Mazda 121 Gxi Reliability, MOT Pass Rate & Common Faults
Free Mazda 121 Gxi car check
Is the Mazda 121 Gxi reliable? We analysed 1,086 real MOT tests across 201 vehicles to find out.
Got a specific Mazda 121 Gxi? Enter the reg for a free check:
The Mazda 121 Gxi is below average for reliability based on real UK MOT data. Common problems include brake pipe excessively corroded, parking brake: efficiency below requirements and tyre tread depth below requirements of 1.6mm. Here's everything you need to know before buying a used Mazda 121 Gxi.
Mazda 121 Gxi Number Plates
Number plates registered to a Mazda 121 Gxi. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Mazda 121 Gxi MOT Pass Rate by Year
How likely is a Mazda 121 Gxi to pass its MOT? Here's the pass rate for each registration year, newest first.
Mazda 121 Gxi Problems — What Goes Wrong?
The most common reasons a Mazda 121 Gxi fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Mazda 121 Gxi Mileage — What's Normal?
How many miles does a typical Mazda 121 Gxi owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Mazda 121 Gxi MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Mazda 121 Gxi year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 1999 | 101 | 64.4% | 43,464 | 55,155 | 70,838 |
| 1998 | 218 | 61.5% | 55,488 | 68,960 | 81,780 |
| 1997 | 181 | 62.4% | 35,424 | 56,044 | 73,789 |
| 1996 | 551 | 57.2% | 47,624 | 66,051 | 82,036 |
How Long Does a Mazda 121 Gxi Last?
Based on 201 Mazda 121 Gxi vehicles on UK roads.
Mazda 121 Gxi Mileage Distribution
Total mileage recorded across all Mazda 121 Gxi MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Mazda 121 Gxi
Based on MOT pass rates across all registration years with sufficient test data.
64.4% MOT pass rate from 101 tests
57.2% MOT pass rate from 551 tests
The best year to buy a used Mazda 121 Gxi is 1999, which has the highest MOT pass rate at 64.4% across 101 tests. The 1996 model year has the lowest pass rate at 57.2% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Mazda 121 Gxi Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Mazda 121 Gxi THIS CAR | 59.6% | 1,086 | 64,724 mi | 30 yrs |
| Mazda MX-5 | 76.5% | 2,502,760 | 63,190 mi | 36 yrs |
| Mazda 3 | 77.5% | 2,040,939 | 61,041 mi | 22 yrs |
| Mazda 6 | 75.4% | 1,904,140 | 77,387 mi | 24 yrs |
| Mv Agusta F4 1000 | 89.2% | 1,451 | 6,800 mi | 22 yrs |
Compared to the Mazda MX-5 (76.5% pass rate) and the Mazda 3 (77.5% pass rate), the Mazda 121 Gxi trails behind on MOT reliability.
Found a Mazda 121 Gxi you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Mazda 121 GxiShould you buy a used Mazda 121 Gxi?
The Mazda 121 Gxi has an overall MOT pass rate of 59.6% across 1,086 real MOT tests — below the UK average, so reliability should be a key concern.
The most common problems on the Mazda 121 Gxi are brake pipe excessively corroded (159 recorded failures), parking brake: efficiency below requirements (93), and tyre tread depth below requirements of 1.6mm (90). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Mazda 121 Gxi owner drives around 6,290 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Mazda 121 Gxi models stay on UK roads for around 30 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.