colinandkaren

hi all i have just bought my wife a lexus is200 on a V plate very nice car but it had a problem with the head unit (error 3) quite common i read.. so i purchased another head unit it was manufactured 6 months after the orininal and is labeled as "lexus 13902" the replacement is labelled "lexus 13901" it has 3 plug socket on the back compared with 2 on the old one although the car only has one plug. is it possible to fit the new one in the car?