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 Subaru Legacy 1991-1994 Direct Fit Oxygen Sensor (Part #24524) is engineered to ensure optimal engine performance, fuel efficiency, and emissions control. As a critical component of your vehicle's on-board diagnostic system, this sensor provides continuous feedback to the engine control unit (ECU), helping to maintain the ideal air-fuel mixture for efficient combustion. Designed with advanced ceramic sensor elements, it features a three-stage contaminant-resistant plasma jet and deposit trap overcoat, which protects against sensor poisoning and prolongs sensor life. This innovative technology ensures reliable operation even in challenging environments, reducing the need for frequent replacements and maintaining your vehicle’s emissions compliance.

Constructed by NTK, the world's largest OEM oxygen sensor supplier and manufacturer, this sensor adheres to strict quality standards and integrates seamlessly with Subaru Legacy models from 1991 to 1994. It is a direct fit replacement, simplifying installation and ensuring proper function without the need for additional modifications. The sensor’s precise design and manufacturing process, from raw material to finished product, reflect NTK's commitment to excellence and durability. Regular use of this sensor can help your vehicle achieve better fuel economy, smoother engine operation, and reduced emissions, contributing to environmental compliance and performance longevity.

This oxygen sensor is ideal for automotive repair professionals and DIY enthusiasts seeking a reliable, high-quality replacement that meets OE specifications. It is not approved for CARB compliance but respects Prop 65 regulations, ensuring safety and environmental standards are met. Whether you are performing routine maintenance or troubleshooting engine issues related to emissions, the NGK Subaru Legacy oxygen sensor offers a dependable solution that supports your vehicle’s performance and emissions systems, ensuring compliance and peace of mind.

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