Bosch 13640 Oxygen Sensor - Upstream Left

Bosch OE Oxygen Sensor for Mercedes-Benz SL500

Bosch 13640 is an Actual OE Oxygen Sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit, narrow-band heated sensor for the upstream left position on 1996-2002 Mercedes-Benz SL500 models.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Specific fit for 1996-2002 Mercedes-Benz SL500, upstream left
• Narrow-band heated oxygen sensor for closed-loop fuel control
• 4-wire design with round female connector and pin terminals
• Threaded mounting with 18 mm thread size and 22 mm hex
• Wiring harness included for direct replacement routing
• Metal housing with high-temperature-resistant construction

Product Line Details

Bosch Actual OE Oxygen Sensor parts are built from Bosch’s long-running OE sensor development. This line uses ceramic sensing elements and controlled heater operation to deliver stable signal response, faster warm-up, and accurate lambda feedback under changing exhaust temperatures. Bosch 13640 follows that OE-focused approach for Mercedes-Benz SL500 service work.

Detailed Description

Bosch 13640 is a replacement oxygen sensor for the upstream left location on 1996-2002 Mercedes-Benz SL500 vehicles. It measures exhaust oxygen content and sends a switching-type signal to the engine control unit, helping maintain stable combustion control and emissions performance. For Mercedes-Benz SL500 owners searching for an upstream left oxygen sensor, Bosch 13640 provides the OE-style fit and sensor configuration needed for direct service replacement.

This part cross-references Bosch 0005407517 for the same application.

Common Issues This Sensor Can Address

• Fault codes related to oxygen sensor response or heater circuit performance
• Rough idle caused by inaccurate air-fuel feedback
• Increased emissions from delayed closed-loop operation
• Fuel trim instability from a worn narrow-band sensor
• Slow sensor switching after extended heat cycling

Installation Notes and Tips

Confirm the upstream left location before ordering Bosch 13640. Verify the 18 mm threaded bung, 4-wire connector style, and harness routing against the original sensor on your Mercedes-Benz SL500. Inspect the exhaust threads and connector condition before installation, and clear diagnostic trouble codes after replacement if required by the vehicle repair procedure.

Quality Assurance

Bosch supplies this Actual OE Oxygen Sensor with OE-proven sensor design, heater control, and durable materials intended for demanding exhaust temperatures and vibration exposure. Bosch’s OE development history supports consistent signal accuracy and dependable replacement performance for the 1996-2002 Mercedes-Benz SL500 application.