brake fluid change - how often?

[E21_Ross]

usually, is it every 1 year or 2 years? i think it's every 2 years but it's been 1 year since it was last done and thought i'd better double check! i think it had dot 5.1 but can't 100% confirm, may have been 4.1 if that makes any difference?

thanks chaps.

[pk500]

every 2 years

[E21_Ross]

nice one, thanks mate.