First of all, what do you mean by "stopped working"? If it's just the power assist that quit and you have to push really hard on the brake pedal, only the booster needs to be replaced. Failure of those is very rare on any brand of vehicle.
Second, you're comparing the cost of hamburger in a grocery store to its cost in a restaurant. The shop had better mark the cost up and make a profit on it just like any other store. That is what covers the cost of getting it delivered or picked up, and it partially helps offset the cost of doing the job over a second time when new parts are defective. The shop has no intentions on trying to make you pay for the repair a second time if the new part is defective but the mechanic didn't do anything wrong and he deserves to be paid for his time when he could have moved on to the next car. That's why most shops frown on installing parts customers bring in, just like you don't take your food to a restaurant and ask them to cook it for you. If you supply a defective part you will be expected to pay the second bill for the second repair.
$110.00 seems a little high for a master cylinder but it's kind of low for a booster. I guess I'd want to know their reason for wanting to replace the master cylinder but I'd want to know the symptom too.
Thursday, May 23rd, 2013 AT 9:44 AM