DIRECT ANSWER
Make the decision from one identified vehicle.
Electrified vehicles are quiet, not silent. A symptom can follow road speed, motor speed, torque, engine entry, regeneration or surface. Identify DM-i or EV, record the exact state and change one condition at a time before assigning a component.
Keep the market context attached to every claim. Production date, propulsion, configuration and destination can change what an advertised number means. Mark facts as verified, seller-stated or still open; official model literature never proves the equipment or condition of a particular used vehicle.
CONNECTED DECISIONS
Use the evidence in its wider route
- Separate rolling noise through the tyre, wheel and alignment guide.
- Map the symptom beside the brakes and regeneration road test.
- Keep diagnosis inside the complete candidate inspection.
EVIDENCE FILE
Records that change the answer
Start with VIN-linked powertrain configuration and link it to the VIN before accepting translated trim names or catalogue photographs. Add tyre, wheel, brake and bearing inspection so condition or equipment claims can be checked against the actual car. The remaining records establish how the vehicle operates, how it has been treated and whether the proposed route is credible.
- VIN-linked powertrain configuration
- tyre, wheel, brake and bearing inspection
- conditioned symptom map with route and mode
- pre- and post-drive diagnostics
- repair scope and comparable retest
Give each record a capture date and a defined scope. Diagnostics taken before repair, charging evidence from another car or freight priced to a different port cannot support the present decision. A replacement VIN starts a new evidence chain rather than inheriting the first candidate's file.
DECISION TEST
Test the route, not the brochure
A low-speed test is quiet, but a steady-road segment reveals a tone that changes with surface rather than accelerator position. Compare tyres and hubs before naming the drive unit. On DM-i, repeat engine-off and engine-on states only where the vehicle normally permits so EHS or engine entry is not confused with wheel-speed noise.
Prefer the vehicle whose identity and operating limits can be demonstrated with current records. Put a cost or condition beside each unresolved item instead of concealing it in a general assurance.
Inspection scope should follow the decision. For this route, check establish a static noise and safety baseline, then separate road-speed, torque and hybrid-transition events. Continue with inspect tyres, hubs, shafts, mounts and accessible housings and record preserve diagnostics and repeat the same route after repair. Measurements, photographs, diagnostics and test conditions are more transferable than labels such as “excellent,” “full option” or “export ready.”
Risk boundary
Calling every whine normal can hide a bearing, gear, mount or tyre fault, while calling every high-frequency sound a failed motor can create needless replacement cost. A phone recording without speed, load and route context is weak evidence.
A known shortcoming can be accepted when its consequence, remedy and price are visible. An untested claim is different: keep it open in the quotation and link payment timing to the check that can close it.
DESTINATION CONTROL
Carry the same facts through export
Carry the symptom conditions, diagnosis, work and retest with the VIN. Price destination expertise for the exact motor, EHS or reduction hardware and record unresolved noise before custody changes.
Before collection, read vehicle identity, propulsion, value and trading parties across the commercial and shipping drafts. Destination acceptance and carrier acceptance must both be checked; customs release alone is not proof that road registration will follow.
State where the cost calculation ends and when it was prepared. Include vehicle preparation, inland logistics, freight, insurance, duties, taxes, compliance, storage, destination transport and initial service as applicable, while keeping unconfirmed charges visibly contingent.
BUYER QUESTIONS
Questions to settle before payment
Does electric-drive whine always indicate failure?
No. Record speed, load, temperature and comparison evidence before diagnosis.
Can a cabin recording identify a wheel bearing?
No. Combine controlled observations with physical inspection.
What closes a vibration complaint?
A named cause, accepted work and comparable repeat test.
PRIMARY REFERENCES
Verify the current market version
BYD lists the current China-market vehicle through separate official Sealion 06 EV and Sealion 06 DM-i pages. Official pages describe the model family; the candidate still needs VIN-linked verification, and destination rules require separate confirmation.