You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=search' at line 1
SELECT `vehicleName` as title_cah, `vehicleDescription` as shortdesc_cah, `vehicleID` as url_cah, 5 as importance_cah, `vehicleReg`, `vehicleName`, `vehicleDescription` FROM tbl_Vehicles WHERE mod=search