Honest and reliable mechanics are just as common as honest anything else.
Dishonest ones are around too, just like dishonest plumbers, contractors, coating applicators or for that matter, inspectors.
The trick is finding them.
The most common way people find a new shop for their service work is through word of mouth; the recommendation of their friends.
This works pretty good in most cases.
So, if you are in need of a good, honest mechanic start out by asking your friends and associates if they know someone they can recommend.
Apart from that you should check with AAA of Texas or your state's AAA office or NAPA AutoCare for an approved shop in your area.
Once you have a name then check with the BBB to see what their record is like.
If they have unanswered complaints don't do business with them.
When you find a shop make it a habit of telling them everything you can about the car.
Holding back information only makes it harder for them to find the problem.
In other words, be honest with them too.
A couple of things to keep in mind...
an honest shop

• is usually busy and may not be able to get to you right away
• will charge somewhere between $80 and $100 per hours for repair work
• will make between 40 and 50% on parts
• will charge for diagnostic services
• will make mistakes, but
• will admit and correct their mistakes
• will provide a detailed estimate, a clear explanation and an itemized bill.