2012 Toyota Prius hydraulic brake booster DIY

You could try the sites search function.

 

some are installing salvage with good success. 128k seems early, get tech stream first and confirm the diagnosis with the service manual at techinfo.toyota.com

try calling toyota corporate for good will warranty help.

 

I got an estimate of 3800 from the dealer. What really got me concerned was the part was on sale from the same dealer for 501 and I was charged 901, just for the part! The 501 was also just for the part, no labor.

 

Did you ask the dealership about it? If I ran into this type of situation that would be my first attempt at solving the problem. Posting it on PC just makes finding surrounding yourself with ignorant comments. FWTW

 

Using the inexpensive Chinese know off of techstream can be a big question mark in any mechanics mind while doing a repair on a Prius. The alternative is spending big $ on the approved pass through adapter and renting the latest techstream software from https://techinfo.toyota.com
There are a lot of other posts here at priuschat about the DIY proceedures involved with the brake booster brake accumulator repair I found by searching brake booster ! priuschat.com at duckduckgo.org - the 5 pages of posts might inspire you or the opposite and it's not all DIY recommendations as you'll hopefully understand as your read, if you do read it.
https://priuschat.com/threads/brake-booster-accumulator-actuator-issue.228295/
there are plenty moire on the subject besides that may also show up for you as they did for me using the search box here at priuschat after finding just one thread on the subject, read up before diving in .
I have a post for the easier brake job issues I found with my Prime at 36K miles.
https://priuschat.com/threads/brakes-the-good-the-bad-the-ugly.220344/
@Mendel Leisk was a big help and may have links in his signature for brake booster tips too....

 

have a Toyota TSB in pdf format, with instruction on replacement, but Priuschat won't allow pdf upload.

 

Thanks Mendel
After reading @ChapmanF s post
https://priuschat.com/threads/braking-by-wire.245350/#post-3409663

I realized I'd forgotten to mention that I think it would be a good idea to get a $20 - 2 day subscription to the official techstream documentation for your model from techinfo.toyota.com
So you can compare the trechstream you already have with the full versions documentation which includes the latest procedures for the job, and may have more reading of tips and recommendations linked with blue dots in the documentation that might not be included in the version you have.

this post by @Elektroingenieur referencing the Gen 4 brake systems documentation may also provide some insight into what is included with a techstream subscription
https://priuschat.com/threads/prius-4th-gen-brake-diagram.208330/#post-2921472

found after following @ChapmanF link in his post - I linked to above.

 

Little naming quibble to keep things straight: TIS (technical information service) is the name of the website where you can go subscribe and look at the repair documentation for the car.

Techstream is the name of some software you can put on a Windows laptop to talk to the computers in the car.

There is a connection between the two: if you have the official Techstream installed on your laptop, you have to go to the TIS website and subscribe, in order to activate the software.

But still, Techstream is the name of the software, and TIS is where you go to find repair documentation.

 

I don't have the Techstream software yet, which might be one of the reasons I keep getting the details wrong, even after being reminded so many times. I have registered for the Technical Information Systems 2 day standard subscription few times already and hope to get the details correct when recommending it in the future.
Thanks for being patient as well as continuing to remind me.

 

Another thing about repair manual and TIS is that with TIS the repair manual is also available with a subscription, so I lumped them together as a package deal and just referred to the both as Techstream or Techstream subscription.
One of the reasons it's taken me so long to get on board with the TIS moniker is it confused me even more when I searched TIS and got hits to non public logins as well as the techinfo.toyota.com and didn't even know what TIS stood for after seeing the dealer logins when searching TIS.
I hope this makes sense and I'll be able to keep the differences separate enough to be a bit less confusing to me and perhaps others, while being technically correct enough to not need to be reminded that the Techstream software and the repair manual R actually different products. And an up to date repair manual might not even be included with many of the Techstream bundles available at Amazon, eBay and Ali.

 

Aloha Mendel,
I would love to receive a copy of that .pdf.

 

Thank you!

 

Thank you very Much! Turns out I did not need the info there. . .and It was helpful to have and understand. After being quoted $3700 to replace the ABS modules, I found the parts online for $1100(ish) and replaced them myself. I figure I made about $130/hr for the time spent and amount saved. Win!
I did discover that having the car level for the Linear Offset calibration *is* actually required. Once level everything went off without a hitch and my brakes are solid, no more dash warning lights or error coeds. Could not have been successful without the forum here and, specifically, your involvement. Very Grateful for you!
Cheers,
Wayne