I'm unsure of your area and safety inspection criteria , but I always recommenend an annual safety inspection . The same one you needed to purchase plates for your vehicle . In my area (ONTARIO) a safety inspection is roughly $50 . This will help give annual piece of mind for safety sake . As for noise complaints it could be a variety of things so ask the technichian for reccomendations this
should be free as they are hoping to sell you parts\labour and gain a regular customer .
GOOD LUCK :