NTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle's on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology. NTK is constantly improving sensor designs to provide excellent performance and improve resistance to failure. NTK works with their OEM manufacturers through each phase of development from concept to production.

ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning

The NGK Mercedes-Benz 300SL and 500SL oxygen sensor, part number 25520, provides precise monitoring of exhaust gases to ensure optimal engine performance and emissions compliance. Designed for direct installation, this OEM-quality sensor seamlessly integrates with your vehicle's existing systems, offering reliable and consistent feedback to the engine control unit (ECU). Its advanced ceramic sensor element features a 3-stage contaminant-resistant plasma jet and deposit trap overcoat, effectively protecting against poisoning and extending sensor lifespan. This robust design helps maintain the correct air-fuel mixture, maximizing fuel efficiency while reducing harmful emissions.
NGK's commitment to quality and innovation ensures each sensor undergoes rigorous development and testing, working closely with OEM manufacturers from concept to production. This focus on durability, performance, and resistance to failure makes the sensor an excellent replacement option for your Mercedes-Benz 300SL or 500SL. Easy to install and built to meet or exceed OE standards, this sensor is essential for maintaining your vehicle's emissions system and engine health.
Please verify fitment for your specific model year to ensure compatibility. This product is suitable for use in vehicles with Prop 65 compliance and is not restricted for air freight. Keep your vehicle running smoothly and efficiently with the trusted quality of NGK.

Features: