One problem related to brake master cylinder has been reported for the 2008 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Hyundai Elantra based on all problems reported for the 2008 Elantra.
After sitting for 43 hours in our driveway the 2008 Hyundai Elantra caught fire starting on the driver's side of the engine compartment and continued across and through the vehicle. It should be noted the vehicle had a smoking issue in the compartment a month previous and was taken to the Hyundai shop and a repair estimate provided that included the master cylinder and the antilock brake system. At that time when the smoke incident happened the antilock system engaged and the brake pedal went to the floor. I observed where the smoke was coming from and pointed at the abs block to the service manager. Vehicle went back into use and I ordered parts. Installed master cylinder but abs parts did not arrive before vehicle immolated itself. In the 43 hour non use gap, the vehicle did not have the remote entry fob used nor any key entry. Fire department put the cause as being an electrical fire.