It sounds like it must be the Brake Actuator/Booster, C1319

2013 Prius C
195k miles
Houston, TX
No major repairs
New NiMH battery as of Feb 2024
Significant FL quarter-panel damage from a side-swipe
Error code C1319

So about a week ago, the brake pedal lost almost all of its resistance while driving. I assumed master cylinder, but in researching, looks like for a Prius, it's actually the brake actuator/booster. [Master cylinder is contained inside the BA, I guess?]

I understand the code specifically identifies a detected leak/loss of pressure inside the unit. I also understand this could either be inside the actuator or the pump/accumulator.

I've watched a few videos, and the replacement doesn't look overly advanced. Tedious and long, but doable. It's the calibration at the end of the process that all of the DiY video-ers discourage for at-home repairs. Everyone says you really need to take this in to get it done. And that appears to mean anywhere from $1500-$4k, depending.

I've got a handful of questions:

• Is 200k nearing EoL for a Prius C?
• In anyone's opinion, is a likely $2k+ repair worth it, at this point? Or is this the beginning of a series of failures, now that my car is this old?
• Or... (and this is my hope... haven't had a car note in 8 years), do these little buggers typically chug along for 250k, like many Toyotas?

Or...

• Is this a doable repair in my driveway?
• If I buy a Techstream device, can a rank amateur work out the bleeding down and calibration of the brake lines?
• I see most Techstream devices are pretty friggin' expensive. Are there any devices that would accomplish this that aren't going to break my small bank?
• It looks like the parts (when bought through reputable sources) average about $1400 together. Any pro-tips on affordably sourcing these parts?

Thanks a ton for reading and helping!!
Grace and peace,
Matt