Is it age or mileage?

Geo-TH,In · Sep 13, 2021

How many miles or years do you get out of a master cylinder?
I have a rule of thumb, 15 years or 150,000 miles and things with rubber Components begin to fail.
On average, how long have your master cylinders lasted??

Bret4207 · Sep 13, 2021

I have never had to replace a master cylinder. Wheel cylinders, yes, but never a master. I don't own anything newer than a 97.

MarkB_MI · Sep 13, 2021

Well, if your son mistakenly puts power steering fluid in the brake reservoir, about one day.

Traditional Farmer · Sep 13, 2021

Toyota Corolla 270,000.Ford F550 165,000 original master brake cylinder in both.

Bill(Wis) · Sep 13, 2021

I haven't replaced or hired anyone to replace a master cylinder in over 50 years and I keep my vehicles for hundreds of thousands of miles. My wife's BMW was 23 years old with 275000 miles on it with the original master cylinder. Just about all of my vehicles in the last 25 years have been Toyotas with no master cylinders replaced. The only car I remember having the master brake cylinder replaced was my 1964 Olds 98 in about 1969 or '70.

Bill(Wis) · Sep 13, 2021

I haven't replaced or hired anyone to replace a master cylinder in over 50 years and I keep my vehicles for hundreds of thousands of miles. My wife's BMW was 23 years old with 275000 miles on it with the original master cylinder. Just about all of my vehicles in the last 25 years have been Toyotas with no master cylinders replaced.

Bruce from Can. · Sep 13, 2021

I have had to replace two master cylinders over 46 years. Both were on older high mile vehicles. Seals dont last forever.

D Slater · Sep 13, 2021

99 GMC 2500 around 230000 never changed. Brake line to rear yes. 95 ford ranger, odometer quit working around 250000, never changed. Brake lines yes. Don't remember changing any after 1969.

jsr8011 · Sep 13, 2021

That's almost better than today's funny.

jsr8011 · Sep 13, 2021

Sorry, I posted out of sequence. Was referring to post about son using wrong fluid.

gab · Sep 13, 2021

I've never replaced one on any of my cars or trucks but I had to put a booster on my 97 Jimmy. Jimmy was the only dog/lemon I ever had, every thing turned to junk on that except the sun roof.

MARK ROBKE · Sep 13, 2021

'97 Ford Ranger with 365,000+ miles never any brake issues. '03 Chevy p/u with 225,000 miles rusted out brake lines, but master cylinder is fine; it did need 2 rear calipers recently because they were hanging up, not leaking. I cannot remember replacing one since the '70s. Mark.

MarkB_MI · Sep 13, 2021

> Sorry, I posted out of sequence. Was referring to post about son using wrong fluid.

Also had to replace the ABS unloader valve (old GM rear wheel only system), proportioning valve and rear wheel cylinders. I was able to clean up the almost-new calipers and save them.

Steve@Advance · Sep 13, 2021

Used to be the old style cast iron cylinders would rust pit. I would call that age regardless of miles or driving habits.

The newer aluminum, and improved fluids do much better. But occasional they do fail, usually after a brake job, and the cylinder gets pushed down further than it's used to going, and runs into the dirty part of the cylinder.

City or highway driving, driving habits, loads, all will make a difference.

Is it age or mileage?

Geo-TH,In

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Bret4207

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Traditional Farmer

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Bill(Wis)

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Bill(Wis)

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