At the very least, I think that they'd have to be a bit more specific than, 'contaminated', to void your warranty. You can't prove contamination by looking...unless you can see chunks of stuff. Colour means almost nothing.
Get them to analyse the fluid to prove/disprove contamination. They are accusing you of contaminating the brake fluid. Make them prove it.
While you're at it, get them to show you the procedure for changing out the booster. If they even had the cap off before they did the procedure, there is no way in the cosmos that they can prove they aren't the ones who introduced the contamination, should any contamination exist. They have already admitted they didn't notice any contamination until after the procedure.
Good luck.
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'00 Quad Cummins 4x4 Shortbox, Silver. From AZ to AB. Finally installed; Adrenaline (impressive) w/ Pulse (less so), Raptor, Dodge Steering Stabilizer, Luke's Link, Leer tonneau. Still to come; Mikuni MX-40 coolant heater, Tires...
Last edited by JoeCanuck : 08-01-2008 at 05:52 AM.