How to Check a Used Car’s Version and Trim Level
Before comparing prices or travelling to view a car, confirm what vehicle it actually is. This guide explains what each document proves, how to cross-check the details and which warning signs should stop you from buying.

Key points
To check a used car, review its ITV card and request a DGT report using its registration number. The VIN identifies the vehicle and must be physically checked; the listing title, badges or photos alone do not prove the trim level or optional equipment.
The short answer: identify the individual vehicle, not its commercial name
The most reliable way to check an advertised car is to review its ITV card, registration certificate and the administrative information available for that individual vehicle. Only then does it make sense to compare the seller’s commercial description — model, engine and trim — with the available documentation.
The year of first registration does not by itself establish the model year, generation, power output or equipment level.
Before booking a viewing, ask for the registration number and a readable image of the ITV card and registration certificate. Ask for personal details that are not needed to verify the car to be redacted. If the seller cannot provide consistent documentation, postpone any deposit, finance, insurance or travel arrangements.
Section references: Comprar un vehículo de segunda mano ↗ · Orden ICT/1212/2018: tarjetas ITV y homologación ↗
- Check that the registration number, make and available details do not contradict one another.
- Separate three questions: which vehicle it is, which documented specifications it has and which factory options are recorded.
- Treat the listing description as a starting point, not as documentary certification.

ITV card: the basis for checking the documented configuration
The ITV card describes a specific vehicle and must record only the specifications that correspond to the documented vehicle. It is therefore the key document for checking the documented specifications stated in a listing. Review the entire document, not just a partial image of its front page.
It lets you check the make and the type, variant and version identification, which are codes used to identify the vehicle in the approval documentation. If the listing does not match the documented information, ask for a documented explanation.
The card may include optional equipment fitted by the manufacturer when it is covered by the type approval. In addition, certain factory configurations, such as an LPG or CNG installation, a towing device, an adaptation for driving-school use or for reduced mobility, must be recorded as options included in the type approval. This can reveal relevant items that the listing has omitted or described imprecisely.
There is a limit to this reading: the fact that an item is not expressly listed does not automatically mean it never existed as an option. The cited documentation does not by itself prove the commercial trim, packages or details of every extra.
Section references: Orden ICT/1212/2018: tarjetas ITV y homologación ↗
- Compare the type, variant and version, not just the name written in the listing.
- Check the documented specifications before comparing two vehicles.
- Look for references to relevant factory options, especially LPG/CNG, a towbar and adaptations.
- Do not confuse an accessory visible in photos with an option recorded in the type approval.

VIN: the identifier that must be physically checked
The VIN is the vehicle identification number. The ITV station inspection procedure manual defines it as a 17-character field. Regulations require the vehicle to carry that identification number engraved, stamped or permanently marked on the chassis or monocoque structure, as well as a manufacturer’s plate.
During the viewing, physically check the VIN on the vehicle. A photo of the windscreen, a label or an isolated plate is not enough: inspect the identification number engraved, stamped or permanently marked on the chassis or monocoque structure.
A noticeable alteration to the identification number, plates or regulatory inscriptions is not a minor detail. Stop the transaction until it is documented and clarified. Regulations prohibit changes or alterations to chassis identification numbers, plates and regulatory inscriptions. Avoid publicly sharing full images of documents.
Section references: Real Decreto 2822/1998: Reglamento General de Vehículos ↗ · Manual de procedimiento de inspección de las estaciones ITV, versión 7.9 ↗
- The VIN is the vehicle identification number and has 17 characters.
- Physically check the VIN engraved, stamped or permanently marked on the vehicle.
- Do not normalise numbers or letters that “look” similar: check every character.
- If there is an alteration or doubt, do not proceed with the purchase until you have a verifiable explanation.
Registration certificate and DGT report: administrative cross-check and history
The registration certificate adds a documentary reference for checking the date of first registration. The ITV manual states that the year of first registration can be obtained from the General Vehicle Register, the registration certificate or the ITV card. Use it to check that the advertised date matches, but not to infer the trim, generation or exact engine on its own.
The DGT allows you to request a report using the registration number. Before buying, it recommends the reduced report to confirm the vehicle has been correctly identified, check that it is registered as active and find out about incidents, encumbrances or restrictions that may affect the car.
When you need to look further, the full report includes administrative information, ownership, ITV history, mileage, encumbrances, technical data, outstanding campaigns and available maintenance information. There is also a technical data report with power output, fuel, maximum masses and ITV history. These are useful sources for checking the listing information and history, but they do not by themselves turn a commercial trim description into certification of all optional equipment.
Section references: Informe de un vehículo ↗ · Comprar un vehículo de segunda mano ↗ · Manual de procedimiento de inspección de las estaciones ITV, versión 7.9 ↗
- Request the reduced report as an initial check of identification, active registration and incidents.
- If there are doubts about mileage, technical details or ITV history, consider the full report or technical data report.
- Compare the power output, fuel and maximum masses in the technical data report with the listing.
- Distinguish administrative data from the commercial equipment level.
Trim and optional equipment: do not infer them from badges or photos
The trim level is not proven by administrative documentation alone. Do not use badges, wheels, upholstery, screens, accessories or photos as the sole proof of the original configuration.
The ITV card may include optional equipment fitted by the manufacturer when it is included in the type approval. Factory configurations involving LPG or CNG, a towing device and certain adaptations must be recorded as options included in that approval. Outside these documented cases, the documentation reviewed does not make it possible to certify the commercial trim or every extra on a specific vehicle.
Pay particular attention to items that change usability or cost, such as LPG or CNG systems, a towbar and adaptations. If a feature is decisive to your purchase, require specific evidence before agreeing the price. You can complete this review with the used-car checklist.
Section references: Orden ICT/1212/2018: tarjetas ITV y homologación ↗
- Do not treat an advertised trim as confirmed information without supporting documentation.
- Look on the ITV card for factory options included in the type approval.
- Treat any decisive optional item that appears only in photos as unproven.
- Separate later accessories from factory options recorded in the documentation.
Checking table and decision before making an offer
Carry out the checks in this order: first review the identification and available documentation; then verify the technical data and administrative status; finally, check the factory options recorded on the ITV card. This will prevent you from basing your decision on an insufficient description.
The clearest warning sign is any discrepancy between the listing information and the available documentation. You should also stop when extras are presented as standard equipment without proof. In those cases, ask for additional documents and do not complete the transaction until you can describe the vehicle accurately.
| Document or source | What it lets you check | Common mistake | Useful question for the seller |
|---|---|---|---|
| ITV card | Documented vehicle, type, variant, version and factory options included in the type approval | Treating the entire commercial trim as proven by the card alone | Can you send the complete, readable card? |
| VIN and its physical marking | Vehicle identification number and its physical marking | Accepting a partial photo or not checking the physical marking | Where can it be checked on the car? |
| Registration certificate | Date of first registration | Inferring generation or trim from the registration date | Does the date match the ITV card? |
| DGT report | Identification, active registration, incidents; in extended reports, technical data, ITV, mileage, encumbrances and other available details | Treating it as proof of all optional equipment | Are there incidents, encumbrances or differences from the listing? |
| ITV card and options included in the type approval | Certain factory options, such as LPG/CNG, a towbar and certain adaptations | Treating extras that are not recorded as included options as proven | Is this factory option recorded on the ITV card? |
Section references: Informe de un vehículo ↗ · Comprar un vehículo de segunda mano ↗ · Orden ICT/1212/2018: tarjetas ITV y homologación ↗
- Before making an offer: readable ITV card, registration certificate checked and DGT report reviewed.
- Before paying a deposit: power output, fuel and maximum masses checked against the DGT technical data report.
- Before closing the deal: relevant factory options checked on the ITV card where they are recorded in the type approval.
- If an unresolved contradiction remains, consider the listing information insufficient.
Is the registration number enough to know a car’s exact version?
No. You can use the registration number to request a DGT report and check available administrative and technical information. The ITV card documents a specific vehicle and identifies its type, variant and version. The trim and all optional equipment are not proven by those details alone.
Can I identify the trim from the registration year?
Not reliably. The date of first registration may appear in the General Vehicle Register, the registration certificate or the ITV card, but it does not by itself certify the generation, engine, trim or equipment packages.
What should I do if the power output in the listing does not match the available information?
Do not accept either figure without clarification. Ask for the complete ITV card and request the DGT technical data report or full report. If the difference still has no documented explanation, do not complete the purchase.
Is an extra visible in photos guaranteed to be factory equipment?
No. Photos do not by themselves prove factory equipment. The ITV card may include optional equipment fitted by the manufacturer when it is included in the type approval; for a decisive extra, ask for specific evidence.


