Front brake

[Bryanj]

As long as it is capped its fine

[bobv7]

Makes a change to have some good news. Thanks for that and the cap is well screwed on.

[Seabeowner]

As part of servicing lots of car manufacturers specify changing the fluid every two, three or four years. A real money spinner for garages.

[Bryanj]

It is a good idea to change every few years as in a car with vent holes in the master ot does absorb water then if you need to brake a lot the fluid gets hot enough for the water to boil off causing vapour lock and lost brakes

[McCabe-Thiele (Ted)]

Unless you can guarantee to get every last tiny bit of old fluid out dont use dot5.

That's why I am a big fan of dot 5.1 it's not overly expensive with lower hygroscopic spec plus it mixes with everything except dot 5.0.