Brake Master Cylinder problems of the 2009 Hyundai Genesis

Tl-the contact owns a 2009 Hyundai Genesis the contact stated that while driving at various speeds he brake pedal was applied but failed and depressed to the floor and rolled. There were no warning lights illuminated the vehicle was taken to an independent mechanic who stated the brakes needed to be bleed and master cylinder replaced. The local dealer was not contacted. The manufacturer was contacted but did not assist. The failure millage was 62,000. Ap.

Brakes are a continuing problem or better said bad brakes, like sometimes going to the floorboard. The esc dash light is on and the cruise control doesn't work either. I had completed a recall on the brake fluid,but shortly after that my my petal went to the floor. Being concerned, I replaced the master cylinder, brake rotors, brake lines and pads. Upon bleeding the system, the dealers new brake fluid came out with sludge floating on top of clear fluid. I contacted the dealers general mgr. And complained of a bad drain repair. He asked me to bring my car in and they'll check it again. I showed him the pictures and they denied that it came from my car, but they would fix my car's brakes for $2700. 00 with no guarantee that it wouldn't cost more. This was tom ah dealer ship in lima, ohio. I feel that Hyundai should be held responsible for these brake problems. I have the fluid saved and pictures also. Upon checking the internet, I have been advised that the esc and cruise control is wired to the abs system. I was on interstate 75 and the car just started applying the brakes by themselves. A ratcheting on off effect. I slowed the car down and pulled the car over to the side. I was within sight of my turnoff state rte 274 OH, so I continued on. I went to stop and my petal went to the floor. I was going slow, made my turn and stopped. I got under the hood just to see if something visual was there. I was within 7 miles of my home a straight line, so I went for it. I pressed on the gas and my left front wheel was locked up. I backed up and went forward again, shutting off the car & restarting it. Brake was released, but petal still went to the floor. I drove home 20 mph, had car towed to dealer for repair. Don't know what they did, but charged $677. 00. A couple days later, my petal went to the floor again. Thats when I did the repairs noted above. Still have problems.

My Genesis has less than 26,000 miles on it. Three days ago the brakes failed. The garage stated that it was master cylinder for the brakes. Today they called and stated that the hydraulic control unit also needs to be changed out. My wife was traveling at approximately 45 miles per hour when she attempted to slow the car down for an intersection. She was on lewis Ave. In temperance mi. The brake pedal went to the floor board. It did eventually slow the car enough and she was able to exit into a parking lot. At this point we had the car towed to a garage.

Brake pedal depresses all the way to the floor. Replaced brake master cylinder and flushed brake fluid. Brake pedal still depresses to the floor. Car has 46,000 miles on it. Abs censor is faulty. Need new module.

The contact owns a 2009 Hyundai Genesis. While driving and attempting to stop the vehicle, the brake pedal traveled to the floorboard. The brakes had to be pumped in order to stop the vehicle. The vehicle was taken to the dealer for diagnostic testing and it was determined that the brakes were fine. The contact stated that the brake failure recurred the very next day. The vehicle was taken to an independent mechanic where it was diagnosed that the master cylinder failed and the abs hydraulic unit needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 39,305.

The brake pedal, when applied, traveled well beyond the normal point of stopping, almost to the floor. Braking effectiveness and results were greatly diminished and the pedal was extremely "spongy"/not firm as normal. In an emergency stopping situation, the car simply could not have stopped in time to avoid collision. This was not an intermittent occurrence. Once the symptom manifested itself, it has done do consistently. The car has been delivered to the humble TX Hyundai dealership which has identified the hecu component as the problem, and not the master cylinder. Unfortunately the service writer has not recognized the recall action required for this component.

Brake pedal went to floor. Very difficult to stop vehicle. This is an intermittent problem and does not happen all the time. Typically has occurred once or twice per month. This continues even after having the master cylinder replaced and filling a complaint with the NHTSA. Hyundai checked the hecu module under their recall campaign #114 and states the hecu is within specs. However, since this is an intermittent issue they cannot diagnosis the problem until it fails. Cannot drive vehicle as we cannot predict next time this failure will occur.

Brought my car in to address a recall on the brakes. 10 days after they flushed my brake fluid I noticed I had to push down hard on the brake pedal for the car to stop. I brought the car in and they said the master cylinder needs to be replaced at my cost. I have two young children and I'm extremely concerned about the safety of this vehicle.

In October while the car was at the dealer for service they asked me wait a few more minutes and explained they were replacing the brake fluid. Within a month of that service I started noticing a soft peddle which turned to a to the floor pedal on occasions. Finally in late Dec 13 it got very bad and the brakes were unresponsive and took a great deal of pressure to activate from time to time. I brought the car to the dealer today under a new recall I just received regarding brake fluid replacement. They replaced the fluid and bled the system, they said they were not satisfied with the result and continued to look for another issue. They found the mast cylinder was leaking. The tech took me on the side and said the fluid that was in there attracted metal shavings that probably caused the master cylinder seal to fail. They would not let me drive the car home and gave me a loaner.

My wife normally drives the car ,but over this past weekend I drover her vehicle. I noticed that everytime I came to a stop and kept my foot on the brake pedal ,it would slowly go to the floor. After experiencing again. On Sunday 10/20/2013, I pulled off the road and checked the brake fluid in the master cylinder, it was full. Having worked in manufacturing , more specifically in the manufacturing of abs automatic braking systems, there are software issues that surface periodically. Unfortunately, they are not handled as quickly, by the car manufacturer ( they design the software), as one would hope.

The contact owns a 2009 Hyundai Genesis. The contact was driving 45 mph when the brakes were applied to stop the vehicle. The brakes failed and the parking brake was used. The vehicle was merged off the roadway and was towed to an independent mechanic. The master cylinder and calipers were replaced, but the issue was not corrected. The vehicle was not further repaired. The manufacturer was notified of the incident. The approximate failure mileage was 83000.

Problem: upon stepping on brakes, reduced brake pressure, longer pedal travel- feeling like possible master cylinder failure, but brakes continued to work. Nov. 15, 2013 received Hyundai safety recall notice 13v-113: replace stop lamp switch and flush/refill break fluid. Dealer completed service Nov 30. Dealer said master cylinder needed to be replaced. Service performed Dec. 5. Dealer then said hydraulic electronic control unit needed replacement. I feel the brake problems are due to the faulty break fluid that was installed by the manufacturer and repairs need to be done at the manufactures expense.

Problem: upon applying brakes, reduced brake pressure & longer pedal travel, feeling like master cylinder problem- although brakes continued to work with greater effort. Nov. 2013 received Hyundai safety recall notice 13v-113: replace stop lamp switch and flush/refill brake fluid. Dealer completed service noc 30, 2013. Dealer said that master cylinder needed replacement. Service performed Dec. 5, 2013. Dealer then said hydraulic electronic control unit needed replacement. (parts ordered. ) I feel that my brake problems were caused by the manufacturer installing inadequate/faulty brake fluid. The repairs need to be done at the manufacturer's expense.

Without warning, the brake pedal traveled almost to the floor of the car before stopping the vehicle. The first occasion happened on August 7, 2013, but the problem corrected itself and the brakes seemed fine until October 20, 2013, when my husband and I were vacationing in the mountains of north carolina, approximately 5 hours from our home. Again, without any warning, the brake pedal went almost to the floor before stopping the vehicle. We made it home safely, but the brake failure was a major safety concern. After seeing information online about a recall of the Genesis related to the brakes, we took the vehicle to the Hyundai dealership in goldsboro, nc, on October 23, and they replaced the brake fluid, which failed to correct the problem with the brakes. They told us the master cylinder needed to be replaced. Based on the history of the problem, we did not agree with that diagnosis and, on October 24, took the Genesis to johnson Hyundai in raleigh, nc, where they determined the problem was caused by a failure of the hydraulic module for the anti-lock brake system. The Hyundai company told us they are currently investigating this very same problem with the 2009 Genesis but the investigation is not far enough along to determine if a recall will be made. Further, that we should have the repairs done (over $2100) and if a recall is made, we would be reimbursed. Johnson Hyundai is trying to help us find a resolution to this issue. The vehicle is only four years old and about 10,000 miles out of warranty; $2100 in a repair bill is a lot of money for us to pay for a brake problem of which Hyundai is already aware. . . . Updated 11-12-13 johnson Hyundai and Hyundai corporation replaced the defective abs module at no charge. Updated 11/19/13.

Had to brake hard to avoid debris on hwy exit. Following that the brake pedal began to intermittently fade noticeably. Within 2 weeks it became a chronic issue. Had the brake fluid flushed and replace. No better, had brakes replaced, no better, had the master cylinder and booster replaced, and again no better. I have spent several hundred to resolve this problem. Recently read an on-line forum where many Genesis owners are reporting similar problems with similar problems narrowing it down. The consensus appears to be that the abs controller is faulty and at a cost of almost $3000 to repair. This is totally unsatisfactory! it isn't just the outrageous cost, but a safety item should not fail as frequently as they appear to be and not on a car that is still relatively "new".

Without any prior incidents or probable causes, the brakes suddenly went "soft", as in the pedal went to the floor and the brakes were practically ineffective. This has happened intermittently since, and from research done online, this appears to be a problem with the abs brake module, yet Hyundai dealers that I have approached about the problem are unaware that this is fairly common, and are reluctant to replace this rather expensive component without toying around with other perceived "fixes", such as replacing the brake fluid and/or the master cylinder.

On a total of four occasions now I have had total brake failure--brake pedal to the floor when moving. The vehicle went to the dealership after the first incident. Multiple parts were replaced. The problem occurred a second time thereafter. I captured it on video, as the problem was not duplicating at the dealership. The dealership determined the brake master cylinder was faulty and replaced it. Almost eight months to the day later (today), the same problem occurred. It is intermittent and random. The brake pedal literally pushes to the floor, almost as if no fluid is in the lines. There are no recalls, tsbs, etc. I have posted this in online forums and sought answers. So far no luck. It is only a matter of time before a crash and possibly injury occur. I am very close to parting ways with the car. Brakes are like jet engines; they really need to work all the time. Thank you for your attention to this matter.