NTK 25227 Oxygen Sensor - Downstream Left

Direct-Fit Oxygen Sensor for Mercedes-Benz

NTK 25227 is a direct-fit heated oxygen sensor built for specific applications and threaded mounting. It is engineered for downstream left placement on select Mercedes-Benz models, including GLE400, GLE43 AMG, and GLS450 applications.

Key Features

• Direct-fit design for specific applications
• Heated oxygen sensor construction
• 4-wire configuration
• Threaded mounting type
• 18 mm thread diameter
• 9.09 in. wiring harness length

Detailed Description

NTK 25227 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific replacement and OE-style fit, form, and function. NTK is known for oxygen sensor manufacturing and uses ceramic technology control from raw material through finished production. This sensor is built for downstream left fitment on Mercedes-Benz GLE400, GLE43 AMG, GLS450, GL450, GLE450 AMG, and ML400 applications, making it a targeted replacement for vehicles that require the correct sensor configuration and connector layout. The part number 25227 is also referenced in OE-style interchange listings for related applications.

What It Is Used For

• Replacing a failed heated oxygen sensor
• Restoring proper exhaust gas monitoring
• Addressing sensor-related fault codes
• Correcting drivability issues tied to inaccurate air-fuel feedback
• Resolving emissions inspection concerns caused by sensor malfunction

Installation Notes and Tips

Verify the downstream left location, thread diameter, wire count, and harness length before installation. This is a specific-fit sensor, so matching the connector and mounting style to the original part is important. Confirm the vehicle application against the part number 25227 before ordering.

Quality Assurance

NTK tests oxygen sensors during manufacturing to meet or exceed OE specifications. As part of the NGK family and a major original equipment oxygen sensor supplier, NTK 25227 is produced with OE application standards in mind.