2023 4runner break booster?

I've seen on the 2023 4runner that behind the master cylinder( brake) came with a booster instead of the hydro assist unit that traditionally the 5th gen had, any comments about it?? Why the change, thanks in advance

 

2wd? Works fine.

 

Yes 2wd, are u asking or telling me if works fine?? So far works fine, in my opinion the traditional vacuum booster is way more simple and reliable

 

Since you have 2wd there is no need for the hydro assist for the traction control systems like ATRAC and mall control so you get the standard vacuum assist unit. It works well for the task.

 

Wait, I’m confused about what the OP is asking about, and/or terminology. @Daddy83 , are you saying you saw a 23 2wd 4runner with a traditional manifold vacuum boost? And are you saying you have a two wheel drive with an electric-hydraulic assist?

I agree, traditional manifold vacuum boosters are simpler…well maybe not, it might be that they are more traditional. That said, I’ve heard the electric hyd assist provides more consistent performance, which would be good when A-trac is hammering away.

My 21 4wd has a electric hydraulic assist, not engine/manifold powered vacuum. So does my 18 Highlander. However, here is the interesting thjng… the Highlander’s electric unit is life-limited to 120,000 miles, at which point the manual indicates you need to replace it ($$$). I found about this gem of a maintanance item after I bought it. Still cant believe toyota is serious about that. Basically, the brake assist lasts a little bit longer than a set of pads????

Nothing like this is noted on the 4runner maintanance schedule, so Im not sure why the highlander requires replacement. But it does make me a little nervous that one needs it, but not the other. I almost bought a 2020 Corolla and checked the manual. It also called for replacement of the electric booster at 120k.

I think I remember watching videos on replacement of electric hydraulic assist units on Land Cruisers. So I dont think they are new.

 

Well mine 2023 came with traditional vacuum booster (which I believe is a way simpler and stronger system), not electric and yes I was aware that the hydro assist have a limited life due the electric motor will have issues. There's a channel called the car care nut, that guy has a ot of info

 

Definitely will pull up his videos on this.

 

https://youtu.be/fkQQ6Upt4SE

 

2wds get the donut vacuum booster.

Are you sure that's not just the fluid? The maintenance manual doesn't list component life.

 

With this system is just the fluid, with the hydro assist is different

 

Maybe there’s compressor oil but I have never seen anyone mention changing it. It’s possible the brake fluid is the lubricant.

 

Check the video I shared in previous answers

 

He doesn’t say much of anything about it except how it functions.

 

If this question was about my 2018 Highlander (sorry to have derailed off topic a little), this is what the maintainance book says:



It doesnt look like the same “all in one” unit the 4runner has, but last time I checked, the vacuum pump was around $1000 for the part alone.

Oh yeah, flipping through the manual also reminded me that spark plug replacement on the highlander is 60,000 miles.

 

Wow! That's crazy that they recommend a mileage for it but I would have never believed it. My 2010 Tacoma hydro booster never failed up until 145K miles when it was totaled.

 

Yeah, bit disappointed in the amount of heavy maintainance the 18 Highlander has. Time limited major components is something you see in aviation lol. I was all happy it had a timing chain and I wouldn't have to worry about it at the usual 100k miles. But all that got washed out, more so, with the 60k spark plug change (hello 1985), and the vaccuum pump deal.