Sonic Drive - In # 3966 is a restaurant located at 1637 Wells Branch Pkwy Austin, 78728-7008 in Austin, Texas (78728-7008). The facility has undergone 7 health inspections by the Travis County Health Department, maintaining an average score of 91/100. The most recent inspection on January 12, 2026 resulted in a score of 90/100, classified as excellent.

Health inspections are conducted by Travis County Health & Human Services to ensure restaurants maintain proper food safety standards. Scores are based on compliance with Texas Food Establishment Rules (TFER) and assess factors including food temperature control, employee hygiene, facility cleanliness, and pest control. Regular inspections help protect public health by identifying and correcting violations before they can cause foodborne illness.