The Montero Maintenance Saga Continues...

Well after getting my Montero back from a $2000+ service everything seemed fine. But a few days ago I noticed a weird metal grinding noise. Hmmm, well I thought it was just some sort of break in. Well today, it happened again and continuously...WTF!!! I just got it back from service. So I go back to the shop that serviced my truck and come to find out that it is the accumulator...? According to the mechanic its a high pressure, nitrogen filled cylinder that assists the braking system. Huh, well it was fine before I brought it in. But he says that they do wear out and that it's an $80 part with $25 labor to install. Great, so the maintenance continues. Still need to replace shocks/struts and tires plus an alignment...ugh...I should've just bought a new car!