SYM Crox 125 E4 vs Honda PCX 125

The Honda PCX 125 passes its MOT first time more often than the SYM Crox 125 E4: 81.1% vs 77.2%, a 3.9-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	SYM Crox 125 E4	Honda PCX 125
First-time pass rate	77.2%	81.1%
Outright fail rate	17.2%	12.9%
Vs comparable bikes (age & mileage adjusted)	+2.4 pts	+8.2 pts
Engine size	125cc	125cc
Rank among all models	#4033 of 5428	#3358 of 5428
Median miles at test	6,132	16,405
MOT tests analysed	635	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

share of each bike's MOT tests that failed on the component · lower is better

Component	SYM Crox 125 E4	Honda PCX 125
Brakes	11.2%	6.7%
Lights & signalling	9.6%	3.9%
Tyres & wheels	4.9%	5.3%
Steering & suspension	3.8%	4.4%
Structure & body	1.9%	0.7%

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

first-time MOT pass rate in each calendar year both bikes were tested

Test year	SYM Crox 125 E4	Honda PCX 125
2021	84.4%	80.3%
2022	78.0%	80.3%
2023	69.6%	80.2%
2024	76.2%	80.9%
2025	83.0%	81.6%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	SYM Crox 125 E4	Honda PCX 125
0k-10k miles	79.7%	88.4%
10k-20k miles	71.9%	79.3%

Bands with fewer than 30 tests for either bike are left out.

SYM Crox 125 E4 vs Honda PCX 125 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the SYM Crox 125 E4 or the Honda PCX 125?

The Honda PCX 125 passes its MOT first time more often than the SYM Crox 125 E4: 81.1% vs 77.2%, a 3.9-point lead. Adjusted for age, mileage and test class, the Honda PCX 125 still comes out ahead: +2.4 points vs comparable bikes for the SYM Crox 125 E4, +8.2 for the Honda PCX 125. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the SYM Crox 125 E4 fail its MOT on most?

Brakes: 11.2% of SYM Crox 125 E4 MOT tests failed on it, then lights & signalling (9.6%).

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%).

SYM CROX 125 E4 77.2% pass · 635 tests HONDA PCX 125 81.1% pass · 88.6k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.