Scammers who do the lowest effort diagnostic and "fix" to get you to pay a smaller amount of money to fix the problem in the short term even though it'll re-present itself a week/month/year later.
Upsellers who will find other things "wrong" with your car and pressure you into paying to fix them because they sound a lot worse than they are.
Good mechanics that will explain what they did to diagnose the issue and recommend different options depending on what the issue is.
Funnily enough, I've found that doctors tend to also fit into these 3 archetypes.
Scammers who do the lowest effort diagnostic and "fix" to get you to pay a smaller amount of money to fix the problem in the short term even though it'll re-present itself a week/month/year later.
Upsellers who will find other things "wrong" with your car and pressure you into paying to fix them because they sound a lot worse than they are.
Good mechanics that will explain what they did to diagnose the issue and recommend different options depending on what the issue is.
Funnily enough, I've found that doctors tend to also fit into these 3 archetypes.