Audi Q7 S Line TDI Quattro Auto (2018)
2018 Audi Q7 S Line TDI Quattro Auto
CarHunch analysed 276 real MOT records for the 2018 Audi Q7 S Line TDI Quattro Auto. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2018 Q7 S Line is underperforming at MOT: a 62.3% first-time pass rate sits well below the UK average of 80%, meaning you should expect one in three of these cars to fail on their first test attempt. The good news is that dangerous defects are absent from this dataset, and the 0.21 average failures per vehicle suggests issues are minor when they do occur.
At 68,000 miles average, these Q7s are running typical mileage for their age, so high wear isn't the culprit behind the poor pass rate—this looks like a model-specific reliability concern rather than a high-mileage problem. Before buying, have a pre-purchase inspection focus on the common failure triggers for this generation, and budget for potentially needing repairs before the next MOT.
What to check before buying a 2018 Audi Q7 S Line TDI Quattro Auto
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Audi Q7 S Line TDI Quattro Auto
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (100%) | 275 | 62.3% | 0.2 |
| Gas Bi-Fuel (0%) | 1 | 60% | 2 |
Mileage Distribution
Most 2018 Audi Q7 S Line TDI Quattro Auto vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2018 Audi Q7 S Line TDI Quattro Auto vehicles fall between 54,911 and 79,735 miles.
2018 Audi Q7 S Line TDI Quattro Auto — Still on the Road
82 vehicles still getting MOTs in 2025 — 60% of the peak remain.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2022–2025.
MOT History Averages
Found a specific Audi Q7 S Line TDI Quattro Auto?
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