
To change the vehicle frame number, the vehicle owner or their agent must submit the following documents and present the vehicle for inspection within ten days after the change: "Application Form for Vehicle Modification/Registration", the original identity proof of the vehicle owner, the vehicle registration certificate, the vehicle license, and the vehicle inspection record form. If the process is handled by an agent, the original and a copy of the agent's identity proof must also be submitted, along with the original and a copy of the handler's identity proof, and a written authorization from the vehicle owner. The vehicle office should, within one day of acceptance, verify the vehicle, review the submitted proofs and certificates, annotate the modification on the vehicle registration certificate, reclaim the vehicle license, and reissue a new vehicle license. For the modification registration items specified in Article 10, Paragraph 1, Items (3), (4), and (6) of these regulations, the vehicle management office must verify the vehicle identification number imprint. Article 16 of the "Road Traffic Safety Law of the People's Republic of China" prohibits any unit or individual from engaging in the following activities: Assembling a motor vehicle or altering the registered structure, construction, or characteristics of a motor vehicle without authorization. Changing the model number, engine number, frame number, or vehicle identification number of a motor vehicle. Forging, altering, or using forged or altered motor vehicle registration certificates, license plates, vehicle licenses, inspection qualification marks, or insurance marks. Using the registration certificate, license plate, vehicle license, inspection qualification mark, or insurance mark of another motor vehicle.

Last time I helped a friend with the vehicle frame number change procedure, and it was indeed quite cumbersome. First, you need to bring your ID card, vehicle license, and registration certificate to the local DMV where the vehicle is registered to fill out an application form. The staff will verify your legitimate reasons for the change, such as accident reports or body repair invoices. The vehicle inspection is the strictest part—they use specialized tools to imprint the new stamped number and take new photos of the entire vehicle. It's advisable to remove any exterior modifications beforehand, or they might ask you to dismantle them. Finally, when the archives office reissues the vehicle license, you'll need to sign again at the counter for confirmation. The whole process took three trips—remember to avoid peak periods like Mondays or month-end.

Changing the vehicle frame number must follow the official procedure. First, bring the original owner's ID card, vehicle registration certificate, and accident repair list to the DMV to file a report and register. Important reminder: when the repair shop cuts the old frame, they must retain an 8-centimeter section with the original number according to national standards, and the newly welded frame must meet the original factory specifications. During the inspection, even the gaps in the chassis will be checked—once, someone was asked to rewash their car because of mud on the chassis. On the day of replacing the new vehicle license, it's best to go early, as system upgrades can easily get stuck during the certificate-making process. Handle the entire process legally and compliantly, and never use scalpers for fake procedures.

As someone who just completed the modification process, here are a few key reminders: 1. Prepare the traffic police accident report or scrapping certificate. 2. The repair shop must issue a replacement certificate. 3. Settle all traffic violations in advance. 4. Allocate at least half a day for queuing at the DMV. Pay special attention to ensuring the new chassis stamp position matches the original factory specifications exactly – last time, the inspector measured three reference points with vernier calipers. Payment at the counter is by card only; cash is no longer accepted. Mailing for the new certificate is faster than on-site collection, with a total cost of under 200 yuan (45 yuan for the certificate fee plus 110 yuan for the plate fee).

Be extremely cautious, as altering the vehicle identification number (VIN) involves the identity of the car. In addition to the standard registration certificate, ID card, and repair certification, vehicles involved in major accidents must also submit a technical inspection report. During the inspection, officials will meticulously check the stamped markings in four key locations: the windshield area, under the passenger-side door sill, the engine compartment, and the rear chassis crossbeam. If the vehicle body has severe rust, anti-corrosion treatment must be completed first. The entire process must be handled by the vehicle owner in person. Last year, someone was caught by police on the spot for using a fake power of attorney, resulting in the vehicle being impounded for three months, followed by a mandatory statement at the traffic police legal department.

Old Li, my neighbor, shared his experience of changing the vehicle frame after his truck was rear-ended last year. He mentioned that the first step is to find a qualified repair shop to provide a detailed repair list with an official seal. Then, take the accident certificate to the vehicle inspection station at the DMV to get an inspection form. The technique of the master craftsman is crucial when re-stamping the VIN—too shallow and it won't pass the inspection machine, too deep and it might puncture the frame. Finally, when archiving, make sure the modification record on the third page of the registration certificate matches the new stamped number. He also suggested doing a vehicle record check at the same time, as system updates take 7 working days, during which long-distance trips should be avoided.


