Dégripper un piston d’etrier remplacer le soufflet anti poussière

To purchase brake fluid, click here https://amzn.to/31KJJmQ Hello, I'm unseizing a screw-in piston in the right rear caliper of a 2006 Audi A3 Sportback 140hp. It's essential to change the brake fluid every two years, otherwise your caliper will seize up, and the cost can be steep. While unseizing the piston, the dust boot tore. I bought a repair kit from Ad for €21 with the AD card instead of €26.