Common problems

Ford Mustang common problems

What MOT testers find on the Ford Mustang: the parts that fail or get advisories most often at each age, against all cars of the same age. From 40,094 DVSA MOT tests taken 2022 to 2025.

MOT data updated 28 September 2026

At 6 years, the most tested age

Brakes fails per 100 MOTs (n=7,925)6.2

All cars at 6 years (n=10,382,720)3.5

Tyres advisories and minor defects per 100 MOTs (n=7,925)18.5

All cars, same age (n=10,382,720)24.3

What stands out

Brakes fails show up on 6.2 of every 100 MOTs of a Ford Mustang at 6 years old (n=7,925), against 3.5 for all cars of that age (n=10,382,720).
Lights and electrics fails are less common: 2.0 per 100 MOTs against 4.7 for all cars at the same age.
The fail item testers record most often at 6 years: handbrake too weak, on 3.0 per 100 MOTs (all cars 0.2).
The most common advisory or minor defect: tread depth: worn close to legal limit/worn on edge, on 12.7 per 100 MOTs.

Problems by part at 6 years

How many of every 100 MOTs found a fail, or an advisory or minor defect, in each area. A test with faults in two areas counts in both.

Ford Mustang at 6 years (n=7,925) against all cars at 6 years (n=10,382,720). Per 100 MOTs.
Area	Fails	All cars	Advisories	All cars
Brakes	6.2	3.5	8.5	16.9
Tyres	5.1	5.6	18.5	24.3
Windscreen, wipers and mirrors	3.7	3.3	2.1	3.1
Suspension	2.2	2.9	3.4	6.1
Lights and electrics	2.0	4.7	0.6	1.9
Exhaust, emissions and leaks	1.1	1.3	1.2	1.2
Number plates and VIN	0.7	0.2	0.4	1.0
Seat belts and airbags	0.3	0.4	0.1	0.2
Body and structure	0.2	0.8	0.8	1.2
Steering	0.2	0.5	0.4	0.8
Road wheels	0.1	0.2	0.3	0.6

What testers fail most on the Mustang at 6 years

Fail items on the Ford Mustang at 6 years (n=7,925), per 100 MOTs, with all cars at the same age (n=10,382,720).
Item	Area	Per 100 MOTs	All cars	Typical repair (estimate)
Handbrake too weak	Brakes	3.0	0.2
Wipers not clearing screen	Windscreen, wipers and mirrors	2.2	1.8	£15 to £30 per blade
Parking brake performance: inoperative on one side	Brakes	2.0	0.1
Tyre with cords exposed	Tyres	1.9	1.0	£88 to £145 per tyre
Rbt (sp): efficiency less than 50% of the required value	Brakes	1.6	0.1
Tyre tread below 1.6 mm	Tyres	1.6	2.0	£88 to £145 per tyre
Suspension ball joint worn	Suspension	1.2	0.4	£75 to £237 per side (rough guide)
Washers: provides insufficient washer liquid	Windscreen, wipers and mirrors	1.1	0.9	£2 to £14 per car (rough guide)
Parking brake control lever: has excessive movement indicating incorrect adjustment	Brakes	0.7	0.1	£23 to £306 per car (rough guide)
Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords	Tyres	0.6	1.4	£88 to £145 per tyre

Early warnings: advisories and minor defects at 6 years

Advisories and minor defects are recorded, but the car still passes. Across all cars, a part with an advisory or minor defect failed at the next MOT 5.5 times in 100 (n=88,666,940 pairs of consecutive MOTs), against 0.3 times in 100 when the same part had none (n=12,936,860,350).

Advisories and minor defects on the Ford Mustang at 6 years (n=7,925), per 100 MOTs, with all cars at the same age (n=10,382,720).
Item	Area	Per 100 MOTs	All cars	If it needs replacing (estimate)
Tread depth: worn close to legal limit/worn on edge	Tyres	12.7	14.3	£88 to £145 per tyre
Tyre condition: slightly damaged/cracking or perishing	Tyres	5.0	9.2	£88 to £145 per tyre
Brake discs: worn, pitted or scored, but not seriously weakened	Brakes	4.3	7.3	£148 to £376 per axle (rough guide)
Brake pads: wearing thin	Brakes	3.6	9.3	£72 to £174 per axle (rough guide)
Nail in tyre	Other	1.5	2.0
Tread depth: worn close to legal limit/worn on edge	Tyres	1.5	2.0	£88 to £145 per tyre
Tyre condition: has a cut but not deep enough to reach the ply or cords	Tyres	1.3	1.6	£88 to £145 per tyre
Wheel bearings: has slight play	Suspension	1.2	0.1	£103 to £276 per wheel (rough guide)
Suspension arm ball joint: ball joint has slight play	Suspension	1.0	0.5	£75 to £237 per side (rough guide)
Windscreen: damaged but not adversely affecting driver's view	Windscreen, wipers and mirrors	1.0	1.8

Repair estimates are a guide for an independent garage: labour at the national median local garage rate (median £78 an hour from 65 garages, ONS price quotes) times estimated labour hours, plus a parts band. Labour hours and most parts bands are estimates, not quotes, and prices vary by model, engine and region. A warning light fault shows the cost of the diagnosis only.

How problems change with age

Fails per 100 MOTs in the three most common areas at 6 years. Ages with fewer than 1,000 tests are not shown.
Age	Tests (n)	Brakes	Tyres	Windscreen, wipers and mirrors
3 years	3,477	1.8	5.6	2.2
4 years	5,022	2.8	5.6	3.8
5 years	6,404	4.7	5.3	4.0
6 years	7,925	6.2	5.1	3.7
7 years	7,015	7.0	5.0	3.8
8 years	4,965	6.9	4.7	4.3
9 years	3,112	6.3	4.6	3.7
17 years	1,151	5.9	1.7	1.1
18 years	1,023	6.1	0.9	2.2

Mileage

At 6 years, Ford Mustang cars showing under 30,000 miles failed 12.7% of MOTs (n=4,728); the band that failed most, 30,000 to 60,000 miles, failed 21.5% (n=2,796). For pass and fail rates by age, see Ford Mustang MOT fail rates.

What to check on a viewing

On the Ford Mustang, testers most often record handbrake too weak; wipers not clearing screen; parking brake performance: inoperative on one side. Look at these first, then the areas below.

Brakes

On the test drive the car should stop in a straight line without pulling, juddering or grinding.
Look at the discs through the wheels for a deep lip, heavy rust or scoring.
Check that the handbrake or electronic parking brake holds the car on a slope.
Ask when the pads, discs and brake fluid were last changed, and for the receipts.

Tyres

Check the tread across the full width of all four tyres, and the spare if there is one.
Look for cuts, bulges and cracking in the sidewalls.
Wear on one edge only can point to worn suspension or the tracking being out.

Windscreen, wipers and mirrors

Look for chips or cracks in the windscreen, above all in front of the driver.
Run the wipers and washers: they should clear the screen without smearing.
Check that the mirrors are present, secure and not cracked.

Ask for the car's MOT history and service record: advisories that repeat from one year to the next show what has been left. GOV.UK MOT history.

Questions

What are the most common problems on the Ford Mustang?

At 6 years, the age with the most MOT tests (7,925), the fail items testers record most often on the Ford Mustang are handbrake too weak (3.0 per 100 MOTs), wipers not clearing screen (2.2 per 100 MOTs), parking brake performance: inoperative on one side (2.0 per 100 MOTs). The most common advisories or minor defects are tread depth: worn close to legal limit/worn on edge (12.7) and tyre condition: slightly damaged/cracking or perishing (5.0).

Which parts of the Ford Mustang fail more often than on other cars?

At 6 years: brakes (6.2 per 100 MOTs against 3.5 for all cars). Compared with 10,382,720 MOTs of all cars the same age.

Ford Mustang problems by area

Other Ford models

All Ford models · Common problems by make

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

The all cars figures cover all class 4 vehicles (cars and light vans) tested at the same age.

Looking at a Ford Mustang?

These figures describe the model, not the car in front of you. Found one you might buy? See what the VetTheCar Buying Report covers, or use the tools that work without a registration.

See a sample report Car tools · MOT fail rates by model · Compare models by MOT record

Repair estimates: ONS consumer price quotes for local garage labour (09/2025 to 08/2026), the MOT inspection manual for defect wording, and estimated labour hours and parts bands. Not affiliated with or endorsed by ONS.

Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.

Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources