200,000 is a lot of cars to recall – but it’s more for some manufacturers than it is for others. Toyota, for example, sold that many cars in the US last month alone. But for Mazda, that accounts for the majority of the 300,000 or so vehicles it sold here in all of last year.

The campaign in question affects two of the manufacturer’s best-selling models: the Mazda3 (its second most popular line after the CX-5) and the Mazda6 (its third most popular), covering several model years – from 2014-15 for the 6 and 2014-16 for the 3.

The problem comes down to the parking brake, which may be prone to corrosion. “Water could possibly enter the brake caliper causing the parking brake actuator shaft to corrode and possibly bind,” according to the National Highway Traffic Safety Administration, which could lead to the vehicle rolling away unexpectedly on a slope.

Though model years and calendar years don’t match up precisely, for perspective’s sake, the Japanese automaker sold roughly 450,000 of the models affected in the corresponding years. So the 227,814 represents roughly half of all those sold. The owners of those vehicles can expect to hear from the automaker’s North American office to arrange to have their parking brakes inspected (and replaced where necessary) starting August 21.

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