Master Cylinder Replacement? Need Help Please!

Hoping someone here who knows more can point me in the right direction. Truck is a 2010 Toyota Tacoma Double Cab TRD Off Road with 110,000 miles on it. I noticed a spongy brake pedal a few months ago, and took it into my local shop. Shop advised me that the problem was a pressure switch from within the brake booster of the master cylinder (according to a code they pulled from the ABS module). Took it to Toyota who advised me I needed a full master cylinder replacement, as they do not fix particular issues associated with the master cylinder. Cost was upwards of 3000 dollars. The problem is intermittent, it didn't bother me enough to fork over 3000 dollars. Searching the forums, this seems to be a common complaint by several owners.

Fast forward today, I had to get a safety inspection, as I have moved to another state. Shop advised me my truck failed due to the spongy brake, and advised the problem was most likely in the power booster module. I am now forced to repair this item. After calling 8 different shops, most all have advised the only Master Cylinder for the truck is available is from Toyota, and the part is 1400 dollars. I am looking at a repair bill upwards of 2000 dollars with it installed. Has anyone every had this issue before? Are there aftermarket cylinders that are available, or is there anyone who has repaired the switch? Any info anyone has is appreciated!

 

OEM master cylinder should be around 230 from dealer. I know for a fact it is for a 14 because I called yesterday.

 

I believe the Offroads have the hydraulic master cylinder and not the conventional master cylinder, hence the ginormous price tag. ATRAC FTW!

 

There is no "master cylinder" per say it is a pump and accumulator setup. Very high pressures fully hydraulic uses solenoids and such to operate. This is why the steep price tag.

 

Have you tried bleeding the brake lines? Perhaps there's an air bubble. I'm not a mechanic so this is just a WAG to try before spending the big bucks.

 

Is there any codes being thrown?

 

I just saw this episode today and it adresses replacing a master cylinder in a 1990's Mercedes SLK. Perhaps this episode can help you even though you've got a Toyota. The way Ed Chyna explains things is really worth watching these episodes. Your knowledge might be way deeper than my knowledge on mechanical issues, but I gain a better understanding about cars in general when I watch this series.

https://m.youtube.com/watch?v=JAF_ZknWWtE

 

The two systems between these vehicles couldn't possibly be more different.

 

I enjoy that show.

 

Just found this:


https://www.yotatech.com/f123/brakes-feel-spongy-123950/

 

I think poor Edd works for free...

 

Ha he is the show the other guy is a bit of a goof

 

That show more than any other has made me more of a car enthusiast. Edd has to be a genius to be able to work on every type of car imagineable.

Then again they might pull in subject matter experts and/or specialist master mechanics behind the scenes. It's exhausting to see the work that goes on to fix those cars up.

 

OP - do you have a Haynes/Chilton manual for your truck? I always make a point to have one for the cars I own. Even though I never have the confidence to tear into any vehicle, I do like knowing things before I have to deal with a mechanic. Where I live it's hard to find honest ones, so I like to arm myself with info so they know they can't get one over on me.