Electric car maker Tesla ( TSLA ) is voluntarily recalling 53,000 Model S and X vehicles after recently discovering "manufacturing issues" related to its electric parking brakes. The recall applies to vehicles built in 2016, between February and October. In an email sent to Tesla owners, the carmaker said parking brakes could be prevented from releasing but added, "We don't believe this issue could ever lead to a safety concern for our customers, and we have not seen a single accident or injury relating to it," as reported by Electrek. "In order to be overly cautious, we are going to be proactively replacing these parts to ensure that no issues arise," said Tesla, according to the report. Tesla stock fell 1% to 302.51 in the stock market today. The part in question is "a small gear" manufactured by a third-party supplier, Electrek said. Tesla believes the gear could have been "improperly manufactured" in less than 5% of the estimated 53,000 cars in question.