Got message on dash to Replace the Brake Fluid! Do i must do it?

[bosanci28]

Originally Posted by MAK3N3

Get a Motive Pressure Bleeder and a catch/drain bottle, don't even have to remove the wheels or at least I didn't on my E70...wait I think I removed the rears only but still the entire process was 45mins taking my time.

Thanks for that advice!
Now that tool there you tight the round cap to brake tank and on the other side put air pressure to push out the brake fluid? and normally need to open at 1 wheel? or must do to all wheels?
Thanks.