Walker Products 350-34693 oxygen sensor for the 2014-2018 Mazda 3 4-cylinder 2.0L or 2.5L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine burns fuel. This downstream Walker Products oxygen sensor is a narrow-band, 4-wire unit that passes the diagnostic feedback the ECU needs.
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases
- Electrodes coated with a gas-permeable platinum layer
- Reads oxygen levels to help fine-tune the air-fuel mixture and fuel economy
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 350-34693 oxygen sensor
- Fits: 2014-2018 Mazda 3 4-cylinder 2.0L or 2.5L and other vehicles
- Position: Downstream
- Condition: New
A failing sensor can show up as an engine that runs poorly, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Those signs can start elsewhere too, so before you replace the sensor, look it over with the engine off and cool, along with its wiring harness and connector, for physical damage.
Fits
It is listed for a wide range of Mazda models and suits Mazda 3 oxygen sensor replacement on the 2014-2018 model with the 4-cylinder 2.0L or 2.5L. It also fits the 2014-2021 Mazda 6 4-cylinder 2.5L and the 2019-2025 Mazda CX-5 4-cylinder 2.5L. This listing is one sensor, and each of these takes one. If your Mazda is not named here, look it up in the "Vehicles it fits" section before you order.
Specifications
Fit and size
- Position: Downstream
- Quantity per vehicle: 1
Build and materials
- Type: Narrow-band
- Wires: 4
- Electrodes: gas-permeable platinum layer
- Condition: New
Interchange: CTK-OSMA4001
Frequently Asked Questions
Is this the right Mazda 6 oxygen sensor for a 2014-2021 model with the 4-cylinder 2.5L?
Yes. Walker Products 350-34693 is listed for the 2014-2021 Mazda 6 4-cylinder 2.5L, and the "Vehicles it fits" section shows whether your other Mazda is covered.
Does this Mazda CX-5 oxygen sensor fit the 2019-2025 model with the 4-cylinder 2.5L?
Yes. It is listed for the 2019-2025 Mazda CX-5 4-cylinder 2.5L, and that vehicle takes one sensor.
Is the Walker Products 350-34693 a narrow-band or wideband sensor?
Walker Products 350-34693 is a narrow-band, 4-wire oxygen sensor. Its electrodes are coated with a gas-permeable platinum layer.
Is this an upstream or downstream oxygen sensor?
This oxygen sensor is a downstream unit. The listing is one sensor, and the vehicles it fits take one.
What does the coating on this oxygen sensor's electrodes do?
The coating keeps combustion residue and particulates in the exhaust gases from contaminating or eroding the electrode surfaces.
