Hidden defect in a luxury car: purchase, trade-in and remedies

Key points

• A hidden defect is a serious defect that existed before the sale and could not be seen in a normal inspection (article 1641 of the French Civil Code).
• On a prestige car, the stakes are multiplied: a gearbox, an engine or a structure can cost tens of thousands of euros.
• The dealer who takes your car in trade is a professional buyer: what a trained eye could have seen will not be a hidden defect for them.
• The buyer has two years from discovery of the defect, within a limit of twenty years after the sale.
• Escrowing part of the price during a thorough inspection avoids chasing your money afterwards.

Three conditions, no fewer

The seller must warrant the buyer against hidden defects that make the car unfit for its use, or reduce that use so much that the buyer would not have bought it, or would have paid less (article 1641 of the French Civil Code). Three cumulative conditions follow.

• The defect is hidden: the seller is not liable for apparent defects that the buyer could have noticed themselves (article 1642 of the French Civil Code). A warning light on during the test drive or an obvious noise does not qualify.
• The defect predates the sale, at least in embryo, even if it only shows up afterwards.
• The defect is serious: normal wear of a part, given the age and mileage, is not enough.

The defects that cost dearly on a prestige car

A luxury car has no more defects than any other, but each one weighs more. Disputes most often concern:

• the engine: abnormal oil consumption, timing chain, cylinder head, failure shortly after delivery;
• the gearbox, especially robotised or dual-clutch: slipping, jerks, limp mode;
• air suspension, carbon-ceramic brakes and on-board electronics, whose failures recur;
• an accident repaired outside the manufacturer's network, a straightened structure, paint that hides damage;
• altered mileage, which distorts any assessment of the car's condition and is also a criminal matter;
• for a classic car, non-original parts: engine, gearbox or chassis that do not match ("matching numbers").

The roadworthiness test settles nothing: a favourable report does not rule out a hidden defect, as it covers safety points, not the condition of an engine or a gearbox.

Buying from a professional: maximum protection

Against a dealer or trader, the consumer buyer has two protections. First, the statutory conformity guarantee (articles L. 217-3 et seq. of the French Consumer Code): for a used vehicle, a defect that appears within twelve months of delivery is presumed to have existed from the outset (article L. 217-7 of the French Consumer Code). Second, the hidden defects warranty, with a major advantage: case law presumes that a professional seller knows the defects of what they sell. They must then, in addition to the price, make good all the buyer's loss (article 1645 of the French Civil Code).

The trade-in: when you become the seller

You buy a new car and the dealer takes the old one in trade, deducting its value from the price. Legally, you are then a private seller, and the dealer a professional buyer. This reversal changes everything.

• You owe the hidden defects warranty: the dealer can turn against you if they discover a serious, pre-existing defect.
• But the dealer is an automotive professional: what a careful professional examination could have revealed is, for them, an apparent defect. Their room for recourse is correspondingly reduced.
• A clause excluding the warranty is valid in a trade-in contract, provided you were unaware of the defect (article 1643 of the French Civil Code).
• Deliberate silence about a known defect, or tampered mileage, remains sanctioned: the clause falls and fraud can lead to annulment of the sale.

In practice, state in writing what you know (accidents, repairs, known defects), attach the invoices, and have the car's condition recorded at the time of the trade-in. On the dealer's side, a prestige vehicle is rarely taken in without a prior inspection, and the trade-in price is often conditional on its result.

The buyer's remedies

The buyer chooses between returning the car and getting the price back, or keeping it and obtaining a price reduction (article 1644 of the French Civil Code). A seller who was unaware of the defect owes only the price and the costs of the sale (article 1646 of the French Civil Code); one who knew of it also owes damages: immobilisation, hire of a replacement vehicle, towing, loss of use.

Two years to act, twenty years at most

The action must be brought within two years of discovering the defect (article 1648 of the French Civil Code). The Court of Cassation set the framework in 2023: this period is a limitation period, which can be suspended in particular when an expert inspection is ordered, and the action can in any event not exceed twenty years from the sale (Cass. ch. mixte, 21 July 2023, no. 21-17.789).

Proving the defect: expert inspection first

• Immobilise the car if safety is at stake, and do not have it repaired before the inspection: you would destroy the evidence.
• Gather the contract, the advertisement, exchanges with the seller, the service book and the invoices.
• Arrange an adversarial out-of-court expert inspection, summoning the seller by registered letter.
• Failing agreement, ask the court for a court-appointed expert inspection before any trial (article 145 of the French Code of Civil Procedure), which also suspends the time limit for acting (article 2239 of the French Civil Code).

Prevent rather than litigate: escrow of the price

A hidden defect lawsuit over a prestige car takes a long time and costs a lot, and the judgment is only worth the seller's solvency. The best defence is put in place before the sale: inspection by an independent expert, written statements from the seller on the car's history, and escrow of the price.

The buyer, as depositing party, pays the price into a CARPA account, and it is released to the seller, as beneficiary, only once the agreed conditions precedent are met: favourable inspection, handover of the documents, test drive. The parties may also agree to keep part of the price in escrow for a few weeks after delivery, long enough for a visit to a workshop. For private sales, see our guide to selling a luxury car and our article on remedies after buying from a private seller.