Audi A4 (2005)
2005 Audi A4
CarHunch analysed 32,349 real MOT records for the 2005 Audi A4. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2005 Audi A4 passes its MOT at 78.4%, slightly below the UK average of 80%, and a significant concern is that 33.9% of these vehicles have recorded dangerous defects—well above what you'd typically see. Petrol and diesel variants perform nearly identically, both around 78%, so fuel choice won't meaningfully affect your reliability odds here.
These cars are running at 100,000 miles on average with a median of 106,000, which is exactly what you'd expect for their age, but they're racking up 3.67 failures and 20.2 advisories per test cycle—suggesting wear and ageing components are catching up. Before buying, get a pre-purchase inspection focused on suspension, brakes, and cooling system work, as high advisory counts on older Audis typically point to these areas needing attention sooner rather than later.
What to check before buying a 2005 Audi A4
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.
- ⚠️ 33.9% 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 A4
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 |
|---|---|---|---|
| Diesel (68%) | 22,088 | 78.6% | 3.52 |
| Petrol (32%) | 10,244 | 78.1% | 4 |
| LPG (0%) | 7 | 78% | 3.71 |
| Other (0%) | 5 | 55.3% | 1.2 |
| Electric (0%) | 3 | 90.2% | 1.67 |
| Gas Bi-Fuel (0%) | 1 | 73.7% | 5 |
| Steam (0%) | 1 | 80% | 3 |
Mileage Distribution
Most 2005 Audi A4 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 2005 Audi A4 vehicles fall between 86,210 and 127,790 miles.
2005 Audi A4 — Still on the Road
Numbers are declining — 5,432 vehicles still getting MOTs in 2025 (20% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
MOT History Averages
Most Common MOT Issues — 2005 Audi A4
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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78.3%
Nearside Front Tyre worn close to the legal limit
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74.1%
Offside Front Tyre worn close to the legal limit
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62.9%
Nearside Rear Tyre worn close to the legal limit
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59.4%
Under-trays fitted obscuring some underside components
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59%
Offside Rear Tyre worn close to the legal limit
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44.4%
Oil leak, but not excessive
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39.8%
Engine covers fitted obscuring some components in the engine bay
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30.5%
Nearside Front Tyre worn close to legal limit/worn on edge
Data covers a 3-year window centred on 2005. Counts include advisories and failures.
Found a specific Audi A4?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.