Brake Master Cylinder problems of the 2005 Hyundai Elantra

I have a similar problem to one I have seen several posts on here. I have a 2005 Hyundai Elantra GLS with abs brakes and have had a chronic problem with the brakes since April 2009 at 78,867 miles. The brake pedal becomes softer and softer and eventually goes to the floor with little or no braking capability. I have had the system bled several times, three master cylinders and all four calipers changed by my local mechanic,. The brakes are ok for a while but the problem returns. I took it to Hyundai last week 6/20/11 at 83,400 miles and they said there were no problems with the hydraulic system, no leaks, but alot of air in the system. They recommended new rotors and pads on all four wheels (said the old rotors were rotted and ridged, and the pads were grooved) flush out of the brake fluid and cleaning of the caliper brackets and slider pins which were impeding pad movement. They suggested that these conditions were causing the system to draw air. I had the repairs done but the pedal still feels a bit "soft" but the car is responding to braking. I am not confident that the problem is resolved but time will tell for sure.

I purchased my 2005 hyndai Elantra gt, new in October 2005. At 12,000miles the brake pedal went to the floor while braking. The brake master cylinder was replaced. Two weeks following this repair again the brake pedal went to the floor. The abs module was replaced. In December 2009, at 68,000 miles again the brake pedal went to the floor while braking. The brake master cylinder was again replaced (at owner's expense since the car was then out of warranty). Now in March 2011 once again the brake pedal went to the floor while braking. The car is currently in the shop and is getting the fourth brake master cylinder and the third abs module on a car that only has 89,000 miles. Each time the brake system failed it was sudden and without any warning any of these incidents could have caused a major accident. My concern is that hyndai has a malfunctioning brake system in their 2005 hyndai Elantra gt that is a major safety concern.

I purchased my Hyundai Elantra 4 door sedan, VIN kmhdn46dx5u113597, on August 31, 2005. When I took the vehicle in to the dealership for the first oil change at 3500 miles there was a brake fluid leak detected in the rear wheel cylinders. They were both replaced at that time under warranty. On February 4, 2006, I took my vehicle in for the 15000 mile check and once again there was a brake fluid leak discovered and both rear wheel cylinders were once again both replaced under warranty. If these items are defective, Hyundai should issue a recall rather than simply putting out a technical service bulletin. There are apparently two (2) such bulletins in existence: 1. 04-50-010 Nov 04 brakes - rear drum brake wheel cylinder leak inspection, and 2. . Read more...