If the fluid is more than a couple years old and is dark and nasty looking, suck it out of the master cylinder, pour fresh dry fluid of the correct type in, and bleed all four wheel cylinders/calipers starting with the right rear till the fresh clear fluid comes out. I usually change mine every time I do a 4 wheel brake job, usually every 50-60 k miles. On my motorcycle I flush it out every two years. I have no brake hydraulic problemswith any of my vehicles.
PS should be 18000 miles and brake fluid about 30000 miles PS should be 18000 miles and brake fluid about 30000 miles
once a year
If, as you say, it needs doing then it should be done as soon as possible. Brake fluid seldom needs changing though it does degenerate over time, mainly by absorbing moisture. The precise detail will be in your manual. The fluid reservoir needs checking topping up occasionally and certainly will require it after a brake pad change.
It depends on the type of fluid and level of contamination or heat. if there is no problem with the fluid it should be left alone!
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Usually every year or two you need to change it check your owners manual for their specifications
brake fluid changes and brake inspections should be done atleast every two years, mainly the brake fluid has a tendancy to soak up moisture in the air and then this accumulated water tends to boil in the lines and calipers and brake cylinders during use, causing air pockets and a degradtion of braking, and can cause a complete loss of brakes at times.
You do not need to change it at all, unless you have replaced some long brake lines. Just make sure that the level of the fluid is proper.
You should check your brake fluid every three months to make sure the levels are okay. If the levels are down, replace the fluids immediately...better safe than sorry.
100,000Km
Change the fluid and filter every 36,000 miles.
You should change your automatic transmission fluid in Toyota gearbox at least after every 30,000 miles.