Audi A3 (2018)
2018 Audi A3
CarHunch analysed 28,111 real MOT records for the 2018 Audi A3. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2018 Audi A3 passes its MOT first time in 88.2% of cases, well ahead of the UK average of 80%, which is a genuinely solid result—though nearly a quarter of examples have recorded a dangerous defect at some point, so thorough pre-purchase inspection matters. Petrol versions are slightly more reliable than diesel (88.6% vs 86.6% pass rate), and there's negligible difference with the hybrid variants.
At 36,591 miles median, these cars are running low for their age, which explains the manageable 0.6 average failures per test; the 4.5 advisories per vehicle suggest minor wear items crop up regularly, but nothing catastrophic. Check service history carefully and budget for routine maintenance on suspension and trim components—the A3 is fundamentally sound, but it's not bulletproof.
What to check before buying a 2018 Audi A3
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.
- ⚠️ 24.8% 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 Audi A3
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 (82%) | 22,999 | 88.6% | 0.58 |
| Diesel (16%) | 4,586 | 86.6% | 0.71 |
| Hybrid Electric (Clean) (2%) | 523 | 84% | 0.56 |
| Diesel (0%) | 1 | 100% | 0 |
| Other (0%) | 1 | 100% | 0 |
| Electric (0%) | 1 | 100% | 0 |
Mileage Distribution
Most 2018 Audi A3 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 A3 vehicles fall between 27,701 and 47,113 miles.
2018 Audi A3 — Still on the Road
Strong survival — 25,884 vehicles still getting MOTs in 2025, 98% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.
MOT History Averages
Most Common MOT Issues — 2018 Audi A3
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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38.9%
Offside Front Tyre worn close to legal limit/worn on edge
-
37.1%
Nearside Front Tyre worn close to legal limit/worn on edge
-
26.6%
Rear Brake pad(s) wearing thin
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21.6%
Nearside Rear Tyre worn close to legal limit/worn on edge
-
21.2%
Offside Rear Tyre slightly damaged/cracking or perishing
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19.3%
Offside Rear Tyre worn close to legal limit/worn on edge
-
19.3%
Nearside Rear Tyre slightly damaged/cracking or perishing
-
17.9%
Front Brake pad(s) wearing thin
Data covers a 3-year window centred on 2018. Counts include advisories and failures.
Found a specific Audi A3?
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