Tesla has issued a voluntary recall for approximately 53,000 Model S and Model X cars, which may be susceptible to having stuck parking brakes. The company hasn't received any reports of the parking brake system failing, but decided to issue a recall for precautionary reasons. According to CNET, the recall affects 31,000 Model S and Model X cars in the U.S., "and all affected vehicles carry build dates between February and October 2016." From the report: The problem lies with the electric parking brakes that help secure the vehicles when placed in Park. The parking brakes contain a small gear that might fracture, which would prevent the parking brake from releasing. Thus, a car that enters Park may not be able to move again. This has no bearing on the vehicles' regular brakes, and Tesla has received no reports of the parking brake system failing to hold a car in place. Tesla estimates that about 2 percent of the vehicles recalled contain the improperly manufactured gear. It should be noted that the parking brake assembly is from a third-party supplier, as well.