Executive Summary: Key Legal and Evidentiary Issues

• Qualification of the high-voltage battery failure as a latent defect or vice de qualité under the statutory warranty of quality in articles 37 and 38 of the Loi sur la protection du consommateur (L.p.c.).
• Assessment of whether a 2015 Tesla Model S with more than eight years of use and about 150,000 km had served a “durée raisonnable” (reasonable useful life) in light of its luxury price point and normal wear.
• Allocation of the burden of proof on the consumer to demonstrate, on a balance of probabilities, that the battery failure was abnormal and not attributable to ordinary wear or unknown maintenance history.
• Evidentiary weight of non-expert online materials (articles, forums, compilations of cases of corrosion) compared with the absence of a formal expert report to link alleged design or sealing issues to this specific vehicle.
• Influence of prior case law on similar electric vehicle battery claims, including Marchand c. Tesla Motors Canada and Bisson c. Chrysler Canada inc., in defining what constitutes an “anormal” breakdown after high mileage and age.
• Determination that a repair cost of about $10,000, representing less than 10% of the vehicle’s original purchase price, is not abnormal at this stage of the vehicle’s life, leading to rejection of the claim and an order for the plaintiff to pay Tesla’s judicial costs of 364 $.

Facts of the case

Patrice Brunet brought a claim in the Small Claims Division of the Court of Québec against Tesla Motors Canada ULC over the failure of the high-voltage battery in his 2015 Tesla Model S. He sought a total of 14,369.79 $, broken down into 10,217.23 $ for battery repair, 419.66 $ for towing, 482.90 $ for Tesla’s diagnostic fees, 2,250 $ for loss of use of the vehicle over 45 days, and 1,000 $ in punitive damages. The core of his claim was that the battery suffered from a vice de qualité (defect in quality) and premature wear, preventing the car from serving the normal use expected of such a high-end vehicle for a reasonable period in relation to its purchase price.
Mr. Brunet had purchased the vehicle used in June 2021 from a professional dealer, H. Grégoire, for 58,634.95 $. At that time, he relied on the dealer’s confirmation that the vehicle was in good working order. The Tesla was originally a luxury electric vehicle with an initial value exceeding 120,000 $, and Mr. Brunet’s expectations regarding durability and battery life were aligned with that high price point.
On 23 November 2023, the battery failed abruptly, rendering the car inoperable. At that moment, the vehicle was just over eight years and two months old and showed around 150,000 km on the odometer. The original eight-year manufacturer’s warranty on the battery had already expired a few months earlier.
After inspection, Tesla advised Mr. Brunet that the battery was no longer functional and needed to be replaced, providing an estimate of 20,000 $ for a full battery replacement. Faced with a repair cost close to the approximate resale value of the car, he considered this situation unreasonable. Instead of going ahead with Tesla’s quote, he sought a more economical solution and had the battery repaired by a third-party specialist, VE Expert, for 10,217.23 $. He then framed that cost, along with associated towing, diagnostics and loss of use, as recoverable damages arising from an abnormal and premature failure of the battery.

Legal framework and claims under the consumer protection regime

Mr. Brunet anchored his arguments in the legal warranty of quality under the Québec consumer protection legislation. Specifically, he relied on articles 37 and 38 of the Loi sur la protection du consommateur, which require that goods sold to a consumer be fit for the use for which they are normally intended and capable of serving a normal use for a reasonable duration, having regard to the price, contractual terms and conditions of use. He argued that a luxury Tesla Model S of this nature should provide a significantly longer trouble-free useful life, particularly with respect to its central and expensive component, the high-voltage battery.
In his view, the battery’s failure so soon after the end of the eight-year manufacturer’s warranty indicated a latent defect and premature wear that fell below the statutory standard of durability. He asked the court to recognize that the useful life of his vehicle had been unreasonably curtailed, thereby engaging the warranty of quality under the L.p.c. and entitling him to reimbursement of his repair and related costs, plus loss of use and punitive damages.

Defence position and reliance on age, mileage and maintenance uncertainty

Tesla Motors Canada ULC opposed the claim primarily on the basis that the manufacturer’s warranty of eight years had clearly expired by the time of the breakdown. Beyond that, Tesla argued that a battery failure in a vehicle more than eight years old and with around 150,000 km could arise from ordinary wear and tear or from how the vehicle had been used and maintained over time.
Tesla emphasised that the maintenance and usage history of the vehicle before Mr. Brunet’s purchase was largely unknown. Since he had acquired the car second-hand, the manufacturer had no full visibility into whether the vehicle had been properly maintained or whether it had been exposed to misuse or harsh conditions that could affect the battery’s life. This uncertainty, Tesla submitted, made it impossible for the court to simply infer that the failure must be due to a design or manufacturing defect.
Tesla also contended that, given the age and mileage of the car, Mr. Brunet could not reasonably claim that it had not served a reasonable period of normal use. It argued that a repair of about 10,000 $, representing less than 10% of the original purchase price of over 120,000 $, was not out of the ordinary after many years of use of a high-technology vehicle.

Evidentiary issues and the burden of proof

The court took care to reiterate a fundamental principle of civil procedure: the party asserting a right bears the burden of proof on a balance of probabilities. Mr. Brunet therefore had to prove not only that the battery failed but that the failure was abnormal in the circumstances and that it deprived the vehicle of a reasonable useful life given its price and use conditions.
To support his theory that the defect was inherent and tied to design or sealing issues, Mr. Brunet relied on various online materials. He explained that his particular Tesla model year corresponded to the second year of production for that version and that there had been a kind of “teething period” in relation to the battery’s waterproofing and sealing. He argued that humidity had infiltrated the pack, causing corrosion, and that such corrosion should not occur in a properly sealed battery. As the battery is sealed at production, he said, any water ingress and corrosion must be due to a pre-existing defect rather than anything done during regular use.
However, Mr. Brunet did not file any expert report to confirm these technical allegations or to concretely link them to his own vehicle. Instead, he filed various articles and web pages from sources such as Carcomplaints.com, Autoevolution, forum discussions (for example Tesla Motors Club and TeslaLounge) and a document compiling reports of sealing and corrosion issues. The court found these materials insufficient, because they could not be properly validated as evidence nor directly applied to the specific battery and exact conditions of his car. Without technical expertise or a clear causal link, the court was not persuaded that there was a proven design defect relevant to this case.

Comparative case law and “reasonable” lifespan of vehicle components

In assessing whether the breakdown was abnormal, the court looked to prior decisions. In Bisson c. Chrysler Canada inc., the judge had stressed that as mileage increases, the court’s ability to rely on “judicial notice” about how long mechanical components such as engines or transmissions should last becomes more limited. Instead, technical evidence is often needed. The court considered that, by analogy, the high-voltage battery in this Tesla was a major mechanical component to which similar reasoning applied.
The judge also relied on a closely comparable case, Marchand c. Tesla Motors Canada, where the battery of a Tesla failed after eight years and nine months and 143,287 km. In that decision, the court held that such a breakdown was not abnormal. In Marchand and in other cases such as Céré c. General Motors Canada and Pigeon c. Volkswagen Groupe Canada inc., courts had considered that vehicles around nine or ten years old had generally served the normal use for which they were intended. The pattern in these authorities is that, beyond a certain age and mileage, major mechanical repairs can be expected, and the statutory warranty of quality does not guarantee a “best case scenario” or the maximum theoretical lifespan.
In Mr. Brunet’s case, the vehicle was slightly over eight years old and had around 150,000 km when the battery failed. In light of the precedents and the absence of contrary technical proof, the court concluded that this was a significant but not abnormal lifespan and that a high repair cost at that stage—representing less than 10% of the original price—did not in itself demonstrate a defect in quality.

Reasoning on the statutory warranty and rejection of the claim

Applying articles 37 and 38 of the L.p.c., the court recognised that the warranty aims to ensure that goods are fit for normal use and that they provide a reasonable duration of service, particularly in proportion to their price. However, the court was careful to circumscribe this protection. It held that the statutory warranty should not be interpreted so broadly as to guarantee consumers the longest possible lifespan of a product or to entitle them to expect performance corresponding to the most favourable theoretical scenario.
The judge accepted that some cars of the same age and mileage will last longer and that some may not experience major mechanical failures as early as this Tesla did. Nonetheless, the standard is not perfection or best-case durability; it is normal functionality over a reasonable period given the specific circumstances. Considering the vehicle’s age, mileage and the lack of persuasive expert evidence showing an inherent defect, the court found that Mr. Brunet had not discharged his burden of proving that the battery failure was abnormal. As a result, the legal warranty of quality was not triggered in the way he alleged.

Outcome and monetary consequences

On this reasoning, the Court of Québec, Small Claims Division, rejected Mr. Brunet’s entire claim against Tesla Motors Canada ULC. It found that the vehicle had served a reasonable useful life for its intended purpose and that the battery failure—though costly to address—did not constitute an abnormal breakdown in law. Consequently, Mr. Brunet was not entitled to reimbursement of his repair costs, towing, diagnostic fees, loss of use or punitive damages.
The successful party was Tesla Motors Canada ULC. The court ordered Mr. Brunet to pay Tesla its judicial costs of 364 $, corresponding to the court stamp for the contestation. No other damages, compensation or monetary awards were granted to either party, so the total amount ordered in favour of the successful party was limited to these recoverable costs of 364 $.