Windshield Wiper Arm Installation Note

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Clean the serrated connecting part with a wire brush before installing the windshield wiper arm.

Fig 1: Cleaning Serrated Connecting Part Using Wire Brush
Courtesy of MAZDA MOTORS CORP.