Tesla is recalling 2.2 million vehicles, or nearly all of its electric vehicles in the United States, due to incorrect font sizes on warning lights, which increases the risk of a crash, the National Highway Traffic Safety Administration (NHTSA) said on Friday.

This is more than the 2.03 million vehicles Tesla recalled in the United States two months back, its biggest-ever such move at the time, to install new safeguards in its Autopilot advanced driver-assistance system.

Tesla has been under the NHTSA’s scanner for its autonomous driving aid that is intended to enable cars to steer, accelerate and brake automatically within their lane.

The latest recall includes vehicles across Tesla’s various models, including the Model S, Model X, 2017-2023 Model 3, Model Y, and 2024 Cybertruck vehicles, the NHTSA said.

“Warning lights with a smaller font size can make critical safety information on the instrument panel difficult to read, increasing the risk of a crash,” the NHTSA said.

Tesla began releasing an over-the-air software update on Jan. 23, free of charge, to fix the issue, the regulator said.

The software update will increase the font size of the visual warning indicators for the brake, park and antilock brake system (ABS).

The Federal Motor Vehicle Safety Standard No. 135, opens new tab requires warning indicators for vehicles equipped with hydraulic brakes to be at least 3.2 millimeters, or an eight of an inch, high.