2006 Mg Zr+ — MOT failures & pass rate
Across 449 MOT tests analysed for the 2006 Mg Zr+, the most common recorded failure areas were lighting & signalling, brakes and body, structure & corrosion. Its pass rate of 74.2% was in line with the average for cars of a similar age (74.4%).
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 15.6% | 70 |
| 2 | Brakes | 8.2% | 37 |
| 3 | Body, structure & corrosion | 7.8% | 35 |
| 4 | Visibility | 6.9% | 31 |
| 5 | Emissions & environmental | 6.2% | 28 |
| 6 | Suspension | 6.0% | 27 |
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 | 44 |
| 2 | Wipers | 23 |
| 3 | Joints | 23 |
| 4 | Catalyst emissions | 20 |
| 5 | Position lamp | 17 |
| 6 | Exhaust system | 15 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 26.7% | 120 |
| 2 | Suspension | 25.4% | 114 |
| 3 | Lighting & signalling | 19.4% | 87 |
| 4 | Steering | 18.3% | 82 |
| 5 | Body, structure & corrosion | 17.6% | 79 |
| 6 | Brakes | 15.6% | 70 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 30-60k | 107 | 23.4% |
| 60-90k | 151 | 25.8% |
| 90-120k | 109 | 31.2% |
| 120-150k | 43 | 27.9% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 411 | 27.7% |
| Diesel | 38 | 5.3% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 134 | 28.4% |
| 2022 | 104 | 25.0% |
| 2023 | 89 | 25.8% |
| 2024 | 67 | 26.9% |
| 2025 | 55 | 20.0% |
What to check before buying a 2006 Zr+
Before buying a 2006 Mg Zr+, focus on the areas it most often fails on. Lighting & signalling accounted for 15.6% of tests for this year.
- Lighting & signalling (15.6% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (8.2% 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.
- Body, structure & corrosion (7.8% of tests): The one to take seriously on older cars — corrosion to structural areas can be costly and is an MOT failure. Typical repair: £200–£1,500+.
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 Mg Zr+s pass their MOT?
74.2% of the 449 2006 Mg Zr+ MOT tests in this dataset passed — a 25.8% fail rate.
What is the most common MOT failure on a 2006 Mg Zr+?
Lighting & signalling, recorded in 15.6% of tests, followed by brakes (8.2%).
Does the 2006 Zr+ get worse with mileage?
Its MOT fail rate rises from 23.4% in the 30-60k band to 27.9% in the 120-150k band.
Methodology & source. Based on 449 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.