2003-2007 brake failure

XtraSlow_XtraCab

New member
Hey all! New to this site, but not new to Toyotas (1979-1995 more specifically, I have a "1987" 4Runner that I built from parts) and wanted to post this while it was fresh in my mind. My dad's Runner has had brake issues since he purchased it and after several trials and tribulations with the Toyota dealer... we have found a solution. The reason I am posting this is because I have seen submittals of similar scenarios with these Runners and wanted to post in multiple forums in hope that perhaps it will help someone else:

"My father's 4Runner has had this problem since he purchased it used about a year ago. The brakes would intermittently hit the floor, or engage but with rediculous pedal travel.

Of course Toyota couldn't find anything wrong... typically the case when they send some kid out with an ASE certification that he slept his way through

Anyway on the last visit we specifically asked for their oldest, most experienced tech. Luck was on our side because the brakes actually did hit the floor and the tech almost hit a van parked in the service bay.

My reason for posting this is that I had done my research over the net and found that multiple brake problems have been occuring in this generation of 4Runner, but without answers.

For the longest time I had poked and prodded my way around the FSM thinking that the booster motor was not kicking on enough, or the ABS was being spunky. I would have jacked it up to check the calipers, but it never lost fluid... so I didn't. Which is why I never found the answer myself:

As it turns out the front wheel bearings have been horribly blown. This explains why the dealer we bought it from was gracious enough to install new tires that, as coincidence would have it, kept throwing wheel weights. Interestingly enough there weren't actually any shimmies or drifting to one side.

Anyway... I just thought I'd share this information for anyone (like myself) trying to figure out why their brakes are failing. I'm suprised the dang wheels haven't fallen off and why, more so, the tire shops did not bother to check bearing play while they were squatting down in front of the rotor and re-installing the tire. I think this just goes to show the incompetence of today's "mechanic". "
 
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Hmm, that's an interesting story. Could see wheel bearings being the issue, though honestly I would have thought that if they inspected the vehicle for your complaint they would have checked bearing play also since its right there along the way of their diagnostics.

Its probably not that they aren't good mechanics, but they lack experience or a lot of hands on experience. Many schools these days take your thousands of dollars and rush you through their program to ship you off into the field.

Though, like I said, if I were inspecting your vehicle for your complaint, I would have had the vehicle on a lift where I'd check for bearing play, since I'm going to be taking off the wheels afterwards to inspect the calipers and such.
 
How do blown ?
wheel bearings affect brakes to to point of complete fail ?
Heat ?

I've got one groaning a little bit now, for the past 1K miles or so actually...
 

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