2009 Hyundai Sonata Owner's Manual - Page 236

DO-IT-YOURSELF MAINTENANCE 6 21 CHECKING BRAKE PEDAL CLEARANCE G160A01A-GAT G170A01A-AAT G180A01A-AAT CLUTCH PEDAL BRAKE PEDAL 0.24~0.51 in. (6~13 mm) 2.95 in. (75 mm) 0.12 ~ 0.31 in. (3 ~ 8 mm) G180A01L G160A01HR G160A01HR With the engine off, press lightly on the clutch pedal until you feel a change in resistance. This is the clutch pedal freeplay. The free-play should be within the limits specified in the illustration. If it is not, have it inspected by your Hyundai dealer and adjusted or repaired if necessary. With the engine off, press down on the brake pedal several times to reduce the vacuum in the brake booster. Then, using your hand, press down slowly on the brake pedal until you feel a change in resistance. This is the brake pedal freeplay. The free-play should be within the limits specified in the illustration above. If it is not, have it inspected by your Hyundai dealer and adjusted or repaired if necessary. You need a helper to check the brake pedal clearance. With the engine running, have your helper press down on the brake pedal several times and then hold it down with a force of about 110 lbs (50 kg, 490 N). The brake pedal clearance is the distance from the top surface of the brake pedal to the asphalt sheeting under the floor mat. If the brake pedal clearance is not within the limits specified in the illustration, have it inspected by your Hyundai dealer and adjusted or repaired if necessary.