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How long do master cylinders last for? Anyone had one go bad?

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Old 09-06-13, 11:29 AM   #1
Lukas99GS
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Default How long do master cylinders last for? Anyone had one go bad?

Getting around to doing my front brakes, lexus told me a caliper was jammed and needed replacing, found out I was just a stuck slide pin, but anyways my brake pedal is extremely mushy and you have to press down pretty far to brake, it does still brake fine but my friend told me that can be a sign of the master cylinder going bad, I think maybe a brake fluid flush could be the issue, how long do master cylinders typically last? Are they an issue on the GS? Mine has about 191k hopefully that isn't even the case though he was just speculating
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Old 09-06-13, 11:58 AM   #2
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The 98-00 go belly up pretty often. Ive had problems with 2 of them. It may not be the MC that goes bad but other parts that are bundled up with it.

U can upgrade to 01-05 ones, just have swap the pressure sensor.

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Old 09-06-13, 12:15 PM   #3
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Is there a difference in the 98-00 from 01-05? Like if I ended up having to replace their not all interchangeable?
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Old 09-06-13, 01:09 PM   #4
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not to sure if they are interchangeable but I recently had to change it. but mine got to the point where I had to mash the pedal on the floor for the car to stop. don't wait till you get to that point! its very hazardous, I almost rearended someone that wasn't paying attention and braked at the last minute.
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Old 09-06-13, 07:13 PM   #5
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Mine isn't that bad, I can still stop fine, I'm hoping changing the brake fluid will make the pedal a little more firm, but just curious how much that cost you? I kno their like 1600$ new but on eBay I've seen em for 4-500 used are they tough to install?
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Old 09-06-13, 07:55 PM   #6
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Yeah they're like 1700 new on Ebay or around 1900 new from Sewell Lexus. Used they range from 400-700 bucks. It's real easy to replace only a few nuts and a few connectors.
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Old 09-07-13, 12:20 AM   #7
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Quote:
Originally Posted by rgarjr View Post
Yeah they're like 1700 new on Ebay or around 1900 new from Sewell Lexus. Used they range from 400-700 bucks. It's real easy to replace only a few nuts and a few connectors.
Did you just go used then? No problems after that?
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Old 09-07-13, 03:55 AM   #8
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Hey,

I have a 2001 GS430. Mine just died at 167,000!! not bad. When I took it apart a piece of the comutator had broken free. The hydraulic motor was the fault. Ordered a used one. Easy to install. Need 2 people to bleed the system, makes it easier. best luck.
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Old 10-25-13, 09:55 PM   #9
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What are the main symptoms for this happening?

I just did a brake fluid flush done because of a soft brake pedal and low brake fluid level. The brake fluid level has gone low again (in between max and min).
Is there any way to pre diagnos this?
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Old 10-26-13, 07:34 AM   #10
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Quote:
The brake fluid level has gone low again (in between max and min).
It's normal for the fluid level to go down as your pads wear. When you put new pads in, the level will go back up. If you're actually leaking fluid though, that needs to be fixed and might be the cause of all of your problems.
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Old 10-26-13, 02:37 PM   #11
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Brake fluid level will drop as the pump starts to build pressure and stores it in the accumulator.
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Old 12-30-13, 11:11 AM   #12
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Thank you for the info.Do you have a complete master cylinder for sale
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Old 12-30-13, 11:11 AM
 
 
 
 
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brake, conditions, cyclnder, cylinder, cylinders, last, lasts, lexus, long, master, normal

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