2013 Hyundai Sonata Owner's Manual - Page 336

Maintenance Parking brake Inspect the parking brake system including the parking brake pedal and cables. Steering gear box, linkage & boots/lower arm ball joint With the vehicle stopped and engine off, check for excessive free-play in the steering wheel. Check the linkage for bends or damage. Check the dust boots and ball joints for deterioration, cracks, or damage. Replace any damaged parts. Drive shafts and boots Check the drive shafts, boots and clamps for cracks, deterioration, or damage. Replace any damaged parts and, if necessary, repack the grease. Brake discs, pads, calipers and rotors Check the pads for excessive wear, discs for run out and wear, and calipers for fluid leakage. Air conditioning refrigerant Check the air conditioning lines and connections for leakage and damage. Exhaust pipe and muffler Visually inspect the exhaust pipes, muffler and hangers for cracks, deterioration, or damage. Start the engine and listen carefully for any exhaust gas leakage. Tighten connections or replace parts as necessary. Suspension mounting bolts Check the suspension connections for looseness or damage. Retighten to the specified torque. 7 21