Kia Troubleshooting Questions? Ask a Mechanic
Hi. Have any brake components actually been replaced to try and fix this? Or just the fluid flushed?
I have been working on KIAs for many years and have never seen this problem. Usually if all the brakes are locking, it can sometimes be if the wrong brake fluid, or a different type of fluid was added to the brake system before this started happening. What happens is the seals in the calipers and master cylinder can swell up and actually cause the brakes to remain applied. If it is not releasing pressure though, I would also suspect the master cylinder as a failed part. It applies pressure to the hydraulic system, and also releases the pressure. So I think that is a good possibility as well.