The chassis number of a mobile home contains information that neither the registration document (non-existent for this type of property) nor the seller can always guarantee. Year of manufacture, model, manufacturer: everything starts from this sequence engraved on the chassis. When a campsite imposes a strict age limit, a discrepancy of one year between the announced date and the actual date is enough to block the installation on the targeted plot.
Decoding the format of a mobile home chassis number
The chassis number of a mobile home does not follow the 17-character VIN automotive standard. French manufacturers use their own identification systems, which complicates reading for an unsuspecting buyer.
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Since 2023, several manufacturers have directly marked the month and year of manufacture on the chassis, in a format like MM/AA or MM/AAAA. This code appears in addition to the classic serial number. On older models, the date is not directly readable: the number must be sent to the manufacturer to obtain the correspondence.
Before purchasing a second-hand mobile home, the first step is to check the chassis number on a mobile home and cross-reference this data with the manufacturer’s archives.
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| Number Format | Year Reading | Necessary Action |
|---|---|---|
| Code MM/AA or MM/AAAA engraved next to the serial number | Directly readable on the chassis | Check consistency with sales documents |
| Serial number only (older models) | Not readable without decoding | Contact the manufacturer with the full number |
| Identification plate missing or unreadable | No reading possible on-site | Request an inspection or contact the manufacturer with photos of the model |
Locating the identification plate according to the mobile home brand
The identification plate is not in the same location from one brand to another. Searching in the wrong place wastes time, especially when the mobile home is secured on a plot and access to the chassis is restricted.
On most models, the plate is located at the level of the drawbar (the front part of the chassis, intended for towing). Some manufacturers attach it under the leveling frame, thus under the mobile home itself. A flashlight and ramp access are sometimes necessary.
- Drawbar or towing bar: most frequent location, accessible from the front of the mobile home without moving it.
- Under the leveling frame: requires sliding under the structure. Ensure that the blocks are stable before any intervention.
- Inner face of the side beams: some brands attach the plate to the main beams of the chassis, visible by positioning oneself on the side.
If the plate has come off or the engraving is corroded, the serial number is often stamped directly into the steel of the chassis. This stamping withstands time better than the riveted plate.
Response from manufacturers and confirmation time
Manufacturers maintain very detailed internal databases on each mobile home produced. IRM, O’Hara, Louisiana, Rapidhome, or Trigano have technical services capable of finding the exact production date from the chassis number.
Several recent responses indicate that these services generally reply within a few days. Some even accept a simple description accompanied by photos of the model when the number is partially unreadable. The process is free in most cases.
What to prepare before contacting the manufacturer
A call or email to the technical service will be more effective with the following elements: the complete chassis number (or what remains), clear photos of the plate and the model, as well as the name of the campsite or original seller if you know it.
The manufacturer can confirm the year and month of manufacture, the exact model, and the original dimensions. This data also allows checking if any structural modifications have been made after leaving the factory.
Campsite age limit: why a one-year discrepancy changes everything
Many campsites impose a strict age limit, often set around fifteen years, calculated based on the actual year of manufacture of the mobile home. This rule conditions acceptance on a rental plot.
A seller who announces a year of commissioning (first installation at a campsite) instead of the year of manufacture can create a discrepancy of one or two years. This discrepancy may seem trivial, but it is enough to render a mobile home ineligible when it approaches the age limit imposed by the campsite manager.
On the other hand, a mobile home whose year of manufacture is confirmed by the manufacturer via the chassis number has a document that is enforceable. The campsite manager cannot contest a dating validated by the manufacturer.
Calling on an independent control organization
In case of persistent doubt or dispute over the actual year, it is possible to request an independent control organization like Bureau Veritas or Socotec. In the context of an inspection, these organizations can partially reconstruct the identification of the chassis and secure the dating.
This option is especially relevant for transactions between individuals where the seller provides no reliable proof, or insurance situations where the company requires proof of the property’s age.
Checking the chassis number remains the only reliable way to date a mobile home with certainty. On recent models, the MM/AA format engraved on the chassis simplifies reading. For older models, a simple contact with the manufacturer’s technical service is enough to obtain the exact date. This checkpoint takes a few minutes and can prevent a refusal of installation or a dispute after purchase.