Walker Products 350-64126 oxygen sensor for the 2015-2019 Toyota Highlander 4-cylinder 2.7L and other vehicles measures the oxygen content of the exhaust gas. Each part number is made for its own application and fitment position, and it returns the diagnostic feedback the ECU needs.
- Monitors the air-fuel ratio from the oxygen in the exhaust for combustion efficiency
- Wide-band sensor type
- Electrode coating guards against contamination and erosion from combustion residue and particulates
- Gas-permeable platinum layer on the electrodes
- Measures oxygen levels so the air-fuel mixture can be fine-tuned for fuel economy
Quick facts
- Part: Walker Products 350-64126 oxygen sensor
- Fits: 2015-2019 Toyota Highlander 4-cylinder 2.7L and other vehicles
- Position: Upstream, upstream left, upstream right, upstream rear
- Condition: New
A failing sensor can show up as poor running, higher fuel use or a lit malfunction indicator light. Before you replace the sensor, look its wiring harness and connector over for physical damage and have the stored fault codes read, so you know the sensor itself is the cause.
Fits
The vehicles it fits include the 2015-2019 Toyota Highlander 4-cylinder 2.7L, the 2016-2022 Lexus RX350 V6 3.5L and the 2018-2022 Lexus RX350L V6 3.5L. This listing is one sensor, and the vehicles named here take one. If your car is not named here, open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Position: Upstream, upstream left, upstream right, upstream rear
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: Wide-band
- Electrodes: gas-permeable platinum layer
- Condition: New
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this Toyota Highlander oxygen sensor made for the 2015-2019 model with the 4-cylinder 2.7L?
Yes. Walker Products 350-64126 is listed for the 2015-2019 Toyota Highlander 4-cylinder 2.7L, and the vehicle takes one sensor.
Is this a Lexus RX350 oxygen sensor for the 2016-2022 model with the V6 3.5L?
Yes. Walker Products 350-64126 is listed for the 2016-2022 Lexus RX350 V6 3.5L, and also for the 2018-2022 Lexus RX350L V6 3.5L.
Is this Walker Products oxygen sensor a wide-band type?
Yes. This upstream oxygen sensor is a wide-band type with an M18 - 1.5 thread.
What does the coating on this oxygen sensor's electrodes do?
The coating prevents contamination and erosion of the electrode surfaces from combustion residue and particulates in the exhaust gases. The electrodes are coated with a gas-permeable platinum layer.
Can a failed upstream oxygen sensor raise exhaust emissions?
Yes, higher exhaust emissions can go with a failed sensor. Newer vehicles can also store fault codes in the ECU that relate to it, and a shop can read them.
