Understand the billing process at the auto repair shop you go to.
In many cases, you could get a bill for labor based on how long the manufacturer thinks it will take to repair your car. https://wikimapia.org/external_link?url=https://auto-works.cc/%D8%A7%D9%88%D8%B3%D8%AA%D9%88%D9%86-%D8%A7%D9%88%D8%B3%D8%AA%D9%88%D9%86-295-80-22-5-295-80-22-5