The codes are cylinder misfires in all 4 cylinders.Are you having drivability issues, sputtering, low power, etc? If it drives okay, erase the codes and see what happens. If they come back, check the plugs, wires, coil pack. It could be an 02 issue,but that should have it's own code. I've found the best way to check these codes is "Google". Put the codes in the search in Parentheses (" "). You will find more than enough to tell you exactly what the code means and what to do about it.
1995 325I, window tint, K&N, debaffled airbox, BMW #104 wheels, Nighthawk low beams, smoked side markers, smoked corners, smoked taillights, M3 stlye heated mirrors, various interior bits, Bosal cat-back.