In general, it is legal to use a hidden car camera to record your mechanic, as long as you are not violating any laws regarding privacy. However, it is important to check your local laws and regulations, as some states or countries may have specific rules about recording conversations or capturing video footage without the knowledge and consent of all parties involved.
In most states it is not legal to secretly record conversations you are not part of. As tempting as it may be to spy on your mechanic while they repair your vehicle, it may not be legal.
Additionally, it is important to consider ethical concerns about using hidden cameras to record others without their knowledge or consent. If you have concerns about your mechanic’s trustworthiness or the quality of their work, it may be best to find a new mechanic rather than resorting to hidden surveillance.