The 2003 Chevrolet Malibu OBD 2 port is on lower edge of dash left of steering column
It is 0BD2 system
The 2003 Chevrolet Malibu OBD 2 port is on lower edge of dash left of steering column
The 2003 Volkswagon Jetta OBD 2 port is "in cavity at bottom of dash, between steering column & kick panel"
The 2003 Honda Accord OBD 2 port is under driver side dash above dead pedal
it is located behind ashtray end of consol
The 2005 Chevrolet Aveo OBD 2 port is under driver side dash next to kick panel
Should be OBD I, OBD II is 1996 and newer
The standard location is by your knees under the dash of the drivers side. Since it's 2003, it's OBD2. You can get any scanner that says it will read OBD2 codes.
http://www.fixexpert.com/wiki/OBD-2+Location
OBD1
The 2003 Honda Civic OBD 2 port is behind center console