The Complete Vehicle Inspection Guide

Why the inspection sequence matters

A good inspection is methodical. Working through a vehicle in the same order every time means nothing is skipped because the car was interesting, or because the owner was talkative, or because the engine bay was so clean that the undercarriage seemed unlikely to be a problem. The sequence below is typical of a professional appraisal inspection. The order varies between appraisers; the coverage should not.

Every observation is photographed. The photographs are not decoration — they are the evidence behind each condition statement in the report, and they are what allows a third party to check the appraiser's work.

1. Identification and documentation

The inspection starts before anyone looks at paint.

• VIN and body tags. The vehicle identification number on the dash, door jamb, and (on older cars) the body, is compared with the title and registration. On collector vehicles, the appraiser also records body tags, trim tags, and cowl tags, which encode the original colour, trim, body style and sometimes the plant and build sequence.
• Engine and drivetrain identification. Casting numbers, date codes, and stampings on the engine block, cylinder heads, transmission, and rear axle are recorded. Whether they are consistent with the car's VIN and build date is the foundation of any numbers-matching claim.
• Odometer. The reading is recorded and compared with the title history and service records. Mechanical odometers on older cars may have rolled over or been replaced; the report states what can and cannot be verified.
• Paperwork. Title, registration, build sheet or window sticker, factory documentation, service records, restoration receipts and photographs, prior appraisals, and ownership history are reviewed and listed.

Identification problems found here change how the rest of the inspection is interpreted. A car presented as numbers-matching that is not is a different car from the one the owner described.

2. Exterior body and paint

The appraiser walks the car at a distance first, then up close, in good light.

• Panel alignment and gaps. Consistent gaps around doors, hood, and trunk indicate a car that is either straight from the factory or has been carefully repaired. Uneven gaps suggest collision repair, sagging hinges, or poor assembly.
• Paint. Colour match between panels, orange peel, runs, dust in the finish, overspray on trim and seals, and fading. A paint depth gauge is used on every panel; readings that jump from one panel to the next indicate refinishing or filler beneath the surface.
• Body filler and corrosion. A magnet or the depth gauge finds filler. Rust is checked in the places it starts: lower fenders, rocker panels, door bottoms, wheel arches, trunk floor, and around windscreen and rear-window seals.
• Originality of panels. On collector cars, whether fenders, doors, hood and trunk lid are original or replacements, and whether replacements are factory, reproduction, or fabricated.

3. Glass, brightwork, lights and trim

Glass is checked for chips, cracks, delamination, and date codes (original glass on a collector car carries manufacturer and date markings). Chrome and stainless trim is examined for pitting, dents, re-plating quality, and fit. Lenses, emblems, and badges are checked for correctness and condition. On a restored car, reproduction trim is noted; on an original car, worn original trim can be worth more than perfect reproduction.

4. Structure and undercarriage

This is where a clean car can stop being a clean car.

• Frame and unibody rails. Checked for kinks, crush damage, repair welds, and fresh undercoating that may be hiding repairs.
• Floors and inner structure. Floor pans, trunk floor, inner rockers, and torque boxes are checked for rust and patch repairs.
• Suspension and steering. Visible wear in bushings, ball joints, tie-rod ends, and shock absorbers. Leaking dampers, sagging springs.
• Brakes, lines, and fuel system. Line condition, leaks, and evidence of recent replacement.
• Exhaust. Condition, correctness, and leaks.

Ideally the car is on a lift. If it is not, the appraiser uses a creeper and a strong light and states in the report that the undercarriage inspection was limited.

5. Engine bay

• Cleanliness and detailing are noted but not mistaken for condition. A freshly detailed engine bay can hide leaks that will reappear after a drive.
• Leaks and seepage at the valve covers, oil pan, rear main seal, timing cover, water pump, and transmission.
• Hoses, belts, wiring. Condition, routing, and correctness. Modern wiring and aftermarket components in a car presented as original are recorded.
• Correctness. Carburettor or injection, intake, exhaust manifolds, air cleaner, ignition components, and ancillaries are compared with what the factory fitted. On a driver-grade car this is a note; on a concours-grade car it is a significant value factor.

6. Running condition and road test

The engine is started from cold where possible. The appraiser listens for knocks, taps, and exhaust note; watches for smoke on start-up and under load; checks oil pressure and temperature; and, where safe and permitted, drives the car. The road test assesses clutch and transmission behaviour, steering feel and play, brake performance and pull, suspension noise, and whether the car tracks straight. Mechanical findings go in the report; a diagnosis of their cause may require a separate mechanical inspection.

7. Interior

Seats, door panels, carpet, headliner, dashboard, and trim are checked for wear, tears, sun damage, and correctness. Gauges and switches are tested. The appraiser notes whether the interior is original, reupholstered in correct materials, or reupholstered in incorrect materials. Seat-belt date tags, radio, and climate-control equipment are checked against the build. Odours — damp, fuel, mice — are recorded because they indicate problems elsewhere.

8. Wheels, tyres, and stance

Wheel correctness and condition, tyre age (from the DOT date code), tread, and whether the tyres match. Stance — ride height and the car's attitude on its suspension — tells the appraiser about spring condition and whether the suspension has been altered.

From findings to a condition grade

Once the inspection is complete, the appraiser places the car on a recognised condition scale. The scales used in the collector market generally run from a concours-level car that is better than new, through excellent, good, fair, and poor, and the appraiser's report explains where the car sits and why. Mike's article on what determines a classic car's value, and his piece on muscle car values, both discuss how condition, originality and documentation interact.

The condition grade is not the valuation. It is the bridge between the inspection and the market analysis: once the appraiser knows what grade of car this is, comparable sales of the same model in the same grade can be found and adjusted for the differences that remain.

What a good report looks like

A thorough inspection produces a report that a stranger could follow. It identifies the vehicle precisely, lists what was examined and how, states the findings with photographs, explains the condition grade, sets out the comparable evidence, and arrives at a value with the reasoning visible. If something could not be examined — an engine that would not start, an undercarriage seen only from the ground — the report says so.

That transparency is what makes the appraisal useful to an insurer, a buyer, a court, or an heir. A number without an inspection behind it is an opinion. A number with one is evidence.