To avoid mechanic scams, consider requesting video evidence of the issue, as shops increasingly use video to verify inspections and repairs directly from your vehicle. Additionally, always ask for a detailed written estimate that includes parts and labor costs, ensuring the shop doesn't exceed 10% of the estimated cost without your approval. Engage with technicians by asking questions about the repairs, such as brake pad thickness or whether a repair is urgent. A trustworthy mechanic should provide clear answers and visual proof if needed. If a shop refuses to explain or demonstrate issues, it may indicate dishonest practices, warranting a change to a more transparent service provider.