Need help with my breaks 2013 Tacoma baja

I need a new break accumulator and I’m wondering if anyone knows if this part in eBay will work? Don’t wanna spend 400 dollars on a new one from Toyota if I don’t have to. Toyota says the part number is 47950-04010 and eBay is 47950-60020. I think it’s for a fj cruiser but they all look the same. My breaks are super spongy and when I bleed them it fixes it temporarily but goes back to being spongy again.

 

What is a brake accumulator and where? Never seen this on my truck. I believe there is a vacuum booster assembly like on any regular car.

 

If this is on your Tacoma I need to see a picture of it.

 

Only the hydraulic booster which is almost exclusively equipped on TRD OffRoad trucks has that but it's not considered a serviceable item on Tacomas, Toyota only sells the complete hydraulic booster/master cylinder/ABS unit as an assembly.

All other trucks have a standard vacuum booster and master cylinder setup.


In any case I doubt that would be your issue as the accumulator's job is to provide a pressure reservoir to store pressure produced by the electric booster pump so the pump doesn't have to run all the time.

 

sounds like communism

 

That’s exactly my problem, I keep losing pressure, if I’m stopped long enough the breaks don’t hold and I slowly start moving forward again. I have to re apply the brakes or press harder and harder to stop again

 

Then I believe you have something else going on in the booster unit because the accumulator doesn't create pressure it just stores it, the pump should run when the pressure is low to replenish it. That tells me either you have something bypassing in the unit or the pump isn't coming on when it should to replenish the brake pressure.

The only 2 things that can happen to the accumulator canister is it loses it's gas charge so it can no longer effectively store pressure so the pump would have to run more or it leaks externally which would be fairly obvious.

 

I do hear the pump working when it needs to, but I checked the codes and it says it’s the accumulator. When I’m stopped long enough it’s like I slowly loose pressure. I don’t see it leaking anywhere

 

You may need to bleed again and also bleed the ABS system. With the Off-Road models with ATRAC (which should include the Baja and Baja T/X), you can utilize the Toyota Techstream software plugged into the OBD II port to do a bleed where it actuates the pump to get all the air out.

EDIT: I see you posted there is a code stating it is the accumulator. Good luck!

 

Your BRAKES are broke.

 

I had never heard about this so I did some reading on the subject. Seems the accumulator type brake systems are common on hybrids and electric vehicles because they don't have a continuously running ICE motor generating vacuum for a booster. I read where some guy with a Prius had an issue similar to yours. Dealer quoted him $3k to fix it. Sounds like if you can get away with only $400 out of pocket you'd be doing pretty good. But the repair may not be that simple.

 

The accumulator is coding because it has a pressure sensor and that sensor is seeing a pressure drop when you hold the brake. The "computer" doesn't know exactly where the pressure loss is occurring, all it knows is its supposed to see X amount of pressure in the accumulator and it's not seeing what it expects to see.. so it sets a code

I've seen this before on hybrids where the electric pump was weak and couldn't build pressure, so it would code

Or something leaking internally inside the unit, so it codes..

Realistically the fix is to replace the entire unit. As long as you don't have any fluid leaks anywhere else like a brake line or something down at the wheels

 

OP, the accumulator does indeed appear to be a serviceable part and after a few quick checks with a number of discounters, using my '14 TRD OR as a reference part number, there seems to be plenty new available for roughly $260+ish. Obviously your specific part number would have to be refined for a specific search as there is a difference between manuals and autos, as well as whether you have a tow package.

But on to the specific problem. There are some diagnostic steps Toy has for determining a suspect part on that thing. One of the more common failures appears to be the solenoid (amplifier) itself. And I have yet to read of an accumulator going bad...

Those hydraulic booster type systems can spit out a few codes and one such is C1452, Accumulator Low Pressure (aka C1256 in the factory service manual), where the prescribed fix is to replace the solenoid. Unfortunately, even though the solenoid is somewhat less expensive than the entire unit, its still way up there in price to make one wonder if that piece alone is worth the gamble IMHO.