2002 Toy Rav4, front left brake keeps grabbing. Year ago, said it was crimped brake line. Last week, got new caliper. Brake still seizing?

PS-----Feels like there's slight pressure on brakes, car doesn't roll well. Sometimes brakes grab heavily, but can release. I called radio auto show, guy said it was old brake fluid. I thot maybe bad master cylinder, but he said it wouldn't act that way.

But why would it always be front left brake that seizes up?

I'm getting 8-12 mpg with brakes slightly grabbing like this.

But yet brake warning light doesn't come on.

Hi so no car lasts for ever and when a car gets over 8 years old things do start to go wrong frequently.