The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.
Pass rate over time
The G3's first-time pass rate has risen 7.9 points since 2006, 90.2% to 98.1%.
Pass rate by mileage
A low-mileage G3 passes first time 90.9% of the time; by 50k that's 93.1%.
First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.
What fails on a G3
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| steering and suspension |
|
23 | 38.3 | 0.3× |
| lighting and signalling |
|
20 | 33.3 | 0.2× |
| brakes |
|
8 | 13.3 | 0.1× |
| tyres and wheels |
|
3 | 5 | 0.1× |
| fuel and exhaust |
|
2 | 3.3 | 0.2× |
| drive system |
|
2 | 3.3 | 0.1× |
| reg plates and vin |
|
1 | 1.7 | 0.1× |
| Items Not Tested |
|
1 | 1.7 | 0.7× |
Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.
How rivals compare
On first-time pass rate the G3 beats 4 of its 4 closest rivals (SUZUKI AN400, SUZUKI DR-Z400S, YAMAHA RD350).
Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the G3.
Compare with any bike
More MATCHLESS models
Pass rate by registration year
Best year to buy used: 1962 (96.3% pass). Weakest: 1963 (89.9%).
First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.
MATCHLESS G3 FAQ
Is the MATCHLESS G3 reliable?
The MATCHLESS G3 is more reliable than average for its class: 92.7% of its 1,459 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #344 of 5428 models.
What does a G3 fail its MOT on most?
steering and suspension — 38% of all defects recorded against failed G3 tests.
What is the best year of G3 to buy used?
By first-time pass rate, 1962-registered examples do best (96.3%) and 1963 worst (89.9%). Condition and history still trump the year.
How many miles will a G3 last?
The median G3 shows 18,738 miles at test, and examples around 50k miles still pass 93.1% of the time — mileage alone rarely kills one.
Embed this bike
Free to embed on your site, blog or forum — a live Matchless G3 reliability card that stays up to date and links back here. More on the free API page.