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.
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"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.
If bolts are missing, the affected brake caliper will be replaced. Repairs will be performed free of charge.
The recall begins on August.
