Buying a used car: checklist before signing

Buying a used car requires a minimum of preparation to limit bad surprises. Here is a practical checklist before signing: documents, test drive and points to check.

Documents to check

Check the registration document (vehicle identity, owner), the certificate of no outstanding finance (vehicle not under finance) and if possible the service history (logbook, invoices). An up-to-date (or recent) MOT / roadworthiness test is essential: it certifies that the vehicle meets minimum standards. For a private sale, insist on an invoice or dated, signed written proof of purchase.

Test drive

Drive the vehicle on the road and if possible on the motorway. Check braking (effectiveness, stability), steering (no play, no pulling), gear changes (smooth, no crunching). Listen for noises (engine, suspension, wheels). Check that dashboard warning lights go out after starting (except those that are meant to stay on). A cold then warm test helps detect behaviour differences.

Visual checks

Bodywork: rust, repairs, alignment of doors and bonnet. Tyres: wear, age (DOT code), pressure. Fluids: oil level, coolant, brake fluid. Under the bonnet: leaks, damaged cables or hoses. Interior: wear on steering wheel and gear lever (consistent mileage), seat condition.

Hidden costs and diagnosis

Allow for a post-purchase service budget (filters, fluids, pads if close to wear limit). An electronic diagnostic (fault code read) or pre-purchase inspection by a professional can reveal non-visible faults. My Auto Check-up helps you estimate possible repair costs from symptoms or vehicle history.