Common abbreviations used in Nissan 240sx Service Manuals.
OEM = Original Equipment Manufacturer (stock replacement parts)MAS = Mass Airflow SensorMAF = Mass Air Flow sensorFSM = Factory Service Manual ECU = Engine Control UnitLSD = Limited Slip DifferentialVLSD = Viscous Limited-Slip DifferentialSOHC = Single OverHead Cam (1989, 1990 models)DOHC = Dual OverHead Cam (1991-1998 models)S13 = 1989-1994 240SXS14 = 1995-1998 240SX
