Mazda 323 MOT pass rate & common failures
11,566 MOT tests on the Mazda 323 (1981–2021) give it a 70.4% pass rate. All cars of a similar age fail 26.1% of the time, so this is 3.5pp worse than the group it competes with. Its most common failure areas are suspension, lighting & signalling and brakes.
Best and worst 323 years
Ranked across 323 years with at least 1,000 tests. Older cars fail more simply because they are older — compare years close together in age before drawing conclusions.
What the MOT record shows
The strongest year on this record is 2000 (71.5% pass rate); the weakest is 2003 (68.1%). Older cars carry more of the difference than the average implies.
Suspension dominates the failure mix at 16.0% of all tests — 4.0 points clear of lighting & signalling, so it is the first thing to check.
At component level the recurring items are component mounting prescribed areas, prescribed areas and headlamp aim — component mounting prescribed areas alone was recorded 1,867 times.
A 150k+ example is materially riskier than a 0-30k one: 33.6% versus 15.6%.
Advisories point at the next bill rather than this one: suspension was flagged on 40.9% of tests without failing them.
The trend is improving — the fail rate fell from 30.2% in 2021 to 27.5% in 2025, as the worst-kept examples leave the fleet.
How it compares
By model year
Every 323 model year with a usable sample. Years with their own detailed report are linked.
| Year | Tests | Pass rate | Fail rate | Most common failure |
|---|---|---|---|---|
| 1984 | 42 | 69.0% | 30.9% | Suspension |
| 1986 | 75 | 84.0% | 16.0% | Body, structure & corrosion |
| 1987 | 113 | 75.2% | 24.8% | Lighting & signalling |
| 1988 | 141 | 74.5% | 25.5% | Brakes |
| 1989 | 121 | 76.0% | 24.0% | Brakes |
| 1990 | 116 | 75.9% | 24.1% | Suspension |
| 1991 | 210 | 72.4% | 27.6% | Suspension |
| 1992 | 149 | 75.2% | 24.8% | Suspension |
| 1993 | 205 | 69.8% | 30.2% | Suspension |
| 1994 | 266 | 71.0% | 28.9% | Suspension |
| 1995 | 177 | 72.3% | 27.7% | Body, structure & corrosion |
| 1996 | 331 | 72.8% | 27.2% | Suspension |
| 1997 | 874 | 70.4% | 29.6% | Suspension |
| 1998 | 1,194 | 69.5% | 30.5% | Suspension |
| 1999 | 1,266 | 71.0% | 29.0% | Suspension |
| 2000 | 1,184 | 71.5% | 28.5% | Suspension |
| 2001 | 1,235 | 70.9% | 29.1% | Suspension |
| 2002 | 1,667 | 69.1% | 30.9% | Suspension |
| 2003 | 2,016 | 68.1% | 31.9% | Suspension |
| 2004 | 37 | 59.5% | 40.5% | Suspension |
| 2009 | 31 | 67.7% | 32.3% | Suspension |
Most common failures (all years)
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Suspension | 16.0% | 1,847 |
| 2 | Lighting & signalling | 12.0% | 1,388 |
| 3 | Brakes | 11.8% | 1,359 |
| 4 | Body, structure & corrosion | 8.1% | 942 |
| 5 | Visibility | 5.7% | 655 |
| 6 | Emissions & environmental | 5.6% | 646 |
| 7 | Tyres | 5.0% | 575 |
| 8 | Seat belts & restraints | 3.7% | 431 |
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 | 1,867 |
| 2 | Prescribed areas | 580 |
| 3 | Headlamp aim | 552 |
| 4 | Wipers | 535 |
| 5 | Catalyst emissions | 531 |
| 6 | Service brake performance | 530 |
| 7 | Integral vehicle structure condition | 442 |
| 8 | Headlamp | 409 |
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 | 40.9% | 4,726 |
| 2 | Brakes | 30.1% | 3,480 |
| 3 | Tyres | 26.4% | 3,055 |
| 4 | Body, structure & corrosion | 18.8% | 2,169 |
| 5 | Emissions & environmental | 16.8% | 1,948 |
| 6 | Other defects | 13.3% | 1,532 |
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 | 334 | 15.6% |
| 30-60k | 2,598 | 24.6% |
| 60-90k | 4,311 | 30.0% |
| 90-120k | 2,710 | 32.9% |
| 120-150k | 1,175 | 34.1% |
| 150k+ | 431 | 33.6% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 11,388 | 29.5% |
| Diesel | 178 | 37.1% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 3,560 | 30.2% |
| 2022 | 2,814 | 30.7% |
| 2023 | 2,163 | 29.1% |
| 2024 | 1,685 | 28.8% |
| 2025 | 1,344 | 27.5% |
What to check before buying a Mazda 323
- Suspension (16.0% 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.
- Lighting & signalling (12.0% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (11.8% 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
What is the MOT pass rate for the Mazda 323?
70.4% of the 11,566 Mazda 323 MOT tests in this dataset passed, a 29.6% fail rate, across model years 1981–2021.
What does the Mazda 323 most often fail its MOT on?
Suspension, recorded in 16.0% of tests, then lighting & signalling (12.0%).
Which 323 years are best and worst for MOT results?
2000 has the best pass rate at 71.5% and 2003 the weakest at 68.1%, from 1,184 and 2,016 tests respectively.
How much does mileage affect 323 MOT results?
Fail rates run at 15.6% for cars in the 0-30k band and 33.6% for 150k+, a 18.1-point difference.
Methodology & source. Based on 11,566 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.