- Direct OE replacement: Easy to install and designed to fit as a standard original equipment part. No modification required for proper installation. - OEM part numbers: 89465-35680 and 8946535680. - Compatibility: Fits Toyota FJ Cruiser, Hilux, 4Runner, and Land Cruiser Prado. Upstream oxygen sensor / air-fuel ratio sensor, new. - Function and benefits: Monitors exhaust oxygen content to help the engine control unit regulate the air-fuel ratio. This supports stable idle, better throttle response, improved fuel economy, and reduced emissions. - Quality and durability: Built to meet original equipment specifications with a durable housing and a high-quality sensing element for reliable performance in harsh exhaust environments. -Performance impact: Delivers accurate readings across operating ranges, contributing to efficient combustion and consistent engine management. - Use scenarios: - Replacing a failing oxygen sensor to restore fuel economy and prevent/clear check engine light on Toyota SUVs. - After a diagnostic indicating sensor fault, to ensure proper air-fuel ratio control on long trips or daily driving. - Routine maintenance for fleets or owners of Toyota FJ Cruiser, Hilux, 4Runner, or Prado seeking OEM-grade replacement parts. - Note: This sensor is designed for direct installation as an OEM-style replacement and does not require customization.