This should serve as an incentive for people to seek out a reputable dealership. They are out there, but the bad ones seem to get all of the attention.
At one point along my bizarre career path I spent 4 years in the service departments of 2 different dealerships. Here are a few of the things that I saw first hand at these now-defunct dealerships:

If you spend an entire week rebuilding an automatic transmission and then fill it with motor oil it will work for about an hour.

It is possible to burn an entire wiring harness while installing a radio.

Sometimes the template in the sunroof box isn't the right one.

A speedy individual can "adjust" four odometers per hour.

A new car can have its trunk crushed to the tops of the wheel wells, can be repaired, and can be sold as new.

You can change 100 engine computers and fix nothing. Be sure to charge the customer for them anyway.

It is possible to drive from the shop out onto the lot before remembering that the engine has no oil in it.

An entire banana (peel and all), when stuffed into a noisy differential, will quiet it enough to get through a 30-day used car warranty.


Choose wisely.