Brakes sticking 2002 Hyundai Elantra gt

Hyundai Elantra

What is the most likely reason my driver side front brake sticks after they warm from regular use?

Brakes can be tricking at times. A sticking caliper assembly and or the caliper hose. What happens often is that the fluid is unable to flow back due to a restriction either in the hose or internally in the caliper. Replacing both would be my recommendation. This is also common to occur after changing the brake pads.