PartsNow.ai is an AI-powered parts identification and diagnostic platform designed for heavy-duty trucks and trailers. The core tool is an AI assistant named Mike, which functions as a free specialist to help users identify mechanical issues and locate the correct replacement parts. The platform is accessible via a web chat interface, phone calls, and text messages, and does not require an account or sign up to use. The primary features include natural language problem description, where users can explain a symptom in plain terms without needing the correct technical name or part number. Users can also submit a photo of the damaged part or provide a Vehicle Identification Number (VIN) to assist with identification. Mike operates 24/7 and supports both English and Spanish. The platform maintains a knowledge base covering U.S. commercial trucks from Class 3 to Class 8, including specifications, engine data, and vehicle history. When a part is identified, Mike can source it from the PartsNow.ai catalogue, which contains over 50,000 new and OEM parts, and arrange for shipping or local pickup in Knoxville, Tennessee. Typical use cases involve a user whose truck has a new noise, a warning light, or a visible leak. The workflow begins with the user describing the issue, optionally adding a photo or VIN. Mike may ask a few clarifying questions, then provides a diagnosis, suggests what to check first, and offers part options including a budget alternative. The user can then choose to order the part or leave without any obligation. The platform is also used by those who have an old part with no visible part number, needing reverse identification, or by drivers facing a breakdown outside of regular business hours. No technical requirements beyond a phone or internet connection are needed to access the service.