Mz RT125 Reliability, MOT Pass Rate & Common Faults
Free Mz RT125 car check
Is the Mz RT125 reliable? We analysed 1,015 real MOT tests across 138 vehicles to find out.
Got a specific Mz RT125? Enter the reg for a free check:
The Mz RT125 is above average for reliability based on real UK MOT data. Common problems include stop lamp does not illuminate immediately a brake applies, shock absorber seal failed and leaking oil and drive chain sprocket worn to excess. Here's everything you need to know before buying a used Mz RT125.
Mz RT125 Number Plates
Number plates registered to a Mz RT125. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Mz RT125 MOT Pass Rate by Year
How likely is a Mz RT125 to pass its MOT? Here's the pass rate for each registration year, newest first.
Mz RT125 Problems — What Goes Wrong?
The most common reasons a Mz RT125 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Mz RT125 Mileage — What's Normal?
How many miles does a typical Mz RT125 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Mz RT125 MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Mz RT125 year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2005 | 167 | 83.8% | 4,696 | 7,159 | 13,600 |
| 2004 | 184 | 67.9% | 7,519 | 13,003 | 18,158 |
| 2003 | 229 | 73.4% | 6,224 | 12,997 | 19,768 |
| 2002 | 172 | 79.7% | 4,827 | 6,866 | 14,002 |
| 2001 | 159 | 76.1% | 4,664 | 8,127 | 11,832 |
How Long Does a Mz RT125 Last?
Based on 138 Mz RT125 vehicles on UK roads.
Mz RT125 Mileage Distribution
Total mileage recorded across all Mz RT125 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 Mz RT125
Based on MOT pass rates across all registration years with sufficient test data.
83.8% MOT pass rate from 167 tests
67.9% MOT pass rate from 184 tests
The best year to buy a used Mz RT125 is 2005, which has the highest MOT pass rate at 83.8% across 167 tests. The 2004 model year has the lowest pass rate at 67.9% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Mz RT125 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Mz RT125 THIS CAR | 76.0% | 1,015 | 9,963 mi | 25 yrs |
| Mz Baghira | 83.4% | 3,293 | 15,070 mi | 26 yrs |
| Mz ETZ250 | 88.2% | 2,739 | 26,583 mi | 45 yrs |
| Mz Skorpion | 84.4% | 1,952 | 24,117 mi | 32 yrs |
| Volvo S40 Sport D | 75.4% | 487 | 143,308 mi | — yrs |
Compared to the Mz Baghira (83.4% pass rate) and the Mz ETZ250 (88.2% pass rate), the Mz RT125 trails behind on MOT reliability.
Found a Mz RT125 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 Mz RT125Should you buy a used Mz RT125?
The Mz RT125 has an overall MOT pass rate of 76.0% across 1,015 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Mz RT125 are stop lamp does not illuminate immediately a brake applies (30 recorded failures), shock absorber seal failed and leaking oil (25), and drive chain sprocket worn to excess (25). 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 Mz RT125 owner drives around 759 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 Mz RT125 models stay on UK roads for around 25 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.