The recall is the fourth to be made public in the last two weeks as US watchdog the National Highway Traffic Safety Administration (NHTSA) increases its scrutiny of the nation’s largest electric vehicle maker. In two of the recalls, Tesla made decisions that break safety laws, while the others were down to software errors.

The NHTSA said on its website on Thursday that the cars and SUVs have what Tesla calls a 'Boombox' function that allows drivers to play sounds while the vehicles are moving. This breaches federal safety standards that require pedestrian warning noises for electric cars, which make little noise when moving, the agency says.

The agency says the problem will be repaired with an over-the-air software update that will disable the 'Boombox' function. It says the function can be used while the Teslas are in drive, neutral or reverse modes.

The recall covers certain 2020 to 2022 Tesla Model X, S, and Y vehicles, as well as 2017...