Power brakes are not functional on startup when cold -- brake pedal is very stiff and takes a lot of pedal pressure to stop the car from moving while exiting driveway. Generally, braking improves within a minute or two of driving, but sudden stops in this condition are difficult and unsafe. The dealer service department diagnosed a leaking check valve in the vacuum system and the brake booster needs to be replaced - safety-related components such as brake boosters should not be failing at such an age.

- Rochester, MI, USA