Question How often should you have your vehicle inspected? Answers Once every four years Once every three years Once every two years Once every year Explanation All motor vehicles bearing a Maine registration must be properly inspected before being operated on any public roadway. These inspections must be done at an official inspection station once a year. Pass your DMV Written Test with flying colors Take me to the cheat sheet Maine This questions appears in the following tests: Maine Practice Test 8 Maine Practice Test 17