Review on 🔍 Enhanced SEO: Beck Arnley Disc Brake Pad Electronic Wear Sensor 084-1527 by Bryan Orozco

You may need 2 or 4 sensors. Some models have only one sensor on each axis, others two. Suggest you try to remove the old sensor before pulling the pads. If you can take it off with the pads installed then you're in luck as you can replace the pads and install the sensor at the end which is easier.