Problems with 2006 Lexus RX 400h SERVICE BRAKES, HYDRAULIC

Unexpected vehicle acceleration - lack of adequate braking during disengagement of hybrid regenerative braking.

I have 2006 lexus rx 400h and have the same problem with my brake as prius has. when i slow down a car and my car hits a rough patch of surface, or pothole, the brake seems to release and i experience 'brake surging'. several instance i almost hit a pedestrian because the car surged forward at an intersection. i brought the issue to the lexus dealer but they said they could not replicate the problem during their examination. help! *tr

I have experienced the exact braking problem in my 2006 lexus rx400h as described in recent "car guys" column. while coasting to a stop with foot lightly on brake pedal, if i suddenly step harder on brake, it seems to disengage for a second before the brake takes hold again. my guess, same as the car guys, is that there is a slight delay in switching from regenerative braking to regular friction braking. it is disconcerting, but something i can live with as i am a cautious driver -- leave plenty of following distance, etc. this has happened occasionally, at various times, so "incident date" is fictitious just to get through this form. *tr

I was approaching a light intersection at 50mph. when light changed to red i tried to apply brakes about 1,000ft from intersection. car did not slow down and brakes appeared not to be working. i veered into median to avoid stopped traffic in front of me and then entered intersection clipping the back of another vehicle. lexus dealer reported no defect with brakes. this vehicle had been stored in a florida garage and it was the 1st time it had been driven in several months. this has not happened again to this vehicle to my knowledge. *tr

Brakes failed on two occasions within a week. brake failure lasted for about 10 seconds and then brakes returned. during that time the dashboard warning lights lit up and a loud buzzer went off. was able to stop the with great difficulty. fortunately neither incident required an emergency stop. *ak

Vehicle was normally maintained and lightly driven. one year of age of the vehicle, when driven on level dry surfaces, the braking of the vehicle became erratic and remains erratic. in everyday use the vehicle will tend to overbrake or underbrake depending upon the mechanical loading of the hybrid drive. the onboard firmware is not properly accounting for integrating the stopping power of the brakes and the hybrid drive. this causes driver confusion and in some cases hazardous failure to brake conditions when the hybrid drive unexpectedly and erratically ceases it's contribution to the braking force of the vehicle. i.e. if the driver does not immediately compensate, the vehicle will lunge forward at low speed and within a few feet of pedestrians and other stopped vehicles in traffic. the dealership states that nothing can be done and that erratic/loss of braking is normal for this model. there are no recalls or sbs posted to upgrade the firmware, braking/hybrid drive systems. lexus rx400h, 2006 model. *tr

Lexus rx400h, accelerated while brakes were applied causing an accident. also the vehicle's brakes were such that the there was a slight delay that had to compensated for or you would pass intersections or turns. the vehicle still accelerates at times when brakes are applied. *tr