2023 Prius Hybrid LTD TOTAL BRAKE FAILURE IN 4 DAYS

Its under warranty, let 'em fix it. My LTD has been going strong for the last 3 months at 2700 mi with no issues (as I expect from Toyota). However, like this post, I worry about it a bit because of all the new-to-me features such as TSS automatic braking, brake hold feature, automatic parking brake... brakes used to be a simple hydraulic system.
A question I have is: when automatic braking occurs (TSS, brake hold), does the rear brake lights turn on? Or do the rear brake lights only turn on when you press the brake pedal (i.e. a switch in the brake pedal assy)?

 

wow! what a bummer! lesson learned i guess, don't buy the first year of a new generation. i hope they don't have a lot of failures, that could be deadly.
i hope they get you back on the road soon, all the best!

 

Unless the failure can be narrowed down to a circumstance that would have affected only Mr. HIckmans's car, there should been a safety recall of all reasonably similar cars (i.e. have a version of the failing part that is close to Mr. Hickman's) to inspect the car and replace the part if it fails inspection. The recall should also advise what to do and not do to minimize the possibility of the failure happening until the car can be processed.

 

Fwiw, that isn't anywhere, at all, correct.

And, yes, once again, I am going to be that ******, and say:
I'm not going to waste my time to debate or discus something Super basic that has been known for many many decades.

Google:
Infant mortality electronics
Infant mortality mechanical
Infant mortality product
Infant mortality design

.

 

Well, it usually takes a number of complaints to nhtsa, then discussion with the manufacturer, a lot of back and forth, then maybe, you’ll get a recall if they identify anything.
People often die before you get to that point

 

As long as those DTCs were stored, Toyota techs can pull them and figure out which part failed and needs to be replaced. Hopefully an isolated failure but concerning nonetheless.

 

Does this car have a fail safe emergency brake?

 

Oh wow! Ages ago in Delaware, I believe, the annual safety inspection made me start driving and then pull the emergency brake to prove it would stop the vehicle. You could hold the button down while pulling the lever for a controlled emergency stop. When the brake moved to a step-on, step-off control, I used to practice in my head stepping hard on the emergency brake and immediately stepping on it again letting it off for hopefully controlled braking.

The electronic parking brake is the descending pitch "ee-you-p" sound in my 2023 Prime that I was wondering about. I pressed the parking brake button and heard a motor retracting the parking brake, and "PARK" disappeared from the multi-info display. When I briefly pulled up on the parking brake button, and ascending pitch "ee-you-p" sound was heard, with what sounds to be a motor engaging the parking brake, and "PARK" again lit on the display.

So what does Toyota say we should do in an emergency to stop the car?

 

was the op a troll, or just forgot to come back?

 

IDK, but the sprinkling of rando problems has got me pondering the age -old question: "should I buy the first year of a major new release?"

 

agreed, but it's the same with gen 4, a bit of this and a bit of that. toyota isn't what it used to be

 

Additionally, the owners manual states there is a redundant braking system requiring extra effort to stop if the regular braking fails:

●If the electronically controlled brake system does not operate, do not follow other vehicles closely and avoid hills or sharp turns that require braking.
In this case, braking is still pos- sible, but the brake pedal should be depressed more firmly than usual. Also, the brak- ing distance will increase. Have your brakes fixed immediately.
●The brake system consists of 2 or more individual hydraulic sys- tems; if one of the systems fails, the other(s) will still operate. In this case, the brake pedal should be depressed more firmly than usual and the brak- ing distance will increase. Have your brakes fixed immediately

 

This is worrisome. My Prime due to arrive early Sept from Japan. Brought first year of Prius Prime in 2017 and have
had absolutely no issues.

 

you were fortunate, there were a lot of gen 4 issues. even post 2017. nothing major except the coolant leak, iirc.
hopefully, this is a one off

 

A lot of complaints in the OPs post. Seems odd that OP came in and first post is complaints about the car and has not returned with any updates.