Executive Summary: Key Legal and Evidentiary Issues

• Central issue was whether the used 2005 Porsche 911 sold by Mercedes-Benz Granby (MBG) to consumer John Kestle was affected by a latent defect at the time of delivery, engaging both the Civil Code warranty of quality and the statutory consumer warranty of durability.
• Evaluation of the expert mechanical evidence, especially Sati Bhogal’s teardown of the engine, was decisive in establishing that a prior improper reboring and sleeving of one bank of cylinders caused the catastrophic engine failure.
• The court examined whether the defect was “hidden” despite Kestle’s pre-purchase request for a bore-scope inspection by MBG, concluding that neither buyer nor seller could have detected the problem through a prudent examination.
• A key legal question concerned the appropriate remedy and quantum: whether Kestle, who chose to keep the vehicle and install a new engine, could claim the full cost of a new engine and substantial moral damages or was limited to a reasonable price reduction.
• The court closely assessed MBG’s post-failure conduct, including its offer of a free replacement used engine, and applied the duty to mitigate damages and the merchant’s right to perform repairs at lower cost.
• On the procedural side, MBG’s reconventional demand for nearly $40,000 in legal fees for alleged abusive proceedings tested the threshold under article 51 C.C.P., ultimately being rejected as the action was partially justified and not excessive in its conduct.

Facts and procedural background

John Kestle, an Ontario resident, purchased a used 2005 Porsche 911 from Mercedes-Benz Granby (9324-4960 Québec inc., “MBG”), a professional car dealer in Quebec. The transaction was a consumer purchase of a high-end used vehicle for personal use for a price in the vicinity of $50,000 before taxes, bringing it within the scope of the Quebec Consumer Protection Act (Loi sur la protection du consommateur – LPC) as well as the general warranty of quality in the Civil Code of Québec. Before finalizing the purchase and taking possession on 21 July 2022, Kestle insisted on a specific pre-purchase inspection: a bore-scope (test d’alésage) of the engine cylinders to check their internal condition. MBG itself performed this test using a camera inserted through the spark plug holes, and no abnormality was detected or reported at that time. Shortly after returning to Ontario with the vehicle, Kestle and his employee, Claude Baillargeon, who had automotive mechanical knowledge, noticed a knocking or clacking noise apparently coming from the engine. Concerned, Baillargeon urged further investigation. Kestle phoned two individuals: first, Porsche product specialist and expert Sati Bhogal, who advised him to monitor the oil level; and second, MBG’s sales director, François D’André. D’André, familiar with Porsche products, listened to the noise over the phone but concluded it did not sound alarming and related it to the specific mechanical configuration of the Porsche 911’s flat-six engine. Several weeks later, while Kestle was accelerating via a highway on-ramp, the engine failed catastrophically in a cloud of blue smoke, abruptly losing power and stopping for good. This failure prompted legal action in Quebec against MBG.

Kestle alleged that the Porsche engine was affected by a serious latent defect that existed at the time of sale, making the vehicle unfit for normal use and triggering the statutory and civil law warranties. He sought extensive compensation, including the cost of having a new engine block installed by his chosen expert and a substantial sum for loss of enjoyment and inconvenience. MBG denied liability for any latent defect at the time of sale and suggested that improper use, excessive oil, or other factors might have contributed, though these suggestions were not backed by expert evidence. MBG also filed a reconventional demand under article 51 of the Code of Civil Procedure, claiming that Kestle’s suit was abusive, especially given the high monetary claim, and sought approximately $40,000 in legal fees as damages for abuse of process.

Legal framework and issues

The court identified three main questions: whether the Porsche 911 sold by MBG was affected by a latent defect at delivery; if so, what amount Kestle was entitled to receive; and whether MBG’s reconventional claim alleging abusive proceedings should be upheld. On the substantive side, the judge applied both the Consumer Protection Act and the Civil Code of Québec. Under articles 37 and 38 LPC, a consumer is entitled to goods that are fit for their intended purpose and that will serve that purpose for a reasonable time, taking into account circumstances such as price. A breach of this legal warranty gives the consumer access to a range of remedies under article 272 LPC, including reduction of obligations, contract resolution, and compensatory or punitive damages. In parallel, article 1726 C.C.Q. provides that the seller must warrant the buyer against latent defects that render the property unfit for the use for which it was intended, or so diminish its usefulness that the buyer would not have bought it, or would have paid a lesser price, had they known. The buyer must prove a defect of sufficient gravity, its existence at the time of sale, and its hidden nature. A defect is “hidden” if it is unknown to the buyer and would not be discovered by a prudent and diligent examination without resort to an expert. Where the seller is a professional in that type of goods, article 1729 C.C.Q. allows a presumption that the defect existed at the time of sale when it manifests prematurely compared with similar goods. The Code’s remedies are the reduction of price (quantum minoris) or nullity of the sale (resolution), with the choice guided in part by proportionality between repair costs and the value of the property. In civil matters, the burden of proof lies with the claimant on a balance of probabilities for both the main claim and any reconventional demand. Procedurally, MBG invoked article 51 C.C.P., which prohibits excessive or unreasonable use of procedure and enables a party to seek compensation where the other side’s conduct is abusive. The court therefore had to assess both the merits and the reasonableness of the amounts claimed.

Expert evidence and finding of latent defect

The determining evidence came from expert witness Sati Bhogal, testifying via videoconference and through his written report. After Kestle’s engine failed, Bhogal disassembled it in his shop and effectively “brought the court into the workshop” by showing the defective parts and explaining what had happened. He discovered that one bank of three cylinders had previously been improperly re-bored and fitted with sleeves (chemises), whereas the original engine configuration, and the other bank, had no such sleeves. One of these sleeves had become detached inside its cylinder, apparently rotating at least half a turn and likely moving back and forth under piston action. The piston associated with that cylinder was destroyed, and the connecting rod was broken. According to Bhogal, the abnormal sleeve movement probably produced the knocking noise that Kestle and Baillargeon had heard shortly after the purchase. The failure occurred under acceleration, when the engine’s revolutions rose sharply on the highway on-ramp. This expert account was uncontested: MBG did not produce a competing expert report or testimony to explain the failure differently. MBG’s witnesses speculated about potential issues such as overfilling oil or abusive driving, but these suggestions lacked factual and expert support, and the court did not give them weight.

The judge concluded that the engine failure was caused by a faulty re-machining and sleeving of the engine performed before MBG acquired the vehicle. This prior improper reconditioning constituted a structural defect that pre-existed the sale from MBG to Kestle. The evidence also showed that the defect manifested within a very short period after delivery. The knocking noise was heard by Kestle, Baillargeon, and later noted in a call to D’André very soon after Kestle took possession and returned to Ontario. Before the sale, several mechanical inspections and road tests by different people had revealed no problems or abnormal noises; the knocking only arose shortly after delivery, which fit with a defect emerging prematurely. On the hidden nature of the defect, the court emphasized that even the specific bore-scope inspection requested by Kestle and carried out by MBG did not reveal any issue inside the cylinder at that time. It appeared that the sleeve had not yet become detached when the test was performed, and from the interior view nothing abnormal was visible. The court stressed that neither MBG nor, a fortiori, Kestle could have detected the problem through a prudent, diligent pre-purchase examination, particularly since even an internal camera test had not shown it. This satisfied the “hidden” criterion under the law.

Taken together, these findings meant that Kestle had met his burden to prove a latent defect: the defect was serious, it existed at the time of sale (since the faulty machining and sleeving predated MBG’s purchase of the car), and it was hidden despite reasonable pre-purchase inspections. Against this backdrop, the judge considered that there was no need to rely expressly on the presumption in article 1729 C.C.Q., since the factual record was strong enough on its own, and that the consumer warranty under articles 37 and 38 LPC unquestionably applied given the nature and price of the vehicle and the extremely short time before the engine failed.

Remedies, quantum, and duty to mitigate

The more difficult issue was the appropriate remedy and amount of compensation. Kestle did not seek to cancel the sale. Instead, he elected to keep the Porsche and claimed the full cost of installing a new engine block by Bhogal, amounting to $60,200.69, plus $10,000 in damages for trouble and loss of enjoyment, for a total exceeding $70,000. This claim far surpassed the vehicle’s purchase price once taxes were considered (the total purchase “all in” was about $55,000). The judge regarded such a claim as disproportionate in the context of a latent defect case involving a used car of that approximate value. Jurisprudence cited by the court warns against allowing a purchaser to obtain a reduction in price exceeding the value of the property while retaining the property, noting that this runs counter to the structure of the remedies for latent defects. The court reiterated that in a reduction-of-price action, the guiding measure is not automatically the full repair cost but rather the price the buyer would have paid had the defect been known. If the defect is such that the buyer would not have purchased at all, or if the required repair costs are excessive relative to the asset’s value, cancellation of the sale is the more appropriate remedy. The closer repair costs approach or exceed the value of the property, the less suitable an action in reduction of price becomes.

In addition, Quebec law obliges a plaintiff to mitigate damages. Courts frequently recognize the seller’s correlative right to undertake or arrange the repairs at a lower reasonable cost. In this case, evidence showed that MBG, after initially offering a monetary settlement that Kestle refused, proposed at its own expense to replace Kestle’s engine with a used but comparable engine. That replacement engine, from a slightly newer model year and with lower mileage, would have cost MBG $19,510.80 but would have been supplied and installed at no charge to Kestle. Kestle refused this solution because he did not know the origin and “pedigree” of the proposed engine and preferred a brand-new block from his chosen expert. The court acknowledged that installing a used engine entails some risk but found that this risk was not fundamentally greater than the risk already accepted by Kestle when purchasing a high-mileage, auction-sourced used Porsche with limited history. The judge noted that the vehicle itself was acquired through an auction, with its past largely unknown, and that the Porsche as sold carried no conventional warranty beyond the statutory and civil law protections; the same would have been true of the replacement used engine, which would also have benefited from the legal warranty of fitness and durability. The court thus concluded that while Kestle was free, for his own peace of mind or to improve the car’s value, to invest in a new engine, MBG could not be required to bear the entire cost of that personal choice.

Given MBG’s reasonable offer to supply and install a used engine at its own cost, the court held that this offer effectively set the ceiling on what MBG could fairly be ordered to pay. Allowing more would be inconsistent with the duty to mitigate and with the principle that a seller can repair or replace at lower reasonable cost. The judge therefore fixed the reduction of price at $19,510.80, corresponding to the value of MBG’s rejected solution. As to additional damages for trouble, inconvenience, and loss of enjoyment, the court accepted that Kestle had endured significant frustration and was deprived of his dream car for about a year. However, MBG’s conduct throughout, particularly in addressing other issues, weighed strongly against awarding extra moral damages. MBG had already absorbed the cost of resolving electrical problems that arose immediately after delivery and had also replaced the brakes so the car would satisfy Ontario’s regulatory requirements. After the engine failure, MBG’s representative, Martin Tremblay, promptly attempted to negotiate a solution—either in money or services—without even having seen the vehicle. The judge found that much of Kestle’s hardship stemmed from his own inflexibility in refusing the offered used engine rather than from MBG’s actions or omissions. Even the prolonged loss of use of the vehicle was linked to Kestle’s choices, as accepting the offered engine would likely have limited his loss of use to a few winter weeks when he did not drive the car anyway. The court also saw no evidence tying Kestle’s non-pecuniary harm to any bad faith, presumed knowledge, or fault beyond the defect itself on MBG’s part. On this basis, it declined to award separate moral or punitive damages, confining relief to the quantified price reduction.

Abuse of process and reconventional demand

On the abuse-of-process issue, MBG had counterclaimed under article 51 C.C.P., seeking nearly $40,000 in legal fees on the theory that Kestle’s claim was grossly exaggerated and abusive. The judge began by noting that, at the threshold, the initiation of the action itself could not be characterized as unreasonable or abusive because it was ultimately successful in part: the existence of a latent defect was established, and MBG was held liable to compensate Kestle. MBG’s real complaint lay in the amount claimed, which, as the judge acknowledged, was indeed excessive compared with the context and the appropriate remedy. However, a high claim alone does not automatically amount to abusive use of procedure. The judge examined the procedural history: the trial lasted just over one day, there were no extraordinary or harassing motions, and, apart from the initial originating application, the main procedural activity came from MBG itself (including security-for-costs requests, applications to be relieved of default, and out-of-court examinations), none of which were contested by Kestle. The originating application did not contain injurious, defamatory, or embarrassing allegations. While the case might have been settled and the matter arguably could have been approached differently, the fact that the engine had already been replaced before suit was filed made the settlement scenario speculative. Importantly, the court found no evidence that the size of the claim had altered the course or cost of the proceedings in a concrete way, nor that it had directly caused the level of legal fees MBG incurred. Many claims are partially rejected or only partially upheld without constituting abusive procedure, and the judge was reluctant to penalize a consumer plaintiff for overestimating the proper remedy in a complex legal environment. Consequently, the reconventional demand was dismissed as unfounded.

Outcome and final orders

In its dispositive section, the Court of Québec allowed Kestle’s action in part. It ordered 9324-4960 Québec inc. (MBG) to pay Kestle $19,510.80 as a reduction of the price, corresponding to the reasonable cost of MBG’s earlier offer of a used replacement engine, together with legal interest at the statutory rate and the additional indemnity under article 1619 C.C.Q., calculated from the date of service of the action until full payment. The court also ordered MBG to reimburse Kestle his court costs limited to the $380 filing fee and dismissed MBG’s reconventional claim for alleged abusive proceedings without costs. The successful party was therefore the plaintiff, John Kestle, who obtained a total fixed monetary award of $19,890.80 (comprising $19,510.80 in damages and $380 in recoverable court fees), with additional interest and the statutory indemnity, the precise amount of which cannot be determined from the judgment text because it depends on the passage of time after the date of service.