Bosch 13782 Oxygen Sensor - Downstream, Downstream Right, Upstream or Upstream Right

Bosch Actual OE Oxygen Sensor 13782

Bosch 13782 is a specific-fit, narrow-band heated oxygen sensor built for Mercedes-Benz applications that require accurate air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management across changing operating conditions, including downstream and upstream locations on select CL500, ML55 AMG, SL600, E320, E430, ML320, ML430, S430, S500, SLK230, CL600, S420, S600, SL500, E420, and SL320 models.

The Bosch Actual OE Oxygen Sensor line reflects Bosch’s long OE development history, with ceramic sensing elements, controlled heater operation, and high-temperature materials used to maintain consistent signal quality under heat and vibration. Part number 13782 is a direct-fit replacement for vehicles that use a 4-wire, threaded, narrow-band sensor with a round female connector and included wiring harness.

Key Features

• Specific-fit Bosch oxygen sensor for select Mercedes-Benz emissions systems
• Narrow-band heated design for closed-loop fuel control
• 4-wire configuration with round female connector
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Wiring harness included for direct replacement use
• Standard replacement grade for OE-style service work
• Bosch part number 13782 for catalog and cross-reference lookup

Detailed Description

Bosch 13782 is an Actual OE Oxygen Sensor engineered for precise switching-type signal output in Mercedes-Benz exhaust systems. It measures oxygen content in the exhaust stream so the ECU can adjust fuel delivery and maintain proper combustion balance. This helps the engine manage emissions and drivability in both upstream and downstream sensor positions, depending on the vehicle application. Bosch’s narrow-band heated sensor design uses a ceramic sensing element and optimized heater control to reach operating temperature quickly and maintain stable performance during normal driving and thermal cycling. This part cross-references Bosch OE-style applications such as 0005407117 and 0005408117 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate exhaust oxygen readings
• Fuel trim issues from delayed or unstable sensor response
• Emissions test failures tied to faulty air-fuel feedback
• Slow closed-loop operation after startup

Installation Notes and Tips

• Verify the sensor position before ordering; this part is used in upstream, downstream, downstream right, and upstream right locations on listed Mercedes-Benz applications.
• Confirm the connector shape, wire count, and thread size match the original sensor.
• Inspect the exhaust bung threads and clean carbon buildup before installation.
• Apply proper sensor removal practices to avoid damaging the exhaust pipe or harness routing.
• Clear diagnostic trouble codes and confirm live data after installation.

Quality Assurance

Bosch supplies this oxygen sensor as an OE-proven replacement backed by more than five decades of oxygen-sensor development. The Bosch Actual OE Oxygen Sensor 13782 is built to the same functional standards expected in Mercedes-Benz emissions control systems and is intended for direct replacement service on listed applications.