<div class=”bbp-reply-author”>wobbliscott
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The defender may very well have a crappy brake system that allows contamination more than other cars, but any garage worth their salt will have one of those things that measures the water content of the fluid and replaces the fluid when needed (can’t remember the name of them now). The garage I use does that and my average 10k or so a year motoring certainly doesn’t require the brake fluid to be changed every 2 years on any car i’ve ever owned.
Except that water is heavier that brake fluid, so ends up at the lowest point, causing
1, corrosion of the internals of the caliper and piston, leading to leaks.
2, the caliper gets hot, hotter than the boiling point of water, causing a very soggy brake pedal and reduced braking effort just when you really don’t want it!!!!