Took my car in for an oil change and new steering wheel pump. About $2,600.00. Fine. Within an hour of picking it up, huge electrical problems, rendering the car undriveable. "Not us," the dealer says. "Alternator went bad. We had nothing to do with it." Really? Within an hour of picking it up from your service station? Prior to that, zero indication of this problem. "Just coincidence," the dealer says. So, what now? "Now? Now it will cost you $1,600 to install a new alternator. But, tell you what, we'll cut you a deal and knock that down to $1,428.00 because we're good guys. You're welcome."
So, maybe it was coincidence. But maybe not. Would have been happy to split the difference.