Sonata GL V6-2.5L (1999)
1. Check for worn, damaged, or rusted piston bore and piston. Replace the damaged parts if necessary.
2. Check for damaged piston seal, boot, and pin insulators.
3. Apply a recommended lubricant to the following parts.
4. Push the piston into the caliper.
5. Align the piston mating mark to upward as shown in illustration.