Index
What is considered a latent defect in a used car
What law applies when you sell as a professional
What the buyer can demand from you if there is a latent defect
The most frequent latent defects in sales
How to protect your business before a claim arrives
What the contract can and cannot do for you
How to handle a latent defect claim step-by-step
Frequently asked questions
What is considered a latent defect in a used car
A latent defect is a serious fault that existed in the vehicle before the sale, which was not detectable at first glance at the time of delivery and which, had the buyer known about it, they would not have purchased the car or would have paid a lower price.
The three requirements that must be met simultaneously are that the defect is serious (it must prevent the normal use of the vehicle or reduce it significantly, not just any minor breakdown), that it was hidden at the time of sale (if the buyer saw it, could have seen it with an ordinary inspection, or was informed about it, there is no basis for a claim), and that it is pre-existing to the sale (the defect must have existed before delivery; if it appears due to subsequent incorrect use, it does not apply).
Common cases in the sector: an engine with internal damage not visible on visual inspection, a gearbox in poor condition that fails after a few days, a repaired body structure that does not appear in the vehicle history, or a transmission system with advanced wear that does not generate obvious symptoms until weeks after delivery.
What law applies when you sell as a professional
This is the key difference compared to a sale between private individuals. When the seller is a professional, the Civil Code does not apply, but rather the Consolidated Text of the General Law for the Defence of Consumers and Users (TRLGDCU), modified by Royal Decree-law 7/2021, in force since January 2022.
Under this regulation, the professional seller is liable for lack of conformity existing at the time of delivery of the vehicle and for those that manifest during the warranty period.
The general warranty period is two years, although for second-hand goods the seller and the consumer can agree on a shorter period, never less than one year from delivery. In practice, most professional sales establish one year in the contract, which is the legal minimum allowed.
A critical point: during the first year from delivery, it is presumed that the defect already existed at the time of sale. This means that if the customer claims within that period, it is up to you to prove that the problem did not exist beforehand, not them. It is a clearly disadvantageous position if you have not properly documented the condition of the vehicle before selling it. To understand the differences between legal warranty and commercial warranty and how to offer them correctly, you can consult the article on differences between legal warranty and commercial warranty in cars.
What the buyer can demand from you if there is a latent defect
In the event of a lack of conformity, the consumer has the right to have the goods repaired, replaced, to have the price reduced, or to have the contract rescinded. The order matters: first, repair or replacement is proposed, and only if those options are impossible or disproportionate does a price reduction or refund come into play.
Furthermore, if it is proven that you knew about the defect and did not disclose it, the customer can also claim compensation for damages. And here comes a nuance that many are unaware of: claims are viable whether the seller knew about the defects or not. As a professional car dealer, the law assumes you should know the condition of the vehicle you are selling. Not being able to prove that you didn't know about the problem does not exempt you from liability.
For the dealership, repair is almost always the most economically convenient option: the cost of repairing a defect is usually much lower than refunding the full price of the vehicle. To understand the complete refund management process, you can consult the article on what to do if the customer wants to return the car.
The most frequent latent defects in sales
There are types of defects that recurrently generate claims. Knowing them helps to know where to focus before putting a car up for sale.
Mechanical problems not obvious on visual inspection. Advanced wear of the engine, gearbox, or clutch is not always detected in a short test drive. If the car has high actual mileage or has suffered from poor maintenance, the fault can appear a few weeks after the sale.
Accidents not reflected in the history. A car repaired without going through insurance leaves no trace on CARFAX or in DGT reports. If the repair was substandard or affected structural elements, it can generate safety issues that the buyer will detect late.
Manipulated odometer. Mileage tampering is one of the most serious grounds for a claim. Even if you bought the car without knowing the odometer had been altered, if you sell it and the customer proves it, the liability falls on you. Vehicle history reports are the best tool to detect this before the problem reaches your showroom.
Hidden charges and debts. Embargos, retention of title, or finance debts that do not appear at first glance. Consulting the DGT report before every purchase is essential to avoid taking on problems that came with the vehicle. To know which charges can affect the transfer of a vehicle and how to resolve them, you can consult the guide on how to remove an embargo from a car.
How to protect your business before a claim arrives
The best defence against a latent defect claim is to have prevented it before the sale.
Check every car thoroughly before putting it up for sale. A mechanical check-up by a trusted workshop, before putting the car into stock, allows you to detect problems that you won't be able to claim you knew nothing about later. If you document that inspection, you have a solid argument in case of a subsequent claim.
Always consult the DGT and CARFAX report. These are the two documents that provide the most objective information about the real state of the vehicle: accident history, ownership changes, charges, MOT, and registered mileage records. Doing this for every transaction, both when buying and before selling, is a basic risk management practice.
Draft the contract well. A sales contract with the known defects declared, the condition of the vehicle described, and the agreed warranty period is your main legal tool. If the buyer signs acknowledging having been informed of the vehicle's condition, this has legal weight in the event of a dispute. To see which clauses are essential in each type of contract, you can consult the guide on essential contracts in professional car sales.
Use a signed delivery note. This document records the exact condition of the vehicle at the moment of delivery and is signed by the buyer. If a defect appears later, the delivery note is proof that this problem did not exist, or was not visible, when the car changed hands.
Respond quickly to any claim. If a customer calls with a breakdown, managing the first few days well is decisive. A prompt, documented, and resolution-oriented response usually prevents the conflict from escalating. Silence or evasiveness is the fastest path to a formal claim.
What the contract can and cannot do for you
A common mistake is believing that by including a generic clause like "the buyer is aware of the condition of the vehicle and exempts the seller from liability" you are covered. Spanish courts have systematically declared these types of clauses null and void when they affect consumer rights, especially if the seller is a professional.
What does work is being transparent and documenting it: declaring known defects in the contract, reducing the warranty period to the legal minimum of one year when applicable, and keeping a written record of the condition of the vehicle at delivery. This does not eliminate liability, but it limits it and gives you solid arguments if the claim reaches a court.
To understand how to preventively manage claims and the steps to follow when they arrive, you can consult the guide on how to prevent claims after selling a used car.
How to handle a latent defect claim step-by-step
Step 1: Listen and document. Ask the customer to describe the problem in detail. Do not commit to anything during the first contact.
Step 2: Review the vehicle file. Signed contract, description of the condition at delivery, delivery note/certificate of conformity, photographs, and warranty coverage. With this information, evaluate whether the claim has a valid basis.
Step 3: Inspect the vehicle. The technical diagnosis is the central element to determine whether the defect is pre-existing or occurred after delivery.
Step 4: Evaluate the legal basis. With the file and the diagnosis, it can be determined whether the defect falls within the warranty, if it was a latent defect, if there is a breach of contract, or if the claim has no basis.
Step 5: Respond in writing. If the claim has a basis, propose repair as the first option. If it does not, explain the reasons with reference to the contract and the established facts. Always in writing.
Step 6: Document the resolution. Any agreement (repair carried out, price reduction agreed) must be documented and signed by both parties.
More than 750 dealerships already use Dealcar to manage their daily operations
From the file of each vehicle in Dealcar, you can consult the DGT and CARFAX report, generate sales contracts, register the certificate of conformity, and keep complete control of each sales file. When a claim arrives, all the information needed to evaluate and respond to it is available in seconds.
If you want to see how it works, you can schedule a free demo at dealcar.io.
Frequently asked questions
How long must I respond as a professional seller for a latent defect?
If you have agreed to a one-year warranty in the contract, that is your minimum exposure period. During that year, if the customer detects a serious defect, you may be required to repair, replace, or refund the amount. The general term of the law is two years, but for second-hand cars, you can contractually reduce it to a minimum of one year.
Can I refuse to respond if I bought the car without knowing it had that defect?
Not necessarily. As a professional seller, the law assumes you should know the condition of the vehicle you are selling. Not knowing about the defect does not automatically exempt you. Where your position does improve is if you can prove that you carried out a documented prior inspection and that the defect was not detectable.
Does a clause in the contract stating that the buyer waives the right to claim for latent defects have legal value?
In sales to consumers, no. The courts have repeatedly declared these types of clauses null and void when the seller is a professional. Consumer rights regarding latent defects cannot be waived. What you can do is reduce the warranty period to the legal minimum of one year and document the condition of the vehicle well at delivery.
What is the difference between a latent defect and a normal breakdown after the sale?
A latent defect is a serious flaw that existed before the sale and was not visible at the time of delivery. A breakdown caused by subsequent use or lack of maintenance by the buyer is not a latent defect. Key is proving when the problem originated, and for that, an expert report is decisive.
What do I do if the customer claims against me and I believe the defect did not exist when I sold the car?
Respond in writing without ignoring the claim and propose a joint or expert inspection. If the defect originated after delivery or was caused by misuse, you have arguments not to take on the repair. If you have the signed certificate of conformity and the prior inspection documented, that paperwork is your best defence.
Index
What is considered a latent defect in a used car
What law applies when you sell as a professional
What the buyer can demand from you if there is a latent defect
The most frequent latent defects in sales
How to protect your business before a claim arrives
What the contract can and cannot do for you
How to handle a latent defect claim step-by-step
Frequently asked questions
What is considered a latent defect in a used car
A latent defect is a serious fault that existed in the vehicle before the sale, which was not detectable at first glance at the time of delivery and which, had the buyer known about it, they would not have purchased the car or would have paid a lower price.
The three requirements that must be met simultaneously are that the defect is serious (it must prevent the normal use of the vehicle or reduce it significantly, not just any minor breakdown), that it was hidden at the time of sale (if the buyer saw it, could have seen it with an ordinary inspection, or was informed about it, there is no basis for a claim), and that it is pre-existing to the sale (the defect must have existed before delivery; if it appears due to subsequent incorrect use, it does not apply).
Common cases in the sector: an engine with internal damage not visible on visual inspection, a gearbox in poor condition that fails after a few days, a repaired body structure that does not appear in the vehicle history, or a transmission system with advanced wear that does not generate obvious symptoms until weeks after delivery.
What law applies when you sell as a professional
This is the key difference compared to a sale between private individuals. When the seller is a professional, the Civil Code does not apply, but rather the Consolidated Text of the General Law for the Defence of Consumers and Users (TRLGDCU), modified by Royal Decree-law 7/2021, in force since January 2022.
Under this regulation, the professional seller is liable for lack of conformity existing at the time of delivery of the vehicle and for those that manifest during the warranty period.
The general warranty period is two years, although for second-hand goods the seller and the consumer can agree on a shorter period, never less than one year from delivery. In practice, most professional sales establish one year in the contract, which is the legal minimum allowed.
A critical point: during the first year from delivery, it is presumed that the defect already existed at the time of sale. This means that if the customer claims within that period, it is up to you to prove that the problem did not exist beforehand, not them. It is a clearly disadvantageous position if you have not properly documented the condition of the vehicle before selling it. To understand the differences between legal warranty and commercial warranty and how to offer them correctly, you can consult the article on differences between legal warranty and commercial warranty in cars.
What the buyer can demand from you if there is a latent defect
In the event of a lack of conformity, the consumer has the right to have the goods repaired, replaced, to have the price reduced, or to have the contract rescinded. The order matters: first, repair or replacement is proposed, and only if those options are impossible or disproportionate does a price reduction or refund come into play.
Furthermore, if it is proven that you knew about the defect and did not disclose it, the customer can also claim compensation for damages. And here comes a nuance that many are unaware of: claims are viable whether the seller knew about the defects or not. As a professional car dealer, the law assumes you should know the condition of the vehicle you are selling. Not being able to prove that you didn't know about the problem does not exempt you from liability.
For the dealership, repair is almost always the most economically convenient option: the cost of repairing a defect is usually much lower than refunding the full price of the vehicle. To understand the complete refund management process, you can consult the article on what to do if the customer wants to return the car.
The most frequent latent defects in sales
There are types of defects that recurrently generate claims. Knowing them helps to know where to focus before putting a car up for sale.
Mechanical problems not obvious on visual inspection. Advanced wear of the engine, gearbox, or clutch is not always detected in a short test drive. If the car has high actual mileage or has suffered from poor maintenance, the fault can appear a few weeks after the sale.
Accidents not reflected in the history. A car repaired without going through insurance leaves no trace on CARFAX or in DGT reports. If the repair was substandard or affected structural elements, it can generate safety issues that the buyer will detect late.
Manipulated odometer. Mileage tampering is one of the most serious grounds for a claim. Even if you bought the car without knowing the odometer had been altered, if you sell it and the customer proves it, the liability falls on you. Vehicle history reports are the best tool to detect this before the problem reaches your showroom.
Hidden charges and debts. Embargos, retention of title, or finance debts that do not appear at first glance. Consulting the DGT report before every purchase is essential to avoid taking on problems that came with the vehicle. To know which charges can affect the transfer of a vehicle and how to resolve them, you can consult the guide on how to remove an embargo from a car.
How to protect your business before a claim arrives
The best defence against a latent defect claim is to have prevented it before the sale.
Check every car thoroughly before putting it up for sale. A mechanical check-up by a trusted workshop, before putting the car into stock, allows you to detect problems that you won't be able to claim you knew nothing about later. If you document that inspection, you have a solid argument in case of a subsequent claim.
Always consult the DGT and CARFAX report. These are the two documents that provide the most objective information about the real state of the vehicle: accident history, ownership changes, charges, MOT, and registered mileage records. Doing this for every transaction, both when buying and before selling, is a basic risk management practice.
Draft the contract well. A sales contract with the known defects declared, the condition of the vehicle described, and the agreed warranty period is your main legal tool. If the buyer signs acknowledging having been informed of the vehicle's condition, this has legal weight in the event of a dispute. To see which clauses are essential in each type of contract, you can consult the guide on essential contracts in professional car sales.
Use a signed delivery note. This document records the exact condition of the vehicle at the moment of delivery and is signed by the buyer. If a defect appears later, the delivery note is proof that this problem did not exist, or was not visible, when the car changed hands.
Respond quickly to any claim. If a customer calls with a breakdown, managing the first few days well is decisive. A prompt, documented, and resolution-oriented response usually prevents the conflict from escalating. Silence or evasiveness is the fastest path to a formal claim.
What the contract can and cannot do for you
A common mistake is believing that by including a generic clause like "the buyer is aware of the condition of the vehicle and exempts the seller from liability" you are covered. Spanish courts have systematically declared these types of clauses null and void when they affect consumer rights, especially if the seller is a professional.
What does work is being transparent and documenting it: declaring known defects in the contract, reducing the warranty period to the legal minimum of one year when applicable, and keeping a written record of the condition of the vehicle at delivery. This does not eliminate liability, but it limits it and gives you solid arguments if the claim reaches a court.
To understand how to preventively manage claims and the steps to follow when they arrive, you can consult the guide on how to prevent claims after selling a used car.
How to handle a latent defect claim step-by-step
Step 1: Listen and document. Ask the customer to describe the problem in detail. Do not commit to anything during the first contact.
Step 2: Review the vehicle file. Signed contract, description of the condition at delivery, delivery note/certificate of conformity, photographs, and warranty coverage. With this information, evaluate whether the claim has a valid basis.
Step 3: Inspect the vehicle. The technical diagnosis is the central element to determine whether the defect is pre-existing or occurred after delivery.
Step 4: Evaluate the legal basis. With the file and the diagnosis, it can be determined whether the defect falls within the warranty, if it was a latent defect, if there is a breach of contract, or if the claim has no basis.
Step 5: Respond in writing. If the claim has a basis, propose repair as the first option. If it does not, explain the reasons with reference to the contract and the established facts. Always in writing.
Step 6: Document the resolution. Any agreement (repair carried out, price reduction agreed) must be documented and signed by both parties.
More than 750 dealerships already use Dealcar to manage their daily operations
From the file of each vehicle in Dealcar, you can consult the DGT and CARFAX report, generate sales contracts, register the certificate of conformity, and keep complete control of each sales file. When a claim arrives, all the information needed to evaluate and respond to it is available in seconds.
If you want to see how it works, you can schedule a free demo at dealcar.io.
Frequently asked questions
How long must I respond as a professional seller for a latent defect?
If you have agreed to a one-year warranty in the contract, that is your minimum exposure period. During that year, if the customer detects a serious defect, you may be required to repair, replace, or refund the amount. The general term of the law is two years, but for second-hand cars, you can contractually reduce it to a minimum of one year.
Can I refuse to respond if I bought the car without knowing it had that defect?
Not necessarily. As a professional seller, the law assumes you should know the condition of the vehicle you are selling. Not knowing about the defect does not automatically exempt you. Where your position does improve is if you can prove that you carried out a documented prior inspection and that the defect was not detectable.
Does a clause in the contract stating that the buyer waives the right to claim for latent defects have legal value?
In sales to consumers, no. The courts have repeatedly declared these types of clauses null and void when the seller is a professional. Consumer rights regarding latent defects cannot be waived. What you can do is reduce the warranty period to the legal minimum of one year and document the condition of the vehicle well at delivery.
What is the difference between a latent defect and a normal breakdown after the sale?
A latent defect is a serious flaw that existed before the sale and was not visible at the time of delivery. A breakdown caused by subsequent use or lack of maintenance by the buyer is not a latent defect. Key is proving when the problem originated, and for that, an expert report is decisive.
What do I do if the customer claims against me and I believe the defect did not exist when I sold the car?
Respond in writing without ignoring the claim and propose a joint or expert inspection. If the defect originated after delivery or was caused by misuse, you have arguments not to take on the repair. If you have the signed certificate of conformity and the prior inspection documented, that paperwork is your best defence.
