My 308 has a low brake pedal. The car stops, but I honestly don't know if the brakes are "weak" or not. It's a '77 Euro 'glass, dry sump, no ac, no emmission controls car. Any suggestions? Thanks!
If the brake pads are ok and the fluid level is ok, try bleeding them. Low pedal is common with air in the brake lines.
I think you have either low pads, rear pads are adjusted too far from rotors or rotors are worn way down past spec.