Fault File
All models / All cars / MPVs / Fiat 500L

Fiat 500L

All generations and engines together · 17,038 MOT tests in the 2025 data · typical mileage at age 7: 49k

First-time failure at age 7
37.5%
Across 792 tests. The average across all tracked models is 19.5%.
Rank at age 7
237 of 239
1 = lowest failure rate among the models tracked.
Typical mileage at age 7
49k miles
Check the mileage view below; low-mileage models can look better by age than they are.

How this model wears

Fiat 500LClass average, all tracked models

Known issues

Measured

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

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. 4,685 tests in this band.

Steering rack gaiter or ball joint dust cover damaged or deteriorated
Minor
10.1%class 0.7%
A suspension pin, bush or joint excessively worn
Advisory
9.1%class 5.9%
Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc
Fail
9.1%class 0.5%
A spring or spring component fractured or seriously weakened
Fail
7.0%class 1.4%
A suspension pin, bush or joint excessively worn
Fail
5.2%class 0.9%
Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users
Advisory
4.8%class 2.0%
Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
Fail
4.2%class 0.8%
A suspension component excessively damaged or corroded
Advisory
3.2%class 0.7%
Play in steering rack inner joint(s)
Advisory
2.8%class 1.1%
Exhaust system leaking or insecure
Advisory
2.5%class 0.6%

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
24.7%class 22.9%
A tyre seriously damaged
Advisory
19.8%class 12.7%
Brake disc or drum excessively weakened, insecure or fractured
Advisory
15.1%class 10.1%
A brake lining or pad worn below 1.5mm
Advisory
8.3%class 8.7%
Brake disc or drum significantly and obviously worn
Advisory
5.7%class 3.4%
Child Seat fitted not allowing full inspection of adult belt
Advisory
3.7%class 2.2%
Tyre tread depth not in accordance with the requirements
Fail
2.9%class 2.2%
A brake lining or pad worn below 1.5mm
Fail
2.3%class 1.6%

Unconfirmed issues

Reported

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

Wrong oil wrecking the MultiAir system (TwinAir)

TwinAir petrol only

The 0.9 TwinAir petrol runs a MultiAir valve system that's fussy about oil spec, it needs Fiat's Selenium-rated oil, not a generic equivalent. Get it wrong on a service and the actuator can be damaged beyond repair, with owners reporting bills around £1,200. It tends to surface after a service at a garage that isn't used to Fiat's spec sheet rather than at any fixed mileage. No recall, just a spec that keeps getting missed.

Reported from 2016 onward, repair around £1,200 · sources: Honest John reader reports

DPF regen dumping fuel into the oil (1.3/1.6 MultiJet)

Diesel only

On the MultiJet diesels, a diesel particulate filter that keeps failing to regenerate properly can overfuel the cylinders, and the extra fuel washes past the rings into the sump instead of burning off. Oil level creeps up between services, and in the worst cases the engine ends up running on its own diluted sump oil, over-revving with no way to stop it by turning the key off. Owners on Fiat forums talk about having the DPF and EGR mapped out rather than keep replacing them, which says something about how often it comes back. No recall found; keep a check on the dipstick between services.

Affects 1.3/1.6 MultiJet diesel · sources: Honest John (Ask HJ), Fiat Forum, cartechnology.co.uk tuning forum

Dualogic automated gearbox: clutch and actuator wear

Dualogic automatic only

The 500L's automatic option in the UK is mostly Fiat's own Dualogic, a single-clutch automated manual rather than a conventional torque converter. Owners report jerky changes, a pause before reverse engages, and the clutch overheating if you sit holding the car on a hill in traffic. Once the clutch or the hydraulic actuator seals wear, expect a gearbox warning light and, in bad cases, a car that starts but won't move; one owner was quoted around £900 for gearbox removal and inspection alone, before any parts.

Reported at varying mileages · sources: ASR Gearbox Repairs, Fiat Forum, MoneySavingExpert forum

Steering angle sensor fault (off-centre wheel, grinding on lock)

Partly in the MOT data

Owners have reported the steering wheel sitting badly off-centre, up to 45 degrees in one documented case, with a grinding noise on full lock, traced to a steering angle sensor fault. Steering is the measured MOT signature fault for this segment, and this looks like the folklore version of it: a sensor and geometry problem rather than a worn track rod end or ball joint, so it can pass an MOT visual check while still feeling wrong to drive. No recall found for this specific fault.

Documented on a 2013-model 500L · sources: Honest John reader reports

Airbag warning light that won't stay off

Emerging

A recurring electrical gripe: the airbag warning light comes on, a dealer reset clears it, and then it comes back weeks or months later. That points to a fault in the trigger circuit or a sensor rather than the airbag itself, but it's not something an independent garage can chase down easily. No manufacturer bulletin found for it, so treat it as a fault that needs repeat visits rather than a one-off fix.

Reported recurring since 2016 · sources: Honest John reader reports

Viewing one? Ask this

Built from the two sections above.

Start the diesel from cold and check the dipstick. Oil noticeably above the max mark, or smelling of diesel, points at DPF regen overfuelling.
On a TwinAir petrol, ask for full service history and the oil used. Anything other than Selenium-spec oil on the invoice is a red flag for MultiAir damage.
If it's the Dualogic automatic, hold it on a slope in slow traffic for a minute. A burning smell, a warning light, or a jerky reverse means the clutch or actuator is wearing out.
Drive it in a straight line and check the steering wheel sits dead centre. An off-centre wheel or grinding on full lock is the steering angle sensor fault, not just wear.
Check the dash for an airbag warning light after start-up. If it's on, ask whether it's been reset before; a light that keeps returning rarely gets properly fixed.
Pull the full MOT history online before viewing. Repeated steering or suspension advisories line up with the pattern owners report.
Get a diagnostic read on any automatic before buying. Gearbox fault codes here usually mean an expensive Dualogic repair, not a quick reset.

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