NTK 25596 Oxygen Sensor - Downstream Left

Direct-Fit Oxygen Sensor for Mercedes-Benz

This NTK oxygen sensor is a specific-fit replacement built for downstream left applications on select Mercedes-Benz models. It uses a heated, threaded design with a 4-wire configuration and a 12.75-inch harness for OE-style serviceability.

Key Features

• Direct Fit Oxygen Sensor line for specific applications
• Heated sensor design for faster operating response
• 4-wire construction with a 12.75-inch wiring harness
• Threaded mounting with an 18 mm thread diameter
• Engineered for OE fit, form, and function

Detailed Description

NTK 25596 is a direct-fit oxygen sensor developed for downstream left placement on 1998-2000 Mercedes-Benz C280, C43 AMG, CLK320, and CLK430 applications. As part of NTK's Direct Fit Oxygen Sensor line, this unit is built to match the original sensor style and connection layout for straightforward replacement service. NTK 25596 is designed for vehicles that require a heated, threaded oxygen sensor with the specified harness length and wire count.

NTK is known for oxygen sensor manufacturing and OE application coverage, and this part reflects that focus with manufacturing controls intended to meet or exceed OE specifications. This part cross-references Bosch 15094 and Delphi ES10584 for the same application.

What It Is Used For

• Replacing a failed downstream oxygen sensor
• Restoring proper exhaust gas feedback to the engine control system
• Addressing sensor-related fault codes or emissions warnings
• Correcting drivability issues caused by inaccurate oxygen readings
• Servicing a specific-fit sensor location without universal adaptation

Installation Notes and Tips

Verify the connector, wire count, thread diameter, and harness length before installation. Confirm the downstream left position and B2S2 application notes for the exact vehicle configuration. Use the vehicle service information to match the original sensor location and routing before tightening the threaded sensor into place.

Quality Assurance

NTK tests these oxygen sensors during manufacturing to support reliability and OE-level specification compliance. The brand's OE sensor manufacturing background and direct-fit product strategy support consistent fitment for the listed Mercedes-Benz applications.