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Brake Fluid question #4610365
12/21/17 04:40 PM
12/21/17 04:40 PM
Joined: Jun 2014
Posts: 403
Clermont, Fl
007 Offline OP
007  Offline OP
Joined: Jun 2014
Posts: 403
Clermont, Fl
How often should brake fluid be changed/flushed? My wife has a 2015 Venza with 9K and we just received a card from Toyota saying it needs a brake flush.

Re: Brake Fluid question [Re: 007] #4610371
12/21/17 04:44 PM
12/21/17 04:44 PM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
Honda says 3 years, then every 2 years after that. BMW says every 2 years.

Mileage really does not matter, it is the fluid absorbing water from the air that matters.

Last edited by mightymousetech; 12/21/17 04:56 PM.

Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Brake Fluid question [Re: 007] #4610386
12/21/17 04:57 PM
12/21/17 04:57 PM
Joined: Mar 2012
Posts: 1,278
San Antonio, TX
E150GT Offline
E150GT  Offline
Joined: Mar 2012
Posts: 1,278
San Antonio, TX
its a matter of preference. I would go no longer than 5 years, but I plan to do it at 3 years.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Brake Fluid question [Re: 007] #4610395
12/21/17 05:06 PM
12/21/17 05:06 PM
Joined: Jun 2014
Posts: 403
Clermont, Fl
007 Offline OP
007  Offline OP
Joined: Jun 2014
Posts: 403
Clermont, Fl
My 2012 Camry with 25K has never had its fluid changed and since owning it new I have never received and similar notice. Both cars bought from the same dealer.

Re: Brake Fluid question [Re: 007] #4610404
12/21/17 05:24 PM
12/21/17 05:24 PM
Joined: Aug 2015
Posts: 839
CA, USA
paulri Online content
paulri  Online Content
Joined: Aug 2015
Posts: 839
CA, USA
This is always done whenever brakes are replaced, right? I don't recall asking for this to be done with either of my cars, but I do get the brakes replaced every 2-3 years or so...


2005 Toyota Sienna LE; 156,000 miles
1998 Honda Civic DX; 202,000 miles
Re: Brake Fluid question [Re: 007] #4610407
12/21/17 05:27 PM
12/21/17 05:27 PM
Joined: Sep 2004
Posts: 1,044
Basehor, KS
JayhawkRoy Offline
JayhawkRoy  Offline
Joined: Sep 2004
Posts: 1,044
Basehor, KS
When I owned two Toyotas in the 1990's, the owner's manual had brake fluid flush as part of the 30/60/90K service. That is when I did it, since that was also at the two year mark, or so.

I would check my owner's manual and maintenance schedule and see what Toyota says today.

Re: Brake Fluid question [Re: 007] #4610409
12/21/17 05:30 PM
12/21/17 05:30 PM
Joined: Mar 2016
Posts: 1,351
toronto
PeterPolyol Offline
PeterPolyol  Offline
Joined: Mar 2016
Posts: 1,351
toronto
9K? Seems a little enthusiatic to me, unless they're recommending it proactively due to a known issue.

Re: Brake Fluid question [Re: 007] #4610419
12/21/17 05:48 PM
12/21/17 05:48 PM
Joined: Nov 2006
Posts: 19,921
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,921
MA, Mittelfranken.de
Every 2 years for most climates, dry places like the middle east or desert climates can go longer. Good preventive maintenance and properly recommended given your location (high humidity).


ASE L1, Master. Deutsch Meisterbrief.
Re: Brake Fluid question [Re: paulri] #4610449
12/21/17 06:31 PM
12/21/17 06:31 PM
Joined: Aug 2017
Posts: 209
Cincinnati, USA
Dave9 Offline
Dave9  Offline
Joined: Aug 2017
Posts: 209
Cincinnati, USA
Originally Posted By: paulri
This is always done whenever brakes are replaced, right? I don't recall asking for this to be done with either of my cars, but I do get the brakes replaced every 2-3 years or so...


No you can't necessarily assume they'll do that unless stated. Also some techs will just bleed out what's in the caliper as they push the piston in but some don't even do that. It's also unusual to need rear brakes done as often as front and if not doing both wheels, I wouldn't expect them to bleed all 4 (again, unless stated).

Re: Brake Fluid question [Re: Dave9] #4610452
12/21/17 06:35 PM
12/21/17 06:35 PM
Joined: Aug 2015
Posts: 839
CA, USA
paulri Online content
paulri  Online Content
Joined: Aug 2015
Posts: 839
CA, USA
Thanks for clarifying that. I'll look at my receipts (if I kept the ones for brakes) and talk to my mechanic to see what he does.

Originally Posted By: Dave9
Originally Posted By: paulri
This is always done whenever brakes are replaced, right? I don't recall asking for this to be done with either of my cars, but I do get the brakes replaced every 2-3 years or so...


No you can't necessarily assume they'll do that unless stated. Also some techs will just bleed out what's in the caliper as they push the piston in but some don't even do that. It's also unusual to need rear brakes done as often as front and if not doing both wheels, I wouldn't expect them to bleed all 4 (again, unless stated).


2005 Toyota Sienna LE; 156,000 miles
1998 Honda Civic DX; 202,000 miles
Re: Brake Fluid question [Re: 007] #4610463
12/21/17 06:49 PM
12/21/17 06:49 PM
Joined: Aug 2017
Posts: 209
Cincinnati, USA
Dave9 Offline
Dave9  Offline
Joined: Aug 2017
Posts: 209
Cincinnati, USA
There are two kinds of answers to this question, well three.

1. Corporate butt-covering and dealership service dept profit from getting customers in for services.

2. People who drive like they stole it, do heavy towing down hills, or just repeat what they read somewhere. They should change it every two years or even more often in severe service.

3. People who realize that brake fluid does not absorb much moisture over several years. That it "can" absorb moisture, and that a minuscule amount can seep through rubber, doesn't mean it's enough to make much difference. These people can wait 5 years or longer.

I have owned my share of vehicles. I have never changed the fluid in less than 10 years (with exception if a wheel cylinder or caliper failed which has been rare on vehicles newer than ~'90s model years) and never had a single problem resulting from it. I do get brake line rust out at around the 20 year mark but this is from the outside of the line, due to salted winter roads.

If you do have a severe duty application and notice undue brake fade, definitely get that checked out and that may be a sign it's time for a fluid change or more. If you notice your fluid getting dark that is the rubber and not a sign you should just replace fluid, rather a sign you should replace rubber if you feel it's excessive.

On the other hand brake fluid is cheap (if you DIY) and a side benefit of doing bleeding more often is that if you are in an area where rust is common, getting the bleed nuts loose every now and then decreases the chances they'll be seized in and break the next time you try to remove them. One thing I would not do is let some kid at a Jiffy Lube do it. You'd be better off not getting it done at all rather than risking a (possibly) incompetent person working on your brake system.

Last edited by Dave9; 12/21/17 06:51 PM.
Re: Brake Fluid question [Re: 007] #4610471
12/21/17 06:54 PM
12/21/17 06:54 PM
Joined: Mar 2008
Posts: 6,824
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,824
USA
Most people never change it, and most cars arrive at the junkyard on the original factory fill brake fluid

I replace my brake fluid whenever I replace the pads and rotors smile

Re: Brake Fluid question [Re: 007] #4610481
12/21/17 07:03 PM
12/21/17 07:03 PM
Joined: Sep 2012
Posts: 5,382
DFW
DBMaster Offline
DBMaster  Offline
Joined: Sep 2012
Posts: 5,382
DFW
I owned my 89 Honda Accord for 23 years. I followed the maintenance schedule religiously, changing the brake fluid every 30,000 miles. After 353,000 miles I was on the fourth master cylinder. I never had to replace anything else, aside from pads and shoes, but I often wondered if changing the brake fluid like that contributed to master cylinder failures. They used to fail around every 100,000 miles.

Re: Brake Fluid question [Re: 007] #4610572
12/21/17 08:37 PM
12/21/17 08:37 PM
Joined: Jan 2017
Posts: 316
NJ
JLawrence08648 Offline
JLawrence08648  Offline
Joined: Jan 2017
Posts: 316
NJ
I change mine every 30,000 miles. You'd be surprised how dark it looks. I only use synthetic brake fluid because I feel it's less hygroscopic.

Re: Brake Fluid question [Re: Dave9] #4610609
12/21/17 09:03 PM
12/21/17 09:03 PM
Joined: Oct 2012
Posts: 4,621
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,621
Taiwan
Originally Posted By: Dave9
There are two kinds of answers to this question, well three.



Well, four


Last edited by Ducked; 12/21/17 09:15 PM.
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