Rear ABS Wheel Speed Sensor Removal/Installation
1. Remove the under cover..
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.

Connector
Bolt
Rear ABS wheel-speed sensor
ABS hole cover
.
Connector
Rear ABS wheel-speed sensor wiring harness
(See Rear ABS Wheel-speed Sensor Wiring Harness Installation Note.)
ABS Hole Cover Removal Note
1. Press the tab of the ABS hole cover to separate the ABS hole cover from the body.

2. Remove the ABS hole cover from the body.
Rear ABS Wheel-speed Sensor Wiring Harness Installation Note1. Pass the rear ABS wheel-speed sensor wiring harness outside the rear parking brake cable as shown in the figure.

2. Install the rear ABS wheel-speed sensor wiring harness.
ABS Hole Cover Installation Note1. Install the ABS hole cover into the body so that the arrow on it is facing toward the outer side of the vehicle.

Test yourself
A quick Mazda 3 quiz: every answer comes with an explanation and a link to the manual page.