FordPartsGiant.com offers the wholesale prices for genuine 2007 Mercury Monterey parts. Parts like Rear Seat Belts are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.9L OHV EFI NA, 6 Cyl 4.2L OHV EFI. Transmission: 4AT AX4N.