"We have concluded that some Model S vehicles manufactured between May 10, 2013 and June 8, 2013 may contain a defect. Specifically, the attachment strength of the mounting bracket for the left hand latch of the second row seat could be weaker than intended. This reduces our confidence that the left hand seat back will be properly retained in the event of a crash," the company wrote in a blog post.
The post clarified that the weld is indeed attached to the cars, that there have been no customer complaints or reported injuries thus far and that the defect was not brought to Tesla's attention by a regulatory agency.
Musk added that affected Model S owners will be contacted in the next few days to coordinate a date for their vehicles to be picked up, fixed and returned to them hours later.