Seat Leon (2017)
2017 Seat Leon
CarHunch analysed 18,595 real MOT records for the 2017 Seat Leon. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2017 SEAT LEON passes its MOT on first attempt in 87.9% of cases, well above the UK average of 80%, suggesting this is a fundamentally reliable car. However, 30.5% of vehicles have recorded a dangerous defect at some point, which is notably high and worth treating as a serious buyer concern—you'll want a pre-purchase inspection and full service history.
At a median mileage of 43,457 miles, these cars are running lower than you'd expect for a seven-year-old model, indicating gentle use overall. The average vehicle racks up 0.97 failures and 8.2 advisories per test, pointing to minor wear items rather than structural problems—when shopping, prioritise a recent full service record and ask the seller specifically about suspension, brakes, and electrical gremlins, which typically dominate the advisory list for this generation.
What to check before buying a 2017 Seat Leon
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.
- ⚠️ 30.5% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 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 Seat Leon
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (67%) | 12,446 | 88.4% | 0.94 |
| Diesel (33%) | 6,148 | 87.1% | 1.05 |
| Diesel (0%) | 1 | 100% | 0 |
Mileage Distribution
Most 2017 Seat Leon 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 2017 Seat Leon vehicles fall between 34,003 and 54,367 miles.
2017 Seat Leon — Still on the Road
Strong survival — 17,395 vehicles still getting MOTs in 2025, 97% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2020–2025.
MOT History Averages
Most Common MOT Issues — 2017 Seat Leon
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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49.3%
Nearside Front Shock absorbers has light misting of oil
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42.4%
Offside Front Tyre worn close to legal limit/worn on edge
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41%
Nearside Front Tyre worn close to legal limit/worn on edge
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31.8%
Offside Front Shock absorbers has light misting of oil
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29.6%
Rear Brake pad(s) wearing thin
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28.2%
Offside Rear Shock absorbers has light misting of oil
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27%
Offside Rear Tyre slightly damaged/cracking or perishing
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25.2%
Nearside Rear Tyre slightly damaged/cracking or perishing
Data covers a 3-year window centred on 2017. Counts include advisories and failures.
Found a specific Seat Leon?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.