About NextTest Auto

NextTest Auto is an evidence-first automotive diagnostic second opinion for people who know something is wrong but do not want to start replacing parts on a guess.

Upload a symptom description, photos, videos, sounds, scan-tool codes, or a repair estimate. We rank likely causes, identify the cheapest informative test to perform next, and explain urgency, difficulty, and potential repair costs without pretending the evidence says more than it does.

We are starting with older vehicles, DIY troubleshooting, and used-car checks because one correct test can prevent hundreds—or thousands—of dollars in unnecessary parts and repairs. The rule behind every report is simple: diagnose first, replace parts second.