Ford Sierra MOT pass rate: 89.7% (2,174 tests, 2025)

The Ford Sierra passed 89.7% of its 2,174 MOT tests in 2025 — 12.2 points above the UK average of 77.5%. The median tested example was 36 years old with 52,460 miles on the clock.

89.7%Pass rate (2025)

2,174MOT tests analysed

52,460 miMedian mileage at test

36 yrsMedian age at test

How the Sierra compares

Ford Sierra

89.7%

UK average (all Class 4 vehicles)

77.5% across 33.1 million tests

Ford average (all models)

75.3%

What fails most on the Ford Sierra

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

#	System	Defects recorded	Share
1	Lamps, reflectors and electrical equipment	155	26.5%
2	Suspension	122	20.9%
3	Brakes	120	20.5%
4	Noise, emissions and leaks	94	16.1%
5	Body, chassis, structure	94	16.1%

Pre-MOT checklist for Sierra owners

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

Walk round with all lights on: one blown bulb is the most avoidable fail there is
Bounce each corner and listen for clonks over speed bumps — suspension is this model’s (and the UK’s) top failure system
Feel for a spongy pedal or pulling to one side; check pad wear through the wheel spokes if visible
A blowing exhaust or visible smoke will fail; warm the engine fully before the test
Look underneath for corrosion around sills and subframes, especially on older cars

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

Check a specific Sierra 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 Ford models

Fiesta71.7% pass rate · 1,279,795 tests Focus74.3% pass rate · 850,793 tests Transit68.9% pass rate · 275,334 tests Kuga81.7% pass rate · 248,991 tests Mondeo73.0% pass rate · 171,083 tests Ka72.1% pass rate · 168,504 tests Transit Connect73.2% pass rate · 157,376 tests Ranger77.4% pass rate · 121,272 tests

FAQs

What is the MOT pass rate for a Ford Sierra?

In 2025, 89.7% of 2,174 first MOT tests on the Ford Sierra were passes (UK average: 77.5%). Data: DVSA anonymised MOT results.

What does the Sierra fail its MOT on most?

The biggest defect group is lamps, reflectors and electrical equipment (26.5% of its recorded defects), followed by suspension.

Is the Ford Sierra reliable?

MOT pass rate is one lens on durability: at 89.7% it performs above the national average at a median age of 36 years and 52,460 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.