Tesla is recalling more than 817,000 electric vehicles (EVs) in the United States because the seat-belt reminder chimes may not sound when the vehicles are started and the driver hasn’t buckled up.
The recall covers the 2021 and 2022 Model S sedan and Model X SUV, as well as the 2017 through 2022 Model 3 sedan and 2020 through 2022 Model Y SUV, according to documents posted Thursday by safety regulators.
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Federal motor vehicle safety laws require the chimes to sound when vehicles are started, and the sound stops when front belts are buckled.
The recall documents posted by the National Highway Traffic Safety Administration (NHTSA) say the problem happens only if the driver left the vehicle in the previous drive cycle while the chime was sounding.
Tesla will fix the problem by sending out an over-the-air software update early this month. The safety agency says that without the chime, a driver may not know a seat belt is unbuckled, increasing the risk of injury during a crash.
The company says in the documents that it’s not aware of any crashes or injuries due to the problem. A visual seat belt reminder is still displayed.
The problem was discovered by South Korea’s Automobile Testing and Research Institute on January 6. Tesla investigated and determined that a recall was needed on January 25, the documents say.
The chime still sounds if the vehicles go over 22km/h (13.7mph) and the driver’s belt isn’t buckled.
The US recall is the largest in the Austin, Texas-based company’s history and comes as the company faces increasing scrutiny from NHTSA, the nation’s road safety agency.
The agency this week said that Tesla would recall nearly 54,000 cars and SUVs because their “Full Self-Driving” software lets them roll through stop signs without coming to a complete halt.
Recall documents posted Tuesday say that Tesla will disable the feature with a software update. The “rolling stop” feature allows vehicles to go through intersections with all-way stop signs at up to 9km/h (5.6mph) per hour. The feature would work as long as the owner chose to activate it and the car didn’t detect any “relevant” moving cars, pedestrians or bicyclists.
Tesla’s “Full Self-Driving” software is being tested by selected owners on public roads. It cannot drive itself, and the company warns that drivers must be ready to intervene at any time.
NHTSA also is looking into a driver’s complaint that “Full Self-Driving” software caused a crash in California.
It’s also investigating why Teslas using the company’s less sophisticated “Autopilot” driver-assist system have repeatedly crashed into emergency vehicles parked on roadways.
The newest recall covers all four models in its lineup. Estimates by Motorintelligence.com show Tesla has sold just over one million vehicles in the US since 2013.