Fitment For 1999-2004 Oldsmobile Alero For 1999-2005 Pontiac Grand Am When to Replace Brake Calipers? Over time in normal driving conditions, the heat generated from the braking system can weaken and break down seals inside the calipers. They can become rusty, contaminated or dirty, and start to leak brake fluid if you don’t drive regularly. However, you should have your brakes checked immediately if you experience any of the following: .
