general problems of the 2004 Infiniti QX56

My wife was driving home from work, said brake is failing, makes loud grindy, rattling noise when brake is applied. Once the car is turn off and back on, everything is back to normal. When I got home, I took the wheels off to check everything was ok, pads were almost new, which I replaced last year. Drove around for 10 miles no problem. This is a serious safety issue which Nissan/Infiniti should take care of.

I was on the highway driving my family from texas to north carolina when I ran into rush hour traffic long the way. I applied the brake to slow the vehicle down, then suddenly the steering wheel started shaking, there was a lound gridding noise as if the engine about to fallout and my brake didnot hold immediately when applied.

On two separate occasions while the car was moving in a dry parking lot and applying my brakes, my abs brakes kicked on for no reason and the car was difficult to control and stop. The light came on as well and I heard alot of grinding. This was very scary as both times I had my children in the car. The only way to reset abs was to turn off vehicle. I am so afraid that this will happen again and I may not be able to stop. I am now afraid to drive and am thinking about selling it because I feel it is not safe to drive.

Passenger air bag light and dash light is on all the time.

While driving the vehicle and pressing on the breaks there is a cranking,grinding noise and the breaks appears to lock up the slip. Vdc off light illuminate on the dashboard,breaks not working properly.

Coming up to a stop light I press on the brake and it goes to the floor and the abs kicks in for no reason. I almost went through the red light. All of the brake, slip, vdc lights came on suddenly. I turned the truck off and back on again and everything is fine.

Brake does not brake when squeezed scares me the mechanical and did not find the problem I have children.

Stepped on brakes and petal went all the way to floorboard with out stopping the SUV. SUV finally stopped on speed bump a few feet away. Looked in the internet, there are other people with same problem. There is also a couple sueing Nissan for this very problem. I think Nissan should be held reponsible. The problem I understand is in the brake power booster. It should have being recall.

While traveling on the highway to another state, I attempted to stop my vehicle, an 2004 Infiniti Qx56, as traffic slowed and stopped. I pressed the brake pedal and heard a clicking sound and the brake indicator light came on and the vehicle would not stop completely. The pedal began to go to the floor then began to feel stiff. I had to swerve to the side of the road to avoid hitting someone else's vehicle. Once I completely stopped, I got out and inspected the brake fluid level, and the brakes and both seemed to be fine. I got back in the vehicle and after I turned the ignition on, the brake indicator had went off and the pedal seemed to be working fine. I traveled on to my destination without any other issues. Once at my destination, I had the brakes inspected and the repair shop said they could not find an issue. This has happened several more times since this incident, and each time when taken to a repair shop, nothing can be found wrong with my brakes.

Driving with my two young children about 35 mph when I depressed the brakes the car shuttered badly on the front end and the peddle went all the way to the floor and the vehicle barely slowed down. Luckily there was no-one in front of me or I would have crashed. Problem continued until the vehicle was turned off and re-started. Extremely dangerous!!! many other similar accounts and it doesn't sound like there is a difinitive resolution to the problem even after spending thousands at the dealerships.

Car was being driven at approximately 40 mph when the brakes vibrated significantly and failed to engage at an intersection nearly causing an accident. An Infiniti dealer indicated that the brake booster had malfunctioned.

Periodically, on the order of once every month or two months, the antilock brakes become erratic. The pedal goes soft and the brakes engage extremely violently. When it happened the first time I pulled over to the side of the road and called my Infiniti dealer. I kept the engine running while I explained what happened and was told to turn off the engine, wait about ten seconds and then restart the SUV. The brakes worked normally after that. I was told the "computer had to be re-booted". This continues to happen on and off about every month or two. Never was given a satisfactory explanation as to why this occurs. When it happens if there is no traffic around, I put the car into neutral, turn off the key, then restart the car and the problem resolves. If I am in traffic I slow down gingerly, then pull off to the side of the road and turn off the key and restart the engine. This resolves the problem until the next time.

Major coolant issue. Replaced 4 radiators, 1 water pump. All upper and lower hoses. Dealer has had SUV in more than 9 times this year with same issue. While driving coolant smell is in vents. Up the hood and its splashed all over the manifold. Also abs issue. Braking mech makes metal to metal sound and if u cut off car and turn back on. . It resumes as normal.

I have a 2004 Qx56 and have been having brake problems since I first got it. The brakes were replaced under an initial recall in 2005, but a new problem began in 2006 and has been occurring since. Initially, only about once every 2 months, the brakes will sporadically pulsate and the car will come to a quick halt. I would just restart the car and it was fine. The dealership said it was a firmware problem, and "flashed" the firmware. It still kept happening, they flashed the firmware over and over again, and then just said there was nothing more that could be done. Now that the truck is out of warranty, the dealership says it is being caused by a bad brake booster, and will cost $1,100 to fix. But this has been happening since long before it was out of warranty, and now it is happening much more often, almost every day. Review of different Infiniti forums shows many Qx56's, Nissan armadas, and Nissan titans are experiencing this problem. Nissan has put out a service bulletin acknowledging the problem, but their solution does not solve the problem. This should really be investigated further and a recall issued for whatever the cause of the problem is.

Same issue as all other posting. . Loss of brakes, shudder, lights go off. I had it towed in. As it was under warranty, they reprogrammed and redid all brakes. . . Now, same problem 9 months ago. . I cleared everything and it recurred again. . This is lifethreatening. . . I'm amazed no action has been taken with all these posts (and many others on other compliant boards). Will someone have to get killed and then officially start a class-action?.

Severe brake judder for 3 months, brakes have now completely failed , unable to drive car,(2) driver seat memory has failed,(3) rear window washer has failed, (4)driver seat coming apart, (5) windshield washer reservoir will not hold water.

The contact owns a 2004 Infiniti Qx56. The contact was driving approximately 60 mph when he depressed the brakes and lost control of the vehicle. The vehicle was taken to the dealer where the contact was advised that the rotors were severely warped. The dealer made five separate attempts to repair the failure but to no avail. The manufacture was informed of the failure who advised the contact that there were no recalls on the vehicle and offered no additional assistance. The vehicle was not repaired. The current mileage was 46,200 and the failure mileage was 10,200.

While applying brakes, the steering column shakes. After servicing, the same problem continued to have the same problem after 3000 miles.

2004 Infiniti experienced shuddering in the brakes. The dvd player stopped working, the drivers seat memory was inoperative.