To learn The Cars - Just What I Needed chords, your first step should be understanding these chords - B, C#, E, B, A, G#, E, A and E in sequence. Ease into the song by practicing at 63 BPM before reaching the track's full tempo of 128 BPM. Align the capo with your vocal depth and chord choice, bearing in mind the song's original key: E Major.