Data as of: DVSA MOT results to 2025
SYM Symphony vs Honda PCX 125
The Honda PCX 125 passes its MOT first time more often than the SYM Symphony: 81.1% vs 79.5%, a 1.6-point lead.
MOT reliability, side by side
| Metric | SYM Symphony | Honda PCX 125 |
|---|---|---|
| First-time pass rate | 79.5% | 81.1% |
| Outright fail rate | 13.5% | 12.9% |
| Vs comparable bikes (age & mileage adjusted) | +7.0 pts | +8.2 pts |
| Engine size | 125cc | 125cc |
| Rank among all models | #3687 of 5428 | #3358 of 5428 |
| Median miles at test | 9,184 | 16,405 |
| MOT tests analysed | 840 | 88,608 |
| Most common failure | brakes | brakes |
First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.
"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.
What fails, side by side
| Component | SYM Symphony | Honda PCX 125 |
|---|---|---|
| Brakes | 5.6% | 6.7% |
| Lights & signalling | 6.4% | 3.9% |
| Steering & suspension | 4.9% | 4.4% |
| Tyres & wheels | 3.9% | 5.3% |
| Structure & body | 1.3% | 0.7% |
| Fuel & exhaust | 0.1% | 0.0% |
A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.
Pass rate by test year
| Test year | SYM Symphony | Honda PCX 125 |
|---|---|---|
| 2018 | 81.0% | 81.2% |
| 2019 | 77.1% | 79.9% |
| 2020 | 81.4% | 82.3% |
| 2021 | 80.7% | 80.3% |
| 2022 | 78.6% | 80.3% |
| 2023 | 75.3% | 80.2% |
| 2024 | 72.5% | 80.9% |
| 2025 | 95.9% | 81.6% |
Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.
Pass rate by mileage
| Mileage | SYM Symphony | Honda PCX 125 |
|---|---|---|
| 0k-10k miles | 82.9% | 88.4% |
| 10k-20k miles | 76.3% | 79.3% |
| 20k-30k miles | 71.8% | 78.0% |
| 30k-40k miles | 79.5% | 77.0% |
Bands with fewer than 30 tests for either bike are left out.
SYM Symphony vs Honda PCX 125 FAQ
Which is more reliable, the SYM Symphony or the Honda PCX 125?
The Honda PCX 125 passes its MOT first time more often than the SYM Symphony: 81.1% vs 79.5%, a 1.6-point lead. Adjusted for age, mileage and test class, the Honda PCX 125 still comes out ahead: +7.0 points vs comparable bikes for the SYM Symphony, +8.2 for the Honda PCX 125. An MOT checks roadworthiness items, not engine or gearbox internals.
What does the SYM Symphony fail its MOT on most?
Lights & signalling: 6.4% of SYM Symphony MOT tests failed on it, then brakes (5.6%).
What does the Honda PCX 125 fail its MOT on most?
Brakes: 6.7% of Honda PCX 125 MOT tests failed on it, then tyres & wheels (5.3%).
Which holds up better at high mileage, the SYM Symphony or the Honda PCX 125?
At 30k-40k miles the SYM Symphony passes first time more often: 79.5% for the SYM Symphony vs 77.0% for the Honda PCX 125.
See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.