Mercedes-Benz E320, E430, E55 AMG, CL500, E420, S420, and S500 applications where the original sensor location and connector style must match.

This part cross-references Mercedes-Benz 0005408517 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor circuit faults
• Rich or lean fuel trim readings caused by aging sensor response
• Slow closed-loop transition after startup
• Reduced emissions performance from inaccurate exhaust feedback
• Rough idle or drivability issues tied to incorrect air-fuel correction

Installation Notes

Verify the connector shape, wire count, thread size, and sensor position before installation. This Bosch 13798 uses a threaded mount, 4-wire configuration, and included harness, so the replacement should match the original routing and connector layout. Use the listed fitment by year, model, and position: Fits 1998-2000 Mercedes-Benz E320, Upstream Right; Fits 2000 Mercedes-Benz E430, Upstream Right; Fits 1998-1999 Mercedes-Benz CL500, Downstream Left; Fits 1998-1999 Mercedes-Benz E430, Upstream Left; Fits 1999 Mercedes-Benz E55 AMG, Upstream Left; Fits 1999 Mercedes-Benz E55 AMG, Upstream; Fits 1996-1999 Mercedes-Benz S420, Downstream Left; Fits 1996-1999 Mercedes-Benz S500, Downstream Left; Fits 1997 Mercedes-Benz E420, Upstream Left.

Quality Assurance

Bosch supplies this Actual OE Oxygen Sensor as part of its OE-focused aftermarket line, using the same engineering approach that has supported vehicle manufacturers for decades. The sensor is built with durable materials and heater control designed for consistent signal accuracy in demanding exhaust conditions.