Walker 250-241270 oxygen sensor for the 2017-2020 Toyota 86 H4 2.0L and other vehicles measures the oxygen in the exhaust gas to gauge combustion efficiency. Each Walker Products oxygen sensor is made for its specific application and fitment position.
- Measures oxygen content of the exhaust gas to monitor the air-fuel ratio
- Oxygen readings help the ECU fine-tune the air-fuel mixture, which supports fuel economy
- Electrodes made of a gas-permeable platinum layer
- Coating protects the electrode surfaces from combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker 250-241270 oxygen sensor
- Fits: 2017-2020 Toyota 86 H4 2.0L and other vehicles
- Position: Downstream
- Condition: New
A failing sensor can show up as the engine running poorly, higher fuel consumption or a lit malfunction indicator light. Before you replace the sensor, rule out damage to its wiring harness and connector, and have a shop read the stored fault codes. The fitment calls for one downstream sensor per car, and this listing is a single sensor.
Fits
The 2017-2020 Toyota 86 H4 2.0L, the 2013-2020 Subaru BRZ H4 2.0L and the 2014-2020 Subaru WRX STI H4 2.5L all take this sensor, and so do other vehicles. 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: downstream
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Sensor type: narrow-band
- Condition: new
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is the Walker 250-241270 sensor right for the 2013-2020 Subaru BRZ H4 2.0L?
Yes, Walker 250-241270 fits the 2013-2020 Subaru BRZ H4 2.0L as a downstream oxygen sensor, one per car. Open the "Vehicles it fits" section to check other models and engines.
Does the Walker O2 sensor fit the 2014-2020 Subaru WRX STI H4 2.5L?
Yes, Walker 250-241270 fits the 2014-2020 Subaru WRX STI H4 2.5L, and it is a downstream sensor.
What thread does this downstream sensor have, and is it narrow-band?
This sensor has an M18 - 1.5 thread and is a narrow-band type made for the downstream position.
Will a failing oxygen sensor set a fault code?
Yes, it can. Newer vehicles store fault codes in the ECU, and some relate to the affected sensor and its associated systems; a shop can read them.
How are the electrodes on this oxygen sensor protected?
The electrode surfaces carry a coating against contamination and erosion from combustion residue and particulates in the exhaust. The electrodes themselves are made of a gas-permeable platinum layer.
