engine shuts off after a few seconds
i am buying a used 2000 328ci from a dealership. it has 139000 miles on it .it has an s tittle and needs a wind shield, hood, L. headlight, and L. fender. The salesman said it will start but shuts off after like 2 seconds. He thinks its the encoding of the key or the security system while another salesmen thinks its the fuel pump... he wants 3500-3700 for it
Any ideas why it wont run?