About Brake Caliper : The brake caliper fits like a clamp on a wheel’s rotor to stop the wheel from turning when you step on the brakes. Inside each caliper is a pair of metal plates known as brake pads. When you push the brake pedal, brake fluid creates pressure on pistons in the brake caliper, forcing the pads against the brake rotor and slowing your car. Application: For Hyundai i40 Petrol 1.6 2.0 Diesel 1.7 CRDi 2011- For Kia Optima Petrol 2.0 Diesel 1.7 CRDi Petrol Electric 2.0 2012- *Please check the detail model of your car accorrding to the compatibility table before purchasing. OE/Part number: Left: 58210-3Z100, 58210-3Z700, 58310-3ZA00, 58310-3ZA70, 58210-3Z160, 58210-3Z760, 58310-3ZA16, 58310-3ZA76, 582103Z100, 582103Z700, 583103ZA00, 583103ZA70, 582103Z160, 582103Z760, 583103ZA16, 583103ZA76 Right: 58230-3Z100, 58230-3Z700, 58311-3ZA00, 58311-3ZA70, 58230-3Z160, 58230-3Z760, 58311-3ZA16, 58311-3ZA76, 582303Z100, 582303Z700, 583113ZA00, 583113ZA70, 582303Z160, 582303Z760,