Walker Products 350-34587 rear oxygen sensor for the 2004-2006 Toyota Sienna V6 3.3L and the 2007-2010 Sienna V6 3.5L reports exhaust oxygen levels to the ECU. This Walker Products oxygen sensor is a narrow-band, 4-wire direct-fit design made for this application and sensor position.
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gas
- Determines the oxygen content of the exhaust gas to monitor the air-fuel ratio for combustion efficiency
- Oxygen readings help fine-tune the air-fuel mixture to support fuel economy
- Monitors exhaust gases to help reduce pollutants
- Electrodes made of a gas-permeable platinum layer
Quick facts
- Part: Walker Products 350-34587 oxygen sensor
- Fits: the 2004-2006 Toyota Sienna V6 3.3L and the 2007-2010 Sienna V6 3.5L
- Position: Downstream rear
- Condition: New
A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. The wiring harness and connector can be behind these symptoms as well, so inspect them for physical damage and find the cause before buying a sensor.
Fits
This oxygen sensor fits the 2004-2006 Toyota Sienna V6 3.3L, the 2007-2010 Sienna V6 3.5L and the 2015-2016 Sienna V6 3.5L. This listing is one sensor, and the 2007-2010 Sienna V6 3.5L takes one.
Specifications
Fit and size
- Position: Downstream rear
- Quantity per vehicle: 1
Build and materials
- Type: Narrow-band, 4-wire, direct fit
- Electrodes: gas-permeable platinum layer
- Condition: New
Interchange: CTK-OSTO4008
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Does the Walker Products 350-34587 fit the 2004-2006 Toyota Sienna V6 3.3L?
Yes. Walker Products 350-34587 is a downstream rear oxygen sensor for the 2004-2006 Toyota Sienna V6 3.3L, the 2007-2010 Sienna V6 3.5L and the 2015-2016 Sienna V6 3.5L.
Is this oxygen sensor narrow-band or wideband?
Walker Products 350-34587 is a narrow-band sensor with 4 wires, made for the downstream rear position.
Can a bad downstream oxygen sensor turn on the check engine light?
Yes, it can. A failed sensor can also cause poor running, higher fuel consumption or more emissions, and newer vehicles store fault codes in the ECU, some tied to the sensor.
What does the coating on this oxygen sensor do?
The coating shields the electrode surfaces from contamination and erosion caused by combustion residue and particulates in the exhaust. The electrodes themselves use a gas-permeable platinum layer.
Does CTK-OSTO4008 cross-reference to this Walker Products 350-34587 sensor?
Yes, CTK-OSTO4008 is listed as an interchange number for this oxygen sensor.
