O2 Oxygen Sensor Downstream for Toyota Prius Camry Sienna

Precision Downstream Exhaust Monitoring: Optimized for Toyota’s MZ, NZ, and ZZ Platforms

Who It’s For: Engineered specifically for Toyota owners running the 3.0L V6 (1MZ-FE / 3VZ-FE), the 1.5L Hybrid (1NZ-FXE), and the high-revving 1.8L (1ZZ-FE / 2ZZ-GE) engines. If your diagnostic port is throwing P0420 codes or your fuel economy has tanked, your downstream monitoring system is failing to communicate with the ECU.

The Symptom: The downstream oxygen sensor serves as the final auditor of your engine’s combustion efficiency. When the factory sensor on your [Engine Code] becomes fouled by carbon deposits or heat-cycled to the point of failure, it sends erratic voltage signals to the computer. This causes the ECU to default to "Safe Mode," often resulting in a rich-running condition that makes the vehicle feel heavy, unresponsive during highway merging, and significantly increases emissions output.

The Engineering Fix: This 4-wire downstream sensor utilizes a high-grade zirconia ceramic element to detect the differential between ambient oxygen and exhaust gas oxygen concentrations. By providing a stable, low-latency voltage signal, it allows the ECU to verify that the catalytic converter is processing hydrocarbons correctly. Our replacement sensors feature a precision-wound internal heater that reaches operating temperature in seconds, ensuring your Toyota transitions from open-loop to closed-loop fueling as quickly as possible for maximum efficiency.

Why Mechanics Choose This Kit

• [Restored Fuel Mapping]: By providing accurate post-catalyst data, the ECU can fine-trim long-term fuel ratios, which is critical for the 1NZ-FXE hybrid systems to maintain their legendary MPG.
• [Rapid Thermal Response]: The integrated heater circuit prevents "lazy" sensor syndrome, a common issue on the 1MZ-FE V6 engines where the sensor fails to stay hot enough at idle to provide a reading.
• [OEM-Grade Construction]: Built with a dual-layer protection shield to prevent silicone and lead poisoning of the sensor element, extending the service life under high-heat racing or towing conditions.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• 1992-1996 Toyota Camry 3.0L V6
• 2005-2009 Toyota Prius 1.5L L4
• 1998 Toyota Sienna 3.0L V6
• 2000-2005 Toyota Celica 1.8L L4
• 2005-2006 Toyota Matrix 1.8L L4

Interchange Part Numbers:

SG358, 24605, 13353, 15273

The Performance Promise

Package includes four (4) Oxygen Sensors for fleet maintenance or full exhaust overhaul. Downstream location is critical for passing emissions and ensuring your engine’s long-term health. Replace your aged sensors today to restore the crisp throttle response your Toyota had from the factory. Backed by a 1-year warranty and real automotive expertise.