The car reliability sheets published by LPDD Conseil assign a score out of 5 to each engine type, rank the versions from best to worst, and list recurring breakdowns by mechanical component. For a used vehicle buyer, the question is not whether these sheets are useful, but rather understanding what each section actually measures and how to make a concrete purchasing decision.
Transmission and gearbox: the point of caution that the overall score masks
Most buyers focus on the engine score. However, the score assigned to the gearbox deserves closer attention, as a transmission replacement costs significantly more than an intervention on the engine block.
On the sheet for the Nissan Qashqai J11 published in August 2026, LPDD Conseil identifies the CVT gearbox as a priority point of caution. This type of alert does not appear in the overall score of the model: you need to delve into the details of the sheet to spot it.
The LPDD Conseil car reliability sheets structure each model into distinct sections (petrol engine, diesel engine, manual gearbox, automatic gearbox, transmission). Reading the overall score without opening these sections is akin to choosing an apartment based solely on the price per square meter, without checking the condition of the roof.
Engine score out of 5: reading grid and alert thresholds
Each engine type receives a score out of 5. This compact scale requires calibrated interpretation, as the gap between two consecutive scores reflects very different mechanical realities.
| Score out of 5 | What it concretely means | Recommended purchasing attitude |
|---|---|---|
| 4 to 5 | Rare breakdowns, standard maintenance, few negative feedback | Calm purchase, negotiation on overall condition |
| 3 | Some identified weaknesses, often on a specific component | Check the reported component before making any offer |
| 2 | Documented recurring breakdowns, maintenance costs above average | Reserve for buyers capable of doing the maintenance themselves |
| 1 to 1.5 | Known structural issue (turbo, DPF, injection), risk of major breakdown | Avoid unless very low price and anticipated repair budget |
A score of 3 out of 5 is not an average score. It indicates a recurring defect in at least one component. The common mistake is to treat this score as a “passing” grade when it actually points to an identified mechanical risk.
Comparing scores between engine types of the same model
The true value of the sheet appears when comparing the engine types against each other. For the same model, the gap between a well-rated petrol engine and a diesel penalized by a DPF or turbo issue can represent several hundred euros in annual maintenance.
LPDD Conseil provides a ranking of the best engine to the worst for each sheet. This ranking is the first element to consult, even before the technical details, as it immediately guides the search scope in the used market.
Recurring breakdowns and maintenance costs: reading between the lines of the sheet
The sheets are not limited to a score. They detail recurring breakdowns by category: oil leaks, premature wear of shock absorbers, injection failures, distribution problems. This list serves as a checklist to take during the vehicle test.
- A report of recurring oil leaks requires checking underneath the engine and asking the seller for maintenance invoices.
- A mention of a turbo problem on a specific block justifies an extended test at different RPMs to detect abnormal whistling or power loss.
- A warning point on the shock absorbers directs attention to checking the suspension, even if the displayed mileage seems low.
The sheet also indicates the preferred version of the LPDD Conseil team. This recommendation combines mechanical reliability, value for money in the used market, and predictable maintenance costs. The recommended version is not always the highest rated: it may be an engine rated 4 instead of 5 if the former offers a better purchase price and cost of ownership.
LPDD reliability and mileage: adapting the reading to the vehicle profile
An engine rated 4 out of 5 with low mileage is not worth the same as an engine rated 4 with over 150,000 km. The LPDD Conseil sheets document breakdowns by usage range, allowing for cross-referencing the score with the mileage of the targeted vehicle.
For high-mileage vehicles, the section on wear components (clutch, timing belt, injectors) takes precedence over the raw engine score. A well-rated block but whose timing belt has never been replaced beyond the recommended threshold remains a risky purchase.
Cross-referencing the sheet with the maintenance log
The sheet serves as a reading grid for the maintenance log provided by the seller. If LPDD reports a weakness in the injection system of a petrol engine and the log does not mention any intervention on this component after significant mileage, it is a concrete alert signal for negotiation or abandoning the offer.
- Identify in the sheet the components at risk for the targeted engine.
- Check in the maintenance log if these components have been replaced or inspected.
- Use any discrepancies between the two as a negotiable argument with the seller.
The LPDD Conseil sheets are regularly updated, with a section “News and Auto Tips” enriched in 2026. Checking the update date of the sheet before using it ensures that the reported breakdowns incorporate the most recent feedback from owners and mechanics.
A documented car purchase relies on the ability to transform a reliability sheet into precise questions posed to the seller and physical check points during the test drive. The score out of 5 opens the door, but it is the detail of recurring breakdowns, cross-referenced with mileage and the maintenance log, that closes the risk.