Finding a car mechanic is like choosing any other small business. Look for quality, value and service.
Ask trusted friends for recommendations.
Talk to people who have cars similar to yours, if you are new to an area.
Make sure the mechanic you've chosen services your type of car. Look around the shop and see what kinds of cars are being worked on.
Call the Better Business Bureau to check whether the shop has any complaints on file.
Check whether the shop is accredited by the Canadian Automobile Association (CAA).
Ask whether the shop's auto mechanics are certified by accredited industry bodies.
Check the warranty on the repair work before leaving the car at the shop. Six months is great; 90 days is good; 30 days is a little suspect. Find out whether the warranty covers both parts and labor.
Ask for a full explanation of what is going to be done to the car.
Find out what the shop's hours are. Will it be open when you get off work? Is the shop near the bus or train? Will you get a loaner while your car is being worked on?
To any business that isn't playing fair, an educated customer is a scary customer. Before going into any automotive service business you should arm yourself with knowledge about every facet of the interaction you will be experiencing. Please take the time to visit and the many information pages on this website, especially the shop scams page.