On multiple occasions, I have experienced issues with the car suddenly accelerating while I'm pressing the brakes. Specifically, this appears to occur when braking on uneven surfaces (ie construction areas, pot holes, etc.). this can obviously become a deadly situation if one is trying to stop the vehicle and with this problem run into the car/vehicle ahead. Most recently this occurred on the surface streets in low speed, in traffic. It feels like the car lurches ahead while applying the brake. I was told by the service people at Toyota that I was making this up. I can recreate it given the right surface.

- Diamond Bar, CA, USA

The dynamic radar cruise control system suddenly applies brakes while, or soon after, passing a large truck (18 wheeler). Happens rarely. But when it does happen, it is always while, or soon after, slowly passing a larger truck on an interstate and traveling about 70 mph. When it does occur, it normally occurs when the front of the Prius is slightly behind the front of the truck (in the immediate lane to my right) where the truck should be outside the range of the radar. The last time, though, the Prius was well in front of the truck, there was no vehicle in front of me. And, yes, there was no dirt, snow, etc. On the front of the car that might affect the operation of the radar.

- Murfreesboro, TN, USA

I have a 2010 Prius. If something happens where I need to use my brakes firmly and the road is not 100% smooth the brakes stop working for a few seconds. I thought it was something I was doing, but I am realizing now its not, its something in the car. In wet weather it does it even more. I have had more then 10 instances commuting 50 miles a day where I thought I was going to rear end someone. The brakes don't work or feel like normal brakes even when the roads are smooth. I have brought it up to the dealership I purchased it at right after I got it. They gave me the impression that it was me getting used to a hybrid car. There was no offer to bring it in and let them look at it.

- San Diego, CA, USA

I bought a Toyota Prius V 2010. I have complained to Toyota about the braking system. I am also filling a formal complaint with NHTSA. Also the back auto dimming mirror doesnt work properly. They cant find a fix. Lane keep assist works really poorly. I would say I doesnt work! also bluetooth systems doesnt work properly. There is a delay in answering the call.

- San Diego, CA, USA