1998 Mazda 323 — MOT failures & pass rate
1,194 MOT tests on the 1998 Mazda 323 are in this dataset, and 69.5% of them passed. Against all cars of a similar age (25.7% fail rate), the 1998 323 comes out 4.8pp worse. Failures cluster in suspension, brakes and body, structure & corrosion.
What the MOT record shows
No single area dominates — suspension (14.2%) and brakes (12.5%) are close, so failures are spread across several systems rather than one weak point.
At component level the recurring items are component mounting prescribed areas, catalyst emissions and service brake performance — component mounting prescribed areas alone was recorded 123 times.
Mileage is the strongest signal on the record: 19.4% of 30-60k cars fail, rising to 35.0% once past 150k.
Suspension is the most common advisory, noted on 41.5% of tests — work that passed today but is likely due soon.
The trend is worsening — 29.9% of tests failed in 2021 against 32.9% in 2025, the usual pattern as a fleet ages.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 14.2% | 170 |
| 2 | Brakes | 12.5% | 149 |
| 3 | Body, structure & corrosion | 12.2% | 146 |
| 4 | Lighting & signalling | 11.4% | 136 |
| 5 | Emissions & environmental | 6.9% | 82 |
| 6 | Visibility | 5.1% | 61 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Component mounting prescribed areas | 123 |
| 2 | Catalyst emissions | 110 |
| 3 | Service brake performance | 89 |
| 4 | Joints | 82 |
| 5 | Prescribed areas | 77 |
| 6 | Integral vehicle structure condition | 53 |
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 | 41.5% | 496 |
| 2 | Brakes | 34.0% | 406 |
| 3 | Body, structure & corrosion | 29.0% | 346 |
| 4 | Tyres | 25.9% | 309 |
| 5 | Emissions & environmental | 16.6% | 198 |
| 6 | Other defects | 15.8% | 188 |
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 | 155 | 19.4% |
| 60-90k | 396 | 29.5% |
| 90-120k | 343 | 33.5% |
| 120-150k | 202 | 36.1% |
| 150k+ | 80 | 35.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 345 | 29.9% |
| 2022 | 284 | 30.3% |
| 2023 | 231 | 31.2% |
| 2024 | 176 | 29.0% |
| 2025 | 158 | 32.9% |
What to check before buying a 1998 323
The failure pattern for this year is specific enough to inspect against: suspension accounted for 14.2% of tests. Start there.
- Suspension (14.2% 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 (12.5% 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 (12.2% 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 1998 Mazda 323s pass their MOT?
69.5% of the 1,194 1998 Mazda 323 MOT tests in this dataset passed — a 30.5% fail rate.
What is the most common MOT failure on a 1998 Mazda 323?
Suspension, recorded in 14.2% of tests, followed by brakes (12.5%).
Does the 1998 323 get worse with mileage?
Its MOT fail rate rises from 19.4% in the 30-60k band to 35.0% in the 150k+ band.
Methodology & source. Based on 1,194 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.