Braking problem

It gives me a start too, even though I understand it. It's a very unnatural feeling.

Tom

 

comment deleted.

 

Now I know what you guys are talking about. 800 miles on my car and it has happened once, yesterday. Literally had my heart in my throat. I have never felt anything like this in my gen2. I felt like the brakes suddenly went away and I had to push down pretty hard to activate them again, took quite a bit longer to slow down than I expected and I missed my turn. Fortunately no one was ahead of me.

This is definitely not the transition between regen and friction brakes we feel at about 7 mph. This is a very sudden and frightening loss of braking power.

EDIT: If there is another thread on this maybe they should be combined.

 

Doug Coleman definetely needs to comment on this.

 

I don't know... my service department (manager) didn't even know what kind of oil the car took.

 

I agree that "team Toyota" will not answer this kind of question. They are, as you said, marketing people and they do not answer questions that are critical of the car anyway.

The problem with going to a dealer for this kind of issue is the technician will drive it around the block, step on the brakes a couple of times, and tell you "feels fine to me, you don't have a problem". You may well be considered a chronic complainer if you persist. I know because that is exactly what I run into when I had suspension problems with my Gen2.

Might be better to report the problem to the NHSTA, if they get enough complaints they will take some action, maybe.

These kind of intermittent problems are always difficult for the owner because the technicians at the dealerships simply are not trained or motivated to find problems that only occur occasionally or only happen to a few vehicles.

 

Well put. I like concise, clear, and civilized language.

Thanks,
Tom

 

I have had my V with NAV since early June and it has happen to me about four times...and it scares the S... out of me all four times. I really hope that it does not pose a real problem besides just giving us cause to change our underware

 

This is an easily reproducible phenomenon, at least in my daily commute. I have a stop sign on a downgrade that is also a bus route. The bus tears up the pavement leading to the stop sign, so there is always some kind of bump or pothole. You gotta be on the brakes to 'stop' at the sign before the bump, so almost 100% of the time I get the phenomenon.

If you're going to take it in for service, I recommend you find a similar road condition in your area where you can readily reproduce the effect.

 

If you are right and this is not going to result in a loss of braking or occur at higher speed I can live with it. But as Basspro said it is pretty frightening. I think I have some idea when it might occur now and hopefully I will be prepared for it next time. I do think it is something that shouldn't happen, if it is a normal operating variance then it shouldn't be. My brakes should be predictable, of course the adrenalin rush was kind of thrilling.

 

Exactly right.

 

You have no choice but to live with it. It's either that or sell the car. There isn't something broken on your car that can be fixed. This is just the way the Prius was designed. Perhaps a future upgrade could change the behavior, but don't hold your breath.

Tom

 

Yes, thank you, I understand it is a design problem and not a defective component. I suppose if there were an easy inexpensive fix they would have implemented it by now. I certainly have no intention of selling the car over this, I am growing quite fond of it after only a week of ownership. But as I stated previously it is a real shock when it first happens and I lost some confidence in the braking system.

 

I thank everyone for your input and advice. I am somewhat relieved to know that the problem I posted is not uncommon and that others have reacted similarly to this phenomenon.

 

It is a shock when it happens, but let me tell you from experience, the Prius brakes really work when you need them. If you mash down the brake pedal, you are going to stop right now. I just about put myself through the windshield the first time a deer ran out in front of my Prius. Wow does it stop. Brake assist is a wonderful thing.

Tom

 

Very good to know, thanks Tom. I am going to test mine but I want to put some more miles on them first.