EV-A4-D, also known as simply A4-D was an EV-series medical droid and mechanic owned by General Grievous to repair his body after battles with the Republic. He resided in his master's lair on the third moon of Vassek, operating as its caretaker. He was destroyed by Jedi Master Kit Fisto during a Republic operation to recapture Trade Federation Viceroy Nute Gunray.