The PowerStop 16-2042 is a rear Z16 Evolution ceramic pad set for the 2017-2018 Mazda 3, sold as the brand's daily-driver stock replacement. The manufacturer describes a low-dust ceramic formula designed to maximize stopping power while reducing dust and noise, with the low-dust claim validated through on-vehicle third-party tests in the USA. Dual rubber-backed shims are meant to cut noise, and the thermally scorched friction surface is intended to speed break-in. Compared with a cheap bulk pad, this set is built to keep rear wheels cleaner and braking quieter on a commuter Mazda, which is the main reason to pay for the Evolution line.
Fitment on this generation depends on your build and parking brake setup, so confirm your VIN before ordering. Many owners on user forums report that the electric parking brake must be put into service mode before the rear pistons can be wound back, and that the caliper bracket contact points should be lubricated with brake lube to prevent noise. Owners also note that the wide-dot pad goes inboard and the narrow-dot pad goes outboard. Typical tools include a 14mm socket, a 7mm hex key, a 45 Torx bit, a piston tool or needle-nose pliers, and brake cleaner. Searches for Mazda 3 rear EPB pad replacement, Z16 rear ceramic pads, and low-dust rear brake upgrade will lead you to this exact application.
Fitment details vary by build and parking brake type, so confirm compatibility with the manufacturer using your VIN before ordering. Owners on user forums say the electric parking brake must be placed in service mode before the rear pistons are retracted.
The manufacturer says the friction surface is thermally scorched to support a faster break-in. Even so, follow a normal bedding-in procedure with a few moderate stops before relying on full braking performance.
The manufacturer states that the low-dust formula was validated through on-vehicle third-party tests in the USA. Dust levels will still depend on driving habits and wheel type.
This is a moderate DIY job for someone comfortable with a jack, jack stands, and basic brake work. Owners on user forums recommend putting the electric parking brake into service mode before pushing the pistons back, and warn that the piston must be wound back slowly to avoid damaging the caliper. Lubricate the bracket contact points, check that brake lines are not kinked or caught, and confirm that the caliper guide pins and bracket bolts are torqued correctly. Owner guides list caliper pin torque around 19-22 ft-lbs and caliper bracket torque around 44-56 ft-lbs, but verify these in a service manual. Finish by pumping the parking brake and performing a few stops to bed in the pads.
