Mazda North America is recalling just over 24,000 2020 models to check for loose bolts in the brake system.
Models affected are the recently launched CX-30 and 3 vehicles.
"Front brake caliper mounting bolts may not have been tightened properly during assembly, possibly allowing the calipers to loosen," the NHTSA notice said.
It added: "Loose brake calipers can reduce braking performance or interfere with wheel rotation, affecting vehicle handling.
"Either of these scenarios can increase the risk of a crash."
The automaker will notify owners, and dealers will inspect the front brake caliper bolts, tightening them as necessary.
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By GlobalDataIf bolts are missing, the affected brake caliper will be replaced. Repairs will be performed free of charge.
The recall begins on August.