Tesla has issued a recall of 817,143 vehicles over a defect that causes seatbelt chimes to go silent under particular circumstances. “The audible chime may not activate when the vehicle starts and the driver has not buckled their seat belt,” the National Highway Traffic Safety Administration (NHTSA) said in their recall report (pdf). The recall will remotely update the vehicle software this month to ensure that the chimes reliably commence as intended, sparing users the inconvenience of having to take their vehicles in for service. This defect only occurs in a select few circumstances. It appears to happen when the driver has previously interrupted the chimes. Even in these conditions, the chimes will initiate again once the car is moving faster than 22 kilometers per hour (about 13.7 miles per hour). Federal law requires all cars to initiate an audible chime when the car is started, which terminates when the seatbelt …