2006 Audi A4 — MOT failures & pass rate
The 2006 Audi A4 passed 75.8% of its 96,827 recorded MOT tests. That is effectively the same as executive cars of a similar age (23.7% fail rate), so the MOT record here is unremarkable in either direction. Failures cluster in lighting & signalling, suspension and brakes.
What the MOT record shows
No single area dominates — lighting & signalling (13.2%) and suspension (10.6%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are headlamp aim, track rod end and ball joint dust cover — headlamp aim alone was recorded 7,433 times.
Condition tracks the odometer closely. Failures run at 13.1% in the 0-30k band and 26.5% in the 150k+ band, a 13.5-point spread — more than double.
The petrol cars hold up better: 22.4% fail against 25.4% for diesel, a 3.0-point gap across 96,817 tests.
Suspension is the most common advisory, noted on 36.4% of tests — work that passed today but is likely due soon.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 13.2% | 12,754 |
| 2 | Suspension | 10.6% | 10,305 |
| 3 | Brakes | 7.8% | 7,547 |
| 4 | Tyres | 7.1% | 6,856 |
| 5 | Emissions & environmental | 5.2% | 5,003 |
| 6 | Body, structure & corrosion | 4.9% | 4,731 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 7,433 |
| 2 | Track rod end | 4,951 |
| 3 | Ball joint dust cover | 4,519 |
| 4 | Coil spring | 3,789 |
| 5 | Joints | 3,671 |
| 6 | Tread depth | 3,664 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 36.4% | 35,209 |
| 2 | Brakes | 28.9% | 27,956 |
| 3 | Tyres | 28.8% | 27,926 |
| 4 | Emissions & environmental | 13.7% | 13,276 |
| 5 | Lighting & signalling | 13.6% | 13,188 |
| 6 | Other defects | 10.6% | 10,298 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 268 | 13.1% |
| 30-60k | 2,737 | 14.9% |
| 60-90k | 10,604 | 19.8% |
| 90-120k | 23,468 | 23.0% |
| 120-150k | 26,453 | 25.1% |
| 150k+ | 33,219 | 26.5% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Diesel | 58,862 | 25.4% |
| Petrol | 37,955 | 22.4% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 25,185 | 23.8% |
| 2022 | 22,669 | 23.9% |
| 2023 | 19,678 | 24.5% |
| 2024 | 16,260 | 24.8% |
| 2025 | 13,035 | 24.4% |
What to check before buying a 2006 A4
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 13.2% of tests. Start there.
- Lighting & signalling (13.2% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (10.6% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
- Brakes (7.8% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2006 Audi A4s pass their MOT?
75.8% of the 96,827 2006 Audi A4 MOT tests in this dataset passed — a 24.2% fail rate.
What is the most common MOT failure on a 2006 Audi A4?
Lighting & signalling, recorded in 13.2% of tests, followed by suspension (10.6%).
Does the 2006 A4 get worse with mileage?
Its MOT fail rate rises from 13.1% in the 0-30k band to 26.5% in the 150k+ band.
Methodology & source. Based on 96,827 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.