Walker Products 245-1621 mass air flow sensor for the 2019-2024 Mazda 3 4-cylinder 2.5L, the 2021-2023 3 4-cylinder 2.0L and other vehicles measures the air entering the engine. That data helps the ECU optimize the air-fuel mix, which supports fuel efficiency and performance.
- Programmed and tested for fit, form and function before it is sold
- Custom engineered circuit boards and programming, with flow characteristics tuned across the full flow spectrum
- Calibrations go through 100% production testing and are verified on a vehicle
- Plastic housing included with the sensor
Quick facts
- Part: Walker Products 245-1621 mass air flow sensor
- Fits: the 2019-2024 Mazda 3 4-cylinder 2.5L, the 2021-2023 3 4-cylinder 2.0L and other vehicles
- Material: Plastic housing
- Condition: New
Rough idle, hesitation or a check engine light can mean the sensor is not reading incoming air correctly. A leak in the intake tract is another common source, so these signs alone don't prove the sensor is at fault. If the sensor is the cause, this one replaces it.
Fits
The 2018-2024 Mazda CX-5 4-cylinder 2.5L and the 2020-2025 Mazda MX-5 Miata 4-cylinder 2.0L fit this mass air flow sensor, along with many other vehicles. This listing is one sensor, and the 2018-2024 Mazda CX-5 4-cylinder 2.5L takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Mounting type: Flange
- Mounting hole quantity: 1
- Connector: 1, female, oblong
- Terminals: 5 pins
- Wires: 5
Build and materials
- Housing: Plastic, included
- Mounting hardware: Included
- Grade: Standard replacement
- Condition: New
- Country of origin: Japan
In the box
One mass air flow sensor with its housing and mounting hardware.
Installation notes
- Replacement Torx screws and the corresponding tools are supplied.
- Oils on your hands or even air pollution can damage the sensor, so handle it with care.
Interchange: PYFS13215
Frequently Asked Questions
Is this a mass air flow sensor for the 2019-2024 Mazda 3 4-cylinder 2.5L and the 2021-2023 3 4-cylinder 2.0L?
Yes. Walker Products 245-1621 fits the 2019-2024 Mazda 3 4-cylinder 2.5L and the 2021-2023 3 4-cylinder 2.0L.
Is this MAF sensor right for the 2018-2024 Mazda CX-5 4-cylinder 2.5L?
Yes. Walker Products 245-1621 fits the 2018-2024 Mazda CX-5 4-cylinder 2.5L. If your Mazda is a different model or year, look it up in the "Vehicles it fits" section on this page.
Does this Walker Products mass air flow sensor come with its housing and screws?
Yes. Walker Products 245-1621 includes the plastic housing and mounting hardware, and it is supplied with replacement Torx screws and the corresponding tools.
What kind of connector does this mass air flow sensor have?
This sensor has one oblong female connector with 5 pin terminals and 5 wires. It mounts by a flange with one mounting hole.
Is PYFS13215 the same as this mass air flow sensor?
Yes. PYFS13215 is an interchange number listed for this sensor, so Walker Products 245-1621 replaces it.
