Fiat 500 Lounge MHEV Reliability: Common Problems and Years to Avoid
What the Fiat 500 Lounge MHEV fails its MOT on, with rough repair costs, and how each model year's MOT pass rate compares with other cars of the same age. Based on 11,147 MOT tests across 2 model years (DVSA data for tests carried out in 2024, retests included).
Segment: city car | Fuel: Petrol
92%
Fiat 500 Lounge MHEV pass rate
83%
Fiat average
82%
All-model average
The Fiat 500 Lounge MHEV has an average MOT pass rate of 92%, which is 9 points above the Fiat average and 10 points above the average across all models in our data.
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What the Fiat 500 Lounge MHEV Fails Its MOT On
Of the 912 MOT tests on the Fiat 500 Lounge MHEV that failed at the first attempt in 2025, the share that failed on each part of the test, next to the share for all cars and vans of the same ages. A test that failed on two areas counts in both.
Tyres
51%Cars and vans the same age: 37% (the 500 Lounge MHEV fails on this more often) · Typical repair £50-£300
Lights and electrics
25%Cars and vans the same age: 22% · Typical repair £15-£200
Windscreen, wipers and mirrors
24%Cars and vans the same age: 23% · Typical repair £10-£350
Brakes
6.9%Cars and vans the same age: 16% (the 500 Lounge MHEV fails on this less often) · Typical repair £80-£450
Suspension
6.1%Cars and vans the same age: 9.6% (the 500 Lounge MHEV fails on this less often) · Typical repair £150-£600
The 3 single faults it failed on most
- Tyre has ply or cords exposed (24% of failed tests, tyres)
- Tyre tread depth below the 1.6mm limit (12% of failed tests, tyres)
- Wipers: does not clear the windscreen effectively (11% of failed tests, windscreen, wipers and mirrors)
Source: CarCostCheck analysis of DVSA anonymised MOT test results and failure items for 2025: first attempt at each MOT, fail and pass-after-repair defects, DVSA's defect categories (names shortened). Repair costs are rough UK ranges, not quotes. Method and national figures: MOT failure reasons 2025.
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Fiat 500 Lounge MHEV Years to Avoid
Every car in the 2024 MOT data was tested at the same age as the other cars first registered that year, so each 500 Lounge MHEV year is compared with all cars from the same year. Years with 1,000+ tests that were at least three years old are included.
Failed more often than cars their age
No year passed 3 or more points less often than other cars of the same age.
Passed more often than cars their age
No year passed 3 or more points more often than other cars of the same age.
A lower pass rate means that year failed its MOT more often in 2024; it does not mean every car from that year is bad. Old cars still on the road are often the best-kept ones, which can lift the pass rates of the oldest years. How a car has been looked after matters more, so check the MOT history of the car you are looking at.
Fiat 500 Lounge MHEV Reliability by Year
MOT pass rate for each model year, from DVSA data for tests carried out in 2024 (retests included). Newer cars usually pass more often simply because they are younger. All Cars is the pass rate of every car first registered that year, with the gap in points. Highest and lowest are marked among years with 100+ tests that were at least three years old when tested. Fuel and engine size are a guide only.
Fiat 500 Lounge MHEV Running Costs
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Fiat 500 Lounge MHEV FAQ
What are the most common Fiat 500 Lounge MHEV problems?
In 2025, MOT tests on the Fiat 500 Lounge MHEV that failed at the first attempt most often failed on tyres (51% of the 912 failed tests), lights and electrics (25%) and windscreen, wipers and mirrors (24%). The single most common fault was "Tyre has ply or cords exposed" (24%). Across 11,147 MOT tests (DVSA MOT data for tests in 2024, retests included), 92% ended in a pass.
Is the Fiat 500 Lounge MHEV reliable?
The Fiat 500 Lounge MHEV has an average MOT pass rate of 92%, from 11,147 MOT tests (DVSA MOT data for tests in 2024, retests included). Comparing each model year with all cars first registered the same year, so that age is allowed for, it passed about as often as other cars of the same age.
Which Fiat 500 Lounge MHEV years should I avoid?
No Fiat 500 Lounge MHEV year with 1,000+ tests passed 3 or more points less often than all cars first registered the same year (DVSA MOT data for tests in 2024, retests included). A year's pass rate does not tell you about one car, so check the MOT history of the car you are buying.
How much does it cost to fix common Fiat 500 Lounge MHEV faults?
As a rough guide, brake work on a Fiat 500 Lounge MHEV typically costs £80-£450 and suspension repairs £150-£600, while exhaust and emissions fixes can cost £80-£800. Lighting and wiper fixes are usually under £200.
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Related model: Fiat 500 reliability and common problems
Other Fiat Models
Common problems pages for other Fiat models