Fault File
All models / All cars / Coupés, convertibles & GT / Ford Mustang / Mach-E

Ford Mustang / Mach-E

All generations and engines together · 14,317 MOT tests in the 2025 data · typical mileage at age 7: 36k

Reliability verdict
DBy age
CBy miles

Graded against its peers

Worse than most coupés and convertibles for its age, and about average per mile driven. Watch brakes and suspension. A used buy worth some caution. Check the MOT history for repeating brakes advisories before you go.

First-time failure at age 7
16.8%
Across 1,855 tests. The average for coupés and convertibles is 14.8%.
First-time failure at 50-60k miles
18.6%
Across 1,271 tests. The average for coupés and convertibles is 17.9%.
Rank in its class
15 of 19
1 = lowest failure rate among the 19 coupés and convertibles we can rank.
Typical mileage at age 7
36k miles
How far the average car has gone by seven years old. Low-mileage models can look better by age than they are.

Generation

Split by first-registration year. Cars registered in a changeover year can belong to either generation.

What owners report

Reported

Owner folklore from forums and the motoring press, with how well each report stands up. Most of it never shows up in an MOT, which is why this section exists at all.

RWD Mach-E rear differential can fracture, killing drive

Confirmed pattern

A rear driveshaft/differential pinion shaft on rear-wheel-drive Mach-Es can fatigue and fracture, which can cause a sudden loss of drive or unexpected movement. Ford has recalled roughly 42,000-43,000 cars (2021-2023 model years, RWD only) over this, with the powertrain control module reflashed to limit torque until the part is replaced. Watch for any clunk from the back axle on full-throttle pulls or reversing.

2021-2023 RWD Mach-E · recall live 2026 · sources: Electrek, Autoblog, Autoevolution, InsideEVs, NBC Montana

Early Mach-Es can go flat and refuse to start after a charge

Confirmed pattern

Some early Mustang Mach-E owners found the car's conventional 12V battery drained flat after the main traction battery had finished charging, leaving the car unable to wake up or start next time. Ford addressed it with a software fix rather than a hardware recall. Worth asking a seller of an early (2020/2021) car whether they've had any "won't start" incidents and whether any update was applied.

Early (2020-2021) cars · fix was a software update · sources: Reuters (via Yahoo Finance)

Mach-E loss-of-drive-power software fault

Confirmed patternMach-E (AWD, 2021) only

Separately from the differential issue, Ford recalled around 2021-model Mach-E AWD cars for a functional-safety software bug that could fail to catch its own errors and cause unintended acceleration, deceleration or a total loss of drive power. It was fixed with an over-the-air or dealer software update, not a parts replacement, so check the service history shows the update was done.

2021 AWD Mach-E · software recall, no cost to owner · sources: Wikipedia (citing NHTSA recall reporting)

Instrument cluster and electrical gremlins

Emerging

Owner reports collated by Honest John describe an instrument cluster going completely blank, a rear camera failing, and in one case an electrical fire on a low-mileage V8 GT. These read as isolated rather than a pattern Ford has acknowledged, but they're worth flagging: test every screen, camera and warning light on a viewing rather than assuming it's fine because the engine runs sweetly.

Reported from very low mileage upward · single-source reports · sources: Honest John reader reports

Crash-repair parts can take months to arrive

Emerging

Because most Mustang and Mach-E body panels and trim are shipped from North America rather than stocked in the UK, bodywork repairs after even a minor shunt have been reported taking ten weeks or more, sometimes longer for less common parts. This isn't a mechanical fault but it hits buyers in insurance write-off decisions and courtesy-car costs, so it's worth checking a car's panel gaps and paint match for any past repair.

Reported UK-wide · sources: Honest John reader reports

What to check on this car

Ranked from this model’s own MOT record, then from what owners report.

Saveable checklist

From this model’s MOT record

The physical checks its own defect data says are worth your time, most telling first.

Handbrake holdRuns high on this model Stop on a hill and put the handbrake on. It should hold the car firmly within a few clicks, or straight away on the button if it is electronic. Roll-back means adjustment at best, new cables or a caliper motor at worst.Recorded on 3.6% of tests at age 6-9 · class average 0.3%
Wheel bearingsRuns high on this model On the test drive, listen for a drone that rises with road speed and shifts when you sway the car gently between lanes. That is a wheel bearing, and it only ever gets louder.Recorded on 1.4% of tests at age 6-9 · class average 0.5%
Bushes and ball joints Drive slowly over broken tarmac with the windows down and listen for clonks from either end. Back at the car, have someone rock the steering wheel while you rest a hand on each front wheel; play you can feel through the tyre is a worn joint.Recorded on 1.1% of tests at age 6-9 · class average 0.9%
Leaks Look at the ground where the car usually stands, then glance under the engine after your test drive. Fresh drips of oil or coolant are the cheapest warning you will ever get about a car.Recorded on 1.0% of tests at age 6-9 · class average 2.0%
Exhaust Listen along the exhaust at cold idle for blowing or chuffing, and give the tailpipe a push to check nothing hangs loose. Small blows only get louder.Recorded on 0.7% of tests at age 6-9 · class average 0.6%
A binding brake After the test drive, hold the back of your hand near each wheel hub. One wheel running much hotter than the rest is a sticking caliper. A car that slows itself down when you lift off on a flat road is saying the same thing.Recorded on 0.6% of tests at age 6-9 · class average 0.2%

Worth doing on any used car

These judge the seller’s upkeep rather than the model, and they are where the haggling money is.

Tyres, all four Check the tread across the full width of each tyre, inner edge included, and look for cracking and mismatched brands. A set of decent tyres is £500 or more on most cars, which makes this the easiest money to take off a price. If the pressure warning light is on, budget for sensors too.Recorded on 22.4% of tests at age 6-9 · class average 20.1%
Pads and discs Look through the wheel spokes at the brake disc. A pronounced lip on its outer edge, or a rusty and scored face, means discs and pads are due all round, a few hundred pounds on most cars. A haggling point rather than a reason to walk away.Recorded on 9.6% of tests at age 6-9 · class average 10.1%
Windscreen and wipers Scan the glass in daylight for chips, especially in the driver's line of sight where even a small one can fail the MOT. Run the washers and check the wipers clear without smearing.Recorded on 2.2% of tests at age 6-9 · class average 1.7%

Because of what owners report

Drawn from the reports above rather than the MOT data. These are the model-specific ones.

On a Mach-E, ask when it last had a dealer software update and check the service history for it. No recent update could mean the loss-of-drive-power or 12V-flat fixes were never applied.
On an RWD Mach-E built 2021-2023, ask specifically about the differential/driveshaft recall and whether it's been actioned. An unactioned recall on this fault is a genuine safety issue, not just an inconvenience.
Try every screen, warning light, camera and the instrument cluster with the ignition on. A blank cluster or dead camera points to the electrical gremlins some owners have reported.
Check panel gaps, paint match and the bonnet/wing edges for signs of past accident repair. Given how long UK body parts take to arrive, a rushed or partial repair is more likely than on a mainstream car.
On a petrol V8 GT, listen for any tapping or ticking from the engine at idle once warm. Unusual engine noise is worth an inspection before buying, even without a documented pattern.
Ask for the full recall history (VIN check) rather than relying on the seller's memory. Several Mach-E recalls are software-only and leave no obvious trace unless you check the VIN.

The MOT data

Measured

Computed from DVSA MOT results, all of Great Britain, 2025. Nothing here is opinion.

How this model wears

Ford Mustang / Mach-EClass average, all tracked models

What testers flag

Share of tests where each item was recorded. The dark tick is the class average across all tracked models; bars are scaled within each group.

Faults with the car itself

The rows that judge the model rather than its keeper. 7,276 tests in this band.

Parking brake efficiency below minimum requirement
Fail
3.6%class 0.3%
Parking brake inoperative on one side
Fail
2.6%class 0.2%
A suspension pin, bush or joint excessively worn
Advisory
2.1%class 1.6%
Parking brake efficiency less than 50% of the required value
Fail
1.8%class 0.2%
A wheel bearing with excessive play
Advisory
1.4%class 0.5%
A suspension pin, bush or joint excessively worn
Fail
1.1%class 0.7%
Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users
Advisory
1.0%class 2.0%
Parking brake lever has excessive movement indicating incorrect adjustment
Fail
0.8%class 0.1%
Exhaust system leaking or insecure
Advisory
0.7%class 0.6%
A wheel bearing with excessive play
Fail
0.7%class 0.1%

Wear, upkeep and luck

Tyres, pads and stone chips say more about how the car was driven and maintained than about how it was built.

Tyre tread depth not in accordance with the requirements
Advisory
24.9%class 22.9%
A tyre seriously damaged
Advisory
12.3%class 13.4%
Brake disc or drum excessively weakened, insecure or fractured
Advisory
9.6%class 10.1%
A brake lining or pad worn below 1.5mm
Advisory
5.4%class 8.7%
A tyre cords visible or damaged
Fail
2.7%class 1.2%
Wiper blade missing or obviously not clearing the windscreen
Fail
2.2%class 1.7%
Tyre tread depth not in accordance with the requirements
Fail
2.0%class 2.3%
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
Fail
1.5%class 0.8%

Others in its class

Same segment (Coupés, convertibles & GT), best MOT record first. Compare before you shortlist.