01

Set the static safety boundary

Record tyre pressure and markings, wheel condition, ride height, leaks, boots, bushes, joints, springs, dampers, mounts and accessible underbody points. Unsafe looseness, impact damage or fluid loss stops the road test.

02

Preserve four-corner and alignment evidence

Compare inner, centre and outer tyre wear with steering-wheel position and dated alignment measurements where justified. State whether the printout is before or after repair and retain the tyre condition beside it.

03

Run a conditioned road sequence

Use safe legal conditions for parking turns, low-speed uneven surfaces, steady speeds, light acceleration, lift-off and progressive braking. Record load, road surface, temperature, drive layout and regeneration setting.

04

Separate road-speed and torque symptoms

A sound that changes with road surface may follow tyres; one that changes with gentle steering load may involve several rotating components; one tied to torque may involve shafts or drive units. None should be diagnosed from sound alone.

05

Inspect connected systems

Check hubs, brakes, shafts, mounts, steering and suspension around the symptom. Accident repair, wheel damage or incorrect fitment can alter alignment and sensor calibration even when no warning is present.

06

Repeat after corrective work

Name the diagnosed cause, parts and workshop, then repeat the same route condition and alignment or calibration checks. A parts invoice without comparable behavior does not close the file.

07

Condition file close-out

Close this specific file by placing four-corner tyre and wheel record, steering and suspension inspection and alignment evidence where appropriate in one dated candidate record. The reviewer should be able to confirm that road test begins only after static safety approval and that symptoms are tied to speed, load and surface. Name the person or provider responsible for every unresolved point, add a realistic cost or consequence, and state what evidence will change the decision. If the VIN, version, condition or destination basis changes, reopen this file instead of carrying the previous conclusion into a different purchase.

08

Decision boundary

A useful decision records what is verified, what remains seller-stated and what was not tested. Attach a consequence and owner to each open item. Do not let a broad assurance replace a missing VIN record, charge test, condition image or destination opinion. Acceptance should be explicit: proceed, proceed with a priced condition, obtain more evidence, or reject. A replacement VIN never inherits an earlier acceptance.

09

Document discipline

Give images, scans, diagnostics and quotations a date, source and vehicle identity. Preserve originals before translation or editing. If custody, software, repair, route or candidate changes, identify which conclusions expire and repeat the affected checks instead of silently carrying them forward. Before inland release, read the same identity, propulsion, value and parties across contract, invoice, inspection and shipping drafts. Registration and customs remain separate destination checks.