GearVerify Auto
Free US tools to help used-car buyers and vehicle owners check practical risks before buying, repairing, modifying, towing, or driving.
Auto Verification Tools
VIN Decoder
Decode a VIN to get make, model, year, vehicle type, and engine details from NHTSA data.
Open →Vehicle Recall Checker
Check if a vehicle has open recalls by VIN or year/make/model using NHTSA data.
Open →OBD-II Code Lookup
Look up a check engine light code (P0, B0, C0, U0) to understand what it means and what to do.
Open →Tire Size Calculator
Calculate tire dimensions from a size like 225/65R17. Shows sidewall, diameter, and circumference.
Open →Tire Size Comparison
Compare old and new tire sizes to check speedometer error and clearance changes.
Open →Speedometer Error Calculator
Calculate actual speed based on tire size change vs stock diameter.
Open →Wheel Offset Calculator
Calculate clearance changes when switching to different wheel width or offset.
Open →Towing Capacity Calculator
Estimate towing and payload margins based on user-entered vehicle ratings and trailer weights.
Open →Used Car Inspection Checklist
Printable checklist for inspecting a used car before buying. Covers documents, exterior, interior, engine, test drive, and OBD scan.
Open →Why Verify a Used Car?
Buying a used car without checking can lead to unexpected repair costs, safety risks from unfixed recalls, or compatibility issues with tires or towing. GearVerify Auto tools help you check public data before you spend money.
Disclaimer: GearVerify uses public data and user-entered information to highlight possible risks. It does not replace a mechanic inspection, professional diagnosis, or official vehicle history report. A no-match result does not guarantee a vehicle is safe.