Luan ripped me off and scammed me.. I paid for spark plugs and coils and he only changed one coil and when my car broke down again he lied and said the coils were under warranty and thats when he changed a second coil.. I found out months later when my car started shaking again that he only changed two coils.. There was still an original Nissan coil in my engine.. I had paid him also to change a cam shaft sensor and they didn't do that either because I was watching my car the whole time.. Luan is a con artist so beware!