Brake fluid must be changed every two years at most. Since it is hygroscopic--that is, it absorbs moisture/water over time. with our tropical climate, this problem is exacerbated. Fresh brake fluid helps resist brake fade and give better brake feel and modulation.
Change in steps Get a Turkey baster and syphon brake fluid from master cylinder and refill with new Every time oil is changed Take out the moder cap, and then pour in the fluid.
Over time brake fluid absorbs moisture. The more moisture in it the more likely it is to freeze if you are in cold weather, and the more the seals break down.
Time to add dome brake fluid.
You top off brake fluid when the brakes are changed. If the brake fluid is low there is a reason. Get them checked out at that time. Most auto technicians will not top off brake fluid for this reason. The fluid lasts as long as the breaks.
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.
Have you checked your brake fluid?
Brake fluid has to be 'bled' out through the valves on your calipers one at a time it is important to have either a vacuum pump for this job or an assistant to manually pump the brakes to force out the old fluid. Using new clean fluid to keep the brake resevoir 'topped' up during the process will prevent air bubbles from being allowed into the system.
look at the fluid reseviour.. if the fluid is low.. tis time to replace the brake pads.. as the pads wear out the fluid level drops
over time it will ..
have good supply of new correct brake fluid on hand easiest way to change fluid it to open bleeder valve on brake. fluid will run out die to gravity keep reservoir topped up till new fluid runs out of bleeder, tighten bleeder, make sure reservoir is at correct level, replace cap. do this to both wheels , one at a time . The answer above is a brief summary of how to do this but for a thorough explanation see the link below
Assuming you mean the color, not the ecological green, normal brake fluid for most US and Japanese cars is clear when new. Over time in the braking system, it can turn greenish and then red or brown as it ages. This is assuming it was not dyed at the factory. It is possible to purchase dyed brake fluid (ATE Super Blue) for performance/racing applications where the fluid is changed frequently. The idea is that each time you flush the fluid, you use a different color so that you see a change to the new color when all of the old fluid is out.
Check the brake fluid reservoir, it may be low on brake fluid indicating it is time to have the brakes inspected.