Index
Why the description determines whether they call or not
What information a description must always include
How to structure the description so it's easy to read
Extras: how to present them so they add value
History and maintenance: the most differentiating argument
Terms of sale: what the buyer needs to know before calling
What not to put in a description
Example of a complete description
AI as a tool to scale quality
Frequently asked questions
Why the description determines whether they call or not
The used car buyer reaches the listing having already seen the photos in the thumbnail. If they liked the photos enough to click, what decides whether they get in touch or keep looking is the description. At that moment they have a specific question in mind: "is it worth calling, or will there be something that doesn't add up?"
A complete description that answers that question before it's asked converts better. Not because it's longer, but because it removes the uncertainty that holds back contact. The buyer who has read that the car has its ITV until 2027, new tyres, services at an official dealer workshop and that the transfer is included in the price has much less to ask. And the less they have to ask, the more likely they are to call.
See also how to improve ad performance on the main portals.
The opposite effect is also real: a description with little information doesn't build trust, it breeds suspicion. The buyer who doesn't find the minimum information in the description assumes there's something to hide, even when there isn't.
What information a description must always include
There are five blocks of information that must never be missing from any professional used car description.
The first is the exact identification of the vehicle: make, model, version or trim, year of registration, fuel and power. "BMW 320d" isn't enough: you need to specify whether it's the Sport, the M Sport or the Business, because those trims have different equipment and market prices.
The second is the mechanical and maintenance condition: real mileage, service history (whether at an official dealer workshop or an independent garage), condition of the most relevant wear parts (tyres, brakes, clutch if manual), valid ITV with the date of the next inspection and any recent repair that adds value.
The third is the equipment and extras. Not all extras have the same value for the buyer, but the most common ones that generate interest are: touchscreen with its size, rear camera, parking sensors, dual-zone or tri-zone climate control, sunroof or panoramic roof, heated seats, alloy wheels with their size, built-in navigation system and driver assistance systems.
The fourth is the documentation status: whether the car has had one owner or several, whether it comes from a fleet or leasing (which implies documented maintenance), whether the service book is available and whether it has any active encumbrance or retention of title that the buyer should know about.
The fifth is the terms of sale: whether it includes a warranty (how many months and what it covers), whether the price includes the transfer, whether a car is accepted as part-exchange, whether financing is available and whether the car is delivered serviced.
See also how to structure the stock photography process in a dealership.
How to structure the description so it's easy to read
A description that is a continuous 300-word block of text with no structure reads worse than one that clearly separates the blocks of information. The buyer who scans the listing (which is how most people read on a portal) has to be able to find the information they're looking for in seconds.
The most effective structure for a used car description is: an opening sentence that sums up the car's main value, the technical data in a compact block, the condition and maintenance in a paragraph, the relevant extras in a list, and the terms of sale in the final paragraph.
The opening sentence is the most important and the most neglected. "Car in perfect condition" isn't an introduction: it's a statement with no content. An introduction that works says something concrete: "Single-owner vehicle, serviced at an official dealer workshop with all services up to date and a recent ITV. No declared accidents." In two lines, the buyer already knows the most important things.
Extras: how to present them so they add value
A car's list of extras has more value when it comes with a brief explanation of why that extra is relevant to the buyer, not when it's simply a list.
"10.25-inch touchscreen with Apple CarPlay and Android Auto" says more than "touchscreen". "Dual-zone climate control" says more than "climate control". "Electric sunroof" says more than "sunroof".
For cars with mid- or high-level equipment, a sentence that sums up the value of the package has more impact than a long list: "The M Sport trim adds full LED headlights, a sports bumper, leather upholstery with blue stitching and specific 18-inch wheels, giving it a significantly different look from the standard 320d."
That sentence doesn't just inform: it also answers the buyer's implicit question ("why does this car cost 2,000 euros more than that one?").
History and maintenance: the most differentiating argument
With the same price and model, the buyer who has to choose between a car with a documented history and one without chooses the first. History removes the main source of uncertainty when buying a used car: not knowing what happened to that car before.
Documenting the history in the description doesn't take much space but has a real impact on conversion. "Serviced at an official BMW workshop with a stamped maintenance book up to the current 87,000 km" says more than "well maintained". "From a company lease with a full-service maintenance contract, no dents or repaired bodywork" says more than "company car in good condition".
If the car has no documented history, it's better to be honest about it than to try to hide it: "The car has no service book, but it is delivered with a full workshop service carried out before the sale, with the report attached." Transparency builds more trust than silence.
Read also how to buy stock from leasing companies and corporate fleets.
Terms of sale: what the buyer needs to know before calling
The terms of sale are the block most often left out of descriptions and the one that generates the most questions when it's missing. A buyer who has to call to find out whether the price includes the transfer, whether there's a warranty or whether it can be financed has had to make an extra effort, which reduces the likelihood that they complete the deal.
Publish on every portal automatically with Dealcar. More information at dealcar.io/stock-coches-multipublicacion.
The minimum conditions that should be in the description are: whether or not the price includes the transfer (in Spain this is a point that causes a lot of confusion and is worth clarifying), whether a warranty is available and for how many months, whether a vehicle is accepted as part-exchange and whether financing is available with or without a down payment.
A final sentence summarising the conditions closes the description effectively: "Price excludes transfer. 12-month warranty available. Financing with no down payment. We accept your car as part-exchange."
See also whether it pays off to take out a mechanical warranty at a used car dealership.
What not to put in a description
There are elements that frequently appear in car descriptions and have the opposite effect to the one intended.
Unsupported claims breed mistrust: "immaculate", "as new", "perfect condition" are words the buyer has read in so many listings for cars with problems that they have lost all their informative value. If the car is in good condition, saying exactly why it's in good condition is more convincing than claiming it.
False urgency doesn't work either: "offer this week only" or "price negotiable today only" on a listing that has been up for weeks are signs of desperation that an experienced buyer spots.
Spelling mistakes and grammatical errors don't just make reading harder: they also convey little attention to detail, which raises doubts about whether the car has received the same level of care.
Example of a complete description
SEAT León FR 2.0 TDI 150 hp DSG — 2019 — 87,000 km
Single-owner vehicle (company), from leasing with full-service maintenance at the official SEAT network. No accidents or bodywork repairs. Stamped service book available.
Engine: 2.0 TDI 150 hp. 7-speed DSG automatic gearbox. Average consumption: 4.6 l/100 km. Environmental label C.
Extras: 18" FR alloy wheels, full LED headlights, 9.2" touchscreen with Apple CarPlay and Android Auto, rear camera, front and rear parking sensors, dual-zone climate control, sports seats with red stitching, keyless start.
ITV passed in January 2026 (valid until January 2028). Tyres with 80% of their service life remaining.
Delivered serviced. Price includes transfer. 12-month warranty available. Financing with no down payment. Car accepted as part-exchange.
AI as a tool to scale quality
For a dealership that publishes 15 or 20 cars a month, writing a complete, quality description for each one can take between 2 and 3 hours a month. AI tools generate those descriptions from the vehicle data in seconds, with a level of quality good enough to publish with minimal review.
Dealcar includes an AI agent that automatically generates the vehicle description from the data entered in the listing: make, model, version, mileage, extras and terms of sale. The salesperson reviews it, adjusts it if needed and publishes. The time per vehicle drops from 10 or 15 minutes to under 2 minutes.
Read also how to use AI to generate car descriptions automatically.
See how it works at dealcar.io/software-concesionario or request a demo at dealcar.io.
Frequently asked questions
How many words should a good used car description have?
Between 150 and 300 words is the range where the description has enough information without being excessive. Below 80 words, important information is usually missing. Above 400, the buyer stops reading before reaching the end. The ideal length varies with the car's price: a 30,000-euro vehicle with lots of equipment justifies a longer description than a 6,000-euro one.
Do you need to adapt the description to each portal where it's published?
The content can be the same, but some portals have separate fields for extras, condition and terms, which makes the free-text description shorter because that information already goes in its own fields. On portals that have a single free-text field, the complete description goes all together.
Is it worth mentioning small defects in the description?
Yes, as long as it's done tactfully. A buyer who discovers a defect during the visit that wasn't mentioned in the listing loses trust even if the defect is minor. A buyer who arrives knowing that "there's a small scratch on the rear bumper, already reflected in the price" has already processed that information and doesn't perceive it as a negative surprise.
