SYM JET 14 125 E4
Pass rate over time
The JET 14 125 E4's first-time pass rate has fallen 12.0 points since 2020, 85.2% to 73.2%.
Pass rate by mileage
A low-mileage JET 14 125 E4 passes first time 77.6% of the time; by 30k that's 68.9%.
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 JET 14 125 E4
| Component group | Share of defects | Defects | % of defects | vs all bikes |
|---|---|---|---|---|
| brakes |
|
222 | 35 | 2.4× |
| lamps and reflectors |
|
170 | 26.8 | 5.4× |
| tyres |
|
92 | 14.5 | 7.8× |
| steering |
|
44 | 6.9 | 5.2× |
| audible warning (Horn) |
|
42 | 6.6 | 14.7× |
| structure and attachments |
|
31 | 4.9 | 2.3× |
| suspension |
|
25 | 3.9 | 1.7× |
| Identification of the vehicle |
|
8 | 1.3 | 1.9× |
| wheels |
|
1 | 0.2 | 1.1× |
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 JET 14 125 E4 beats 0 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, HONDA Vision 110).
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 JET 14 125 E4.
Pass rate by registration year
Best year to buy used: 2017 (76.9% pass). Weakest: 2019 (71.1%).
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.
SYM JET 14 125 E4 FAQ
Is the SYM JET 14 125 E4 reliable?
The SYM JET 14 125 E4 is about average for its class: 73.8% of its 1,562 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4420 of 5426 models.
What does a JET 14 125 E4 fail its MOT on most?
brakes — 35% of all defects recorded against failed JET 14 125 E4 tests.
What is the best year of JET 14 125 E4 to buy used?
By first-time pass rate, 2017-registered examples do best (76.9%) and 2019 worst (71.1%). Condition and history still trump the year.
How many miles will a JET 14 125 E4 last?
The median JET 14 125 E4 shows 9,914 miles at test, and examples around 30k miles still pass 68.9% of the time — mileage alone rarely kills one.