Reservists called up due to the war between Israel and Hamas said they found issues with the engines and treads of the tanks.
Images showed Israeli vehicles with modified coverings whose purpose is to protect soldiers inside from any explosives dropped from drones.
Zelensky said on Monday that Ukraine had taken delivery of its first shipment of US jet-powered Abrams tanks to help in the defense against Russia's invasion.
Elbit Systems specializes in developing new technologies for the defense industry, including surveillance systems, drones, and munitions.