Toyota has announced it is adding 1.2 million vehicles to a U.S. recall over possible fuel pump failures, ABC News reports. This brings the total number of vehicles embroiled in the recall up to 1.8 million in the U.S. and making for a total of 3.2 million vehicles worldwide.

The initial recall announced in January included no less than 696,000 vehicles in the United States from the Toyota and Lexus brands.

The Japanese car manufacturer initially said select Toyota and Lexus models have a fuel pump that could stop working. Toyota hasn’t explained why the fuel pump could suddenly malfunction but has confirmed that if it does, the engine may run rough, could stall, and may be unable to be restarted. If the vehicle were to stall at higher speeds, it could trigger a crash.

Toyota says owners of vehicles not involved in the January recall will be notified in early May about when they can make a service appointment. Dealers will replace the defective fuel pump with a new one.

Read Also: Almost 700,000 Toyota And Lexus Models Recalled Over Fuel Pump Issue

Vehicles involved in the January recall were limited to the 2019-2019 models and included the Lexus LS 500, LC 500, RC 350, RC 300, GS 350, IS 300, ES 350, LX 570, GX 460, RX 350 and certain 2019 model year Lexus NX 300, RX 350L, and GS 300 models. At Toyota, 2018-2019 model year vehicles initially involved were the 4Runner, Camry, Highlander, Land Cruiser, Sequoia, Sienna, Tacoma, and Tundra as well as 2019 model year Avalon and Corolla models.

New model added include the 2018-2019 Lexus IS 350, LC 500h, LS 500 h as well as 2013-2015 Lexus LS 460, 2013-2014 Lexus GS 350, 2014 Lexus IS-F and Toyota FJ Cruiser, 2014-2015 Lexus GX 460, IS 350, LX 570, Toyota Land Cruiser, and Toyota 4Runner. Others include the 2015 Lexus NX 200t and RC 350, 2017 Lexus IS 200t and RC 200t, 2017-2019 Toyota Sienna and Lexus RX 350, and the 2018 Lexus GS 300.