This Toyota Rav4 Has a Serious Problem

This Toyota Rav4 Has a Serious Problem


rev up your engines, today I’m gonna show
you how to fix a very common problem that occurs in cars and that’s a mushy
brake pedal, now the owner of this Toyota is complaining that they bought it brand
new and over the years the pedal starts getting moisture and going low to the
ground, they’ve had people look at it but nobody’s fixed it, now years ago I used
to be pretty simple if your brake pedal was getting mushy you either had a leak
in somewhere in a system that sucked air in, and when you press down the air
compresses a lot more than brake fluid or you had a bad master so that when you
pushed on it, it didn’t send the fluid out right and it got mushy,
but of course modern cars are got more complex, now they have ABS systems and if
those modulators go bad they can open and close at the wrong time and give you
spongy brake pad, so your gonna need a mechanic like me to check that
fancy stuff out with a fancy scan tool now if your ABS lights on that’s gonna
give you a code that shows you the problem is but a lot of times they don’t trip codes
and you’re gonna need a machine like this in order to go through the whole
stinking ABS system to activate stuff now to activate them see what kind of data
is coming out can get pretty complicated, now since I have one of
these machines that’s the first thing I did, I went through the system and there
was no ABS problems everything was working ok, so I know it’s not the ABS
system, guys you can’t do it yourself but at least I got rid of the thing that’s
going to be super expensive first, now I always like to get the complex
possibilities out of the way first but you’re not gonna be able to do that so
what you do is get a nice flashlight check all the wheels to see if there’s
any leaks, if there were leaks there would be brake fluid leaking and you’d see it
then, in this case I looked all around the front calipers were dry, the rear
calipers are dry there’s no sign of leaking brake anywhere under the vehicle,
and any way that’s the customers, the original owner and the brake fluid is
still full I asked him if they’ve been adding brake fluid and he said no they
haven’t had to add any brake fluid to it at all then I know there’s no physical leaks,
they had some other mechanics over the course of years bleed air out of the
system but that was really a mistake on those mechanics behalf, if you have air
inside your system it’s gotta come from somewhere, so if you just bleed the
breaks that isn’t gonna fix anything because it’s gotten there somehow and
if something’s leaking and then when you take your foot off the brake
it sucks air through that leak that won’t fix anything, so bleeding brakes is
not a way of fixing anything in a modern car, you have to find the problem then
fix the problem then if you had to open the system out then you have to bleed
the air out of the system, you can’t just say oh I’ll bleed air out of the system
if error is in there it’s enough of a reason, and you got to find the reason
that air is in there so knowing these Toyota’s after working on it for decades
I’m gonna change the brake master cylinder cuz it’s just not
building the pressure up right it’s not losing fluid, there’s no leaks anywhere,
and the ABS system doesn’t have any weird codes, and when I tested it with my
fancy computer all the systems seemed to be working perfectly fine, odds are the
master cylinder it’s just worn from aging that’s very typical with Toyota
vehicles as they age a lot of them get a sinking brake pedal that’s really
nothing to worry about cuz normally just sinks so far and stays there but the
customer doesn’t like it so I’m gonna put this in see what happens,
now again so we just moved the airbox out of the way with the air filter
because the master cylinder is here and we need to get to the bolts, now
as the brake lines that come off the master cylinder are sometimes hard
to get off, so I use these little crow foot wrenches, this is ten millimeter it
fits right over the line and get some loose without stripping them, as you can
see right here it fits over and then when you pull on it hmm, you get them
loose and once it’s loose you can use a regular wrench just down screw it and
then use your finger to get the line out of the way they’re pretty long but
eventually get to them to come off and you do the back one the same way, huh
loosen that then you get a 12 millimeter socket and remove the two bolts that
hold it in place, sometimes you got tug a little bit then it comes out, here we go we
know it’s bad cuz fluid is leaking out of the inside, this should not leak this
should be perfectly dry inside it’s not so we know this is bad we’re gonna
replace it, now we want to hope for doesn’t leak
so get my pump I’m sticking the inside I’m gonna see if any brake food is
inside there and luckily my pump isn’t pumping any brake fluid out of the brake
booster so it should be okay and not damaged from fluid filling it up, so now
we get the new cylinder and it just goes right in you line it up with the two
bolt holes a little wiggling here, then we put the two bolts on they get the
nuts on nice and tight you want them snug, now to bleed the air out it’s
easier with two people first you have someone inside you tell them to step
down on the brake you keep your fingers over the two openings and then you do
that two or three times where they step on the brake you let the air out put
your fingers back on they pick it up and then you say push it down again you pick
your fingers up in the air gets out then you put the lines on, okay push it down
pick it up push it down okay then you get them nice and tight while their foot
is still on the ground and then you tell them to pick it up, pick up, the brake
pedal that sucks the air out now I’m gonna crack both lines and then they
have to step down that pushes air through then you tighten the lines and
they pick it up and you do that four or five times okay push it down and guess
what now it’s got a nice firm pedal that doesn’t think now as you can see a new
master cylinder fix the problem but really there was no way you knowing this
thing was leaking on the inside because you couldn’t see it without taking it
apart you have to do all the logical diagnosis first, and then when you can’t
find anything else wrong you guess that this is bad, now when you took it apart and
follow the fluid coming out you know it’s bad, so the next time your brakes
start to get mushy now you know how to fix them yourself,
so if you never want to miss another one of my new car repair videos, remember to
ring that Bell!

About the Author: Michael Flood

100 Comments

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  2. When I heard Rav4 and Serious problem in the same sentence, I for sure thought it was going to be the 2007-2008 model that burns a quart of oil every 500 miles.

  3. So before I tight the lines to the master cylinder I need help to pump 3 times the pedal and then tight it? And with that done I can put the fluid in the deposit and is it all?

  4. The sinking brake pedal on a RAV4 that is relatively new is not the master cylinder. The problem is with the ABS pump that is not bleed from the factory. To bleed the ABS module you have to use a ABS scanner (5 min work) or drive the RAV4 on dirt road to activate the ABS pump. After this problem is corrected the brake pedal should be hard and firm with engine off. Two Toyota dealerships told me it's a soft pedal design when the car was still on warranty LOL
    Master Tech

  5. My camry does this but only right after its been sitting for a while. Pedal goes to the floor, mechanic said it was fine but doesnt feel fine.

  6. Scortty I need your advice please I'm going to see a rav 4 -2007 w/140k mileage for 6500 . What do I look out for ???

  7. Also seen collapsed brake hose which looked like it was a master cylinder problem until the new master cylinder didn’t fix the issue

  8. I would always use a Safety Stand evens if all 4 tires is on the Car. For your Safety. It's better to be safe than sorry

  9. I have the same problem with my 2009 Prado..changed the master cylinder but it’s pedal still soft…but they work so left it as it is.

  10. Hi Scotty, you are the Sensei of the Mechanic world. The Force is strong with you. A line from the movie the Robots, where Rodney Copperbottom, is a fixer upper and an inventor, comes to mind. His classic question to the other robots was, "all right, who wants to get fixed""? That would be you. I have the same problem on my son's F150. Had considered the master cylinder and always thought that it was very complicated to change. You did it in less than a minute. . 🙂 God Bless, keith

  11. omg.. I didn't know it was this easy to replace the master brake cylinder.  I had horror experience with this part in the past and paid a leg or 2 to repair.  Now, I know the darn shop repairman is the one pulling my leg.  Thanks Scotty for the info.  Just wondering, is this a general replacement instruction in general for all brands?

  12. I have interviewed several mechanics in my area. There is no Scotty types !!!!! What am I supposed to do ????

  13. Scotty, is it possible that my 1999 Toyota Tacoma's breaks had the same problem, cause the breaks on it became very mushy after 5 years. Never had any issues with it besides the starter going out on me & I notice the breaks are too easy to push to the floor. I literally have to pump the breaks to get them to stop.

  14. You admire Toyota so much yet they are always in your shop costing owners money. I guess their good for your bottom line.

  15. No car maker is perfect but Toyota is the most reliable among the North Americans own brand so far

  16. Thanks Scotty. I recently picked a set of the socket/wrenches up. Didn’t know what I’d need them for but I figured if I was in a tight spot they’d help. Lol. I’ll be doing my brake lines on my 2500 Diesel. Guess they’ll get some use now.

  17. My mom has a 2006 blue Toyota rav 4 (2.4L inline 4 cylinder engine & automatic transmission) with 265,000 miles on it and is running good. She is the original owner & it is a standard base model Toyota.

  18. Hi Scotty!, My 2010 RAV4 cranks but won't start and was running fine last night any guesses as to what might be the issue?

  19. Once fixed a hard line leak on a car, after it sat waiting for about 6 months. Bled the lines, and shoot, the pedal goes to the floor still, but hey, no leaks, and there's some breaking force.

    Seals on the Master went completely bad while sitting. After putting in the new one, I realized how far the pedal sank before.

  20. i took my rav4 to my mechanic and i told home about this, he laughed in my face said master cylinders rarely go bad. he ended up finding that 2 calipers had gone bad so he replaced them. my brakes still feel squishy to me. 😒

  21. Hey Scotty , I have a Rav 4 1998 & it died after overheating i don't think i have a cracked valve or blown gasket i have spark & fuel ok but it will not start, any ideas please ?

  22. Scotty! I’m steving from Haiti.. I have a RAV4 limited 2007,4WD light is on,my lock Button for 4WD Doesn’t work..My mecanicien scan the Car,and found no code OBD 2..He told me,is probably an electric problems..What do you think about that diagnosis?

  23. Due to excessive grunting in this video, and repeated mention of "pulling" and "tugging", satirical photos have not been added in order to keep it PG-13.

  24. Check all the recalls on Toyota's they all got serious problems. U pay alot of money for the name their not know for their quality no more.

  25. Just remove the air cleaner housing for god s sake don’t be lazy ! Otherwise u will bend or stretch the rubber tube and put the dirty rag or paper tower under the master clyinder , dont want the fluid ruined the car paint .If u can’t find the any leak outside of the car. Just look inside the car u will find brake fluid against engine wall . Before install the master cylinder , bleed it out first that what the manual come with the package says . Just want to helps here

  26. My 2003 RAV4 with 98,000 miles doesn't shift right anymore. Sometimes it has no power and then jumps into gear

  27. Thank you. I learned a lot from your youtube on how to diagnose car problem. By the way, you should offer in sign language as well since you made a lot of hand movement as you explain the topic 🙂 That would expand your scope of audience.

  28. Your a genius ! Wishing you all the best with the law suite. Pull those dirt scammers through the mud.👍

  29. Hah! Master cylinder behind the air box. Cause that car was originally designed as rhd. On the rhd diesels the fuel filter sits in the same spot and you also have to remove the air box to get to it.

  30. Hey Scotty, what do you think about 2009 Toyota rav4 v6 is there major problems with this engine ?

  31. I need help, 07 rav4 ac blinking..change relay and condenser, compressor still running….just cant figure what's the problem…still have freon in it.

  32. Scotty, my fu*king Rav4 has the EXACT same problem. It began right after I changed the rear pads, and ever since I been going nuts trying to correct this soft pedal on my 2007 RAV4. I've probably bled the system 4 times properly with no improvement. Last resort I just replaced the Master cylinder with a brand new Raybestos MC…bled again twice, and still a soft pedal. I am infuriated at this goddam car. Only option is to take it to a local reputable import shop and have it power bled, which I hope bleeds the ABS. It better work or I'm shooting this damn car.

  33. The master cylinder pin to pedal connection instantly jumped out of place knowing Scotty was about to yank it out…good little Toyota…😂

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