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The oxygen sensor, which can be found either upstream or downstream of the catalytic converter, is intended to keep an eye on the air-fuel ratio while the engine is idling, accelerating gradually, and traveling at a steady speed. Poor gas economy, a rough idle, decreased drivability, and a lighted check-engine light are signs of a poor or defective oxygen sensor.
- Manufacturer Part Number: 234-9021, 234-4061
- Placement on Vehicle: Upstream, Downstream
- Manufacturer Warranty: 1 Year
Fitment：
Position: 2 Upstream & 1 Downstream 2004 Toyota Avalon XLS Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2004 Toyota Avalon XL Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2003 Toyota Avalon XLS Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2003 Toyota Avalon XL Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2002 Toyota Avalon XLS Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2002 Toyota Avalon XL Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2001 Toyota Avalon XLS Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2001 Toyota Avalon XL Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2000 Toyota Avalon XLS Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
Position: 2 Upstream & 1 Downstream 2000 Toyota Avalon XL Sedan 4-Door 3.0L 2995CC V6 GAS DOHC Naturally Aspirated
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