So last week my right caliper started sticking. It has done it before maybe 5 months ago but just briefly. Anyhow, I decided to
Put a new one in and problem solved. Now a week later the left one is sticking. What are the odds of both failing around the same time? Is it even a caliper issue or maybe a master issue? Also I notice it is more likely to happen when I drive more than half an hour. In short drives it seems like it doesn't happen

 

Bump. need help. gotta fix this for tomorrow

 

What do the pad slides look like on the knuckle?

 

My first thought/question aswell

 

Not too familiar with what you mean. can you explain. the right caliper was replaced last week. the left caliper is maybe 3 years old

 

The pad slides on the knuckle, the portion where the brake pads rest on.

These can become grooved and cause sticking issues.

Like this:

 

Is/was the brake fluid clean & clear? Are the flex lines swollen?

 

Gotcha. the pad slides look fine and the fluid looks clear. I inspected the lines and they look fine and not collapsed or ballooned. I blew the brakes quite a bit so most of the fluid is fresh. how likely is it that both calipers can start to stick in a matter of a week. I'll replace the caliper tomorrow but I'd hate to throw parts at it and find out its something else

 

If the fluid was not changed regularly it absorbs moisture and can rot the seals so they can no longer retract the piston.

 

Right like I said most of the fluid had been replaced because I bled the brakes quite a bit and I don't dump it back in. I only add fresh fluid. am I being paranoid that it can be something like the booster or proportioning valve? or just a weird coincidence that they both failed within a week of each other