Mercedes-Benz X MOT pass rate: 84.2% (3,664 tests, 2025)

The Mercedes-Benz X passed 84.2% of its 3,664 MOT tests in 2025 — 6.7 points above the UK average of 77.5%. The median tested example was 6 years old with 63,722 miles on the clock.

84.2%Pass rate (2025)

3,664MOT tests analysed

63,722 miMedian mileage at test

6 yrsMedian age at test

How the X compares

Mercedes-Benz X

84.2%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Mercedes-Benz average (all models)

80.7%

What fails most on the Mercedes-Benz X

Across failed and rectified tests in 2025, these vehicle systems produced the most defects on the X:

#	System	Defects recorded	Share
1	Brakes	246	21.4%
2	Tyres	208	18.1%
3	Lamps, reflectors and electrical equipment	190	16.6%
4	Noise, emissions and leaks	145	12.6%
5	Seat belts and supplementary restraint systems	104	9.1%
6	Visibility	96	8.4%

Pre-MOT checklist for X owners

Based on the failure profile above, ten minutes with a torch before your test removes the most likely fail items:

Feel for a spongy pedal or pulling to one side; check pad wear through the wheel spokes if visible
Check tread with the 20p test and inspect sidewalls for cracking — tyres close to the limit are the country’s most common advisory
Walk round with all lights on: one blown bulb is the most avoidable fail there is
A blowing exhaust or visible smoke will fail; warm the engine fully before the test
Pull every belt sharply to confirm it locks, and check for cuts and fraying

Check the engine before the tester does

A stored fault code with the engine light on is an automatic Major defect. Scan and clear resolved faults before booking.

Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
Autel UK testersAutel professional-grade diagnostic testers

X pass rate by registration year

Registration year	Tests	Pass rate	Vs same-age	Median mileage
2018	3,798	82.2%	-4.2 pts	62,992
2019	4,772	83.7%	-4.7 pts	52,818
2020	1,905	86.2%	-3.6 pts	42,346

Check a specific X before you buy

Pass rates describe the model; they can’t tell you about the one car you’re looking at. Run its plate through our free MOT history check to see its personal record of failures, advisories and mileage readings.

Other Mercedes-Benz models

C78.2% pass rate · 343,551 tests A-Class77.8% pass rate · 232,671 tests E79.7% pass rate · 215,896 tests A89.1% pass rate · 93,733 tests Vito73.4% pass rate · 81,263 tests GLC87.2% pass rate · 65,847 tests GLA83.1% pass rate · 64,404 tests CLA82.7% pass rate · 62,279 tests

FAQs

What is the MOT pass rate for a Mercedes-Benz X?

In 2025, 84.2% of 3,664 first MOT tests on the Mercedes-Benz X were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the X fail its MOT on most?

The biggest defect group is brakes (21.4% of its recorded defects), followed by tyres.

Is the Mercedes-Benz X reliable?

MOT pass rate is one lens on durability: at 84.2% it performs above the national average at a median age of 6 years and 63,722 miles. Always check the individual car's history too.

Source: DVSA Anonymised MOT tests and results, 2025 extract (Class 4 initial tests only; retests excluded). Contains public sector information licensed under the Open Government Licence v3.0. Figures rounded to one decimal place.