Model Reports 4 min read Updated 18 Oct 2026

Fiat Doblo 2015: reliability & common MOT faults

In 2025, 62 in every 100 first MOTs on a 2015 Fiat Doblo were passes. Most common reason for a fail: Coil spring (front).

Summary

The 2015 Fiat Doblo follows the pattern of the model years either side.

At a glance

How 4,378 first tests went in 2025.

Passed first time
62 in every 100
Did not pass first time
38 in every 1001,651 failed first-attempt tests
The typical car
10 yearsabout 89,262 miles
First tests counted
4,378

What failed most often

  1. Coil spring (front)20 in every 100 failed tests
  2. Tyre condition (rear)8 in every 100 failed tests
  3. Anti-roll bar linkage ball joint dust cover (front)7 in every 100 failed tests

How we count this. Data: UK MOT open data, 2025. Only Class 4 cars on their first MOT of the year are counted. A car that fails and is fixed at the test station still counts as a fail in the first-attempt rate. These are raw results, not adjusted for age, mileage, or peer mix. The MOT does not test engine or gearbox internals.

Note:

These are patterns across 2015 Fiat Doblo vehicles in 2025, not a prediction that any one car will have them. Faults are grouped by part of the car. They come from MOT defect codes, not manufacturer bulletins, recalls or a diagnosis of any one car.

Brakes

One fault: brake pedal, 6.5 times as often as on similar cars.

Figures below are measured across the 1,643 of 1,651 failed first attempts (99.5%) that recorded an odometer reading in 2025. Mileage is needed to compare like with like.

We only list faults with at least 20 failures and a rate of about 2.0 times that of similar cars, which keeps one-off results out of the list.

Brake pedal

Failed on 41 first tests6.5 times as often as similar carsLikely evidence

What it means

A brake pedal rubber worn smooth is not a defect, and nor is a worn design pattern on an aftermarket rubber. A pedal with no rubber is rejected if its grooves or raised grip sections are worn smooth, unless the vehicle was made without them. Insufficient reserve travel is Major, but a vehicle is failed for it only if the pedal or lever is touching the floor or handlebar.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

Suspension

Five faults. The strongest is the macpherson strut (front): 6.1 times as often as on similar cars.

Macpherson strut (front)

Failed on 39 first tests6.1 times as often as similar carsLikely evidence

What it means

Many MacPherson strut top bushes are designed to have significant lateral play when the suspension hangs free, so a top bush is rejected only when the play comes from wear or maladjustment. A top bush or bearing with excessive wear or free play is Major. Rubber or synthetic bushes are rejected only for serious deterioration of the bonding or flexible material.

Anti-roll bar ball joint dust cover (front)

Failed on 55 first tests4.1 times as often as similar carsLikely evidence

What it means

A missing anti-roll bar ball joint dust cover is Major, and so is one that no longer prevents the ingress of dirt. A cover that is only severely deteriorated is Minor. DVSA uses one wording for the dust cover on any suspension joint.

Coil spring (front)

Failed on 333 first tests3.8 times as often as similar carsLikely evidence

What it means

A missing bump stop rubber is not a reason to fail a coil spring. When the vehicle is jacked and lowered, a spring that does not correctly locate as the suspension returns to its normal running position is rejected as insecurely attached. A missing spring is Major, and graded Dangerous where directional control is affected.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 39 first tests, 3.0 times as often as on similar cars.

Anti-roll bar linkage ball joint dust cover (front)

Failed on 123 first tests3.7 times as often as similar carsLikely evidence

What it means

A suspension joint dust cover that is severely deteriorated is Minor. It becomes Major once it is missing or no longer prevents the ingress of dirt, so what matters is whether it still keeps dirt out. DVSA words this for any suspension joint dust cover, and files it here under anti-roll bars.

Anti-roll bar linkage ball joints (front)

Failed on 69 first tests2.1 times as often as similar carsPossible evidence

What it means

Excessive wear on an anti-roll bar linkage ball joint is Major. A joint likely to become detached is graded Dangerous.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

Noise, emissions and leaks

One fault: diesel emissions test (compression-ignition rules for vehicles from 01/01/2014), 4.3 times as often as on similar cars.

Diesel emissions test (compression-ignition rules for vehicles from 01/01/2014)

Failed on 99 first tests4.3 times as often as similar carsLikely evidence

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

Body and structure

One fault: exhaust system (rear), 3.9 times as often as on similar cars.

Exhaust system (rear)

Failed on 48 first tests3.9 times as often as similar carsLikely evidence

What it means

Exhaust fumes causing a danger to health of persons on board are graded Dangerous, and so is a silencer likely to become detached. Fumes entering the cabin are Major. One or more missing or defective mountings does not necessarily make the exhaust insecure, since testers assess the overall security of the system.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 59 first tests, 4.1 times as often as on similar cars.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage. Advisories count notes recorded on failed first tests only.

Lamps and electrical

Two faults. The strongest is the side repeater indicators: 3.0 times as often as on similar cars.

Side repeater indicators

Failed on 70 first tests3.0 times as often as similar carsLikely evidence

What it means

Sequential or dynamic direction indicators are not a reason to fail. Where a side repeater is required, it is allowed to be part of the front direction indicator if it has a marked wraparound lens, or an amber light coming through the front lens when viewed from a set distance to the side of the rear bumper. A lens defect with no effect on the emitted light is Minor, and one that adversely affects the light is Major.

Horn

Failed on 33 first tests2.2 times as often as similar carsPossible evidence

What it means

A horn that does not work, or is likely to be confused with an emergency vehicle siren, is graded Major. Gongs, bells, sirens and anything with more than one tone, which includes a horn that alternates between its notes, are not allowed, except a gong, bell or siren on vehicles first used before a set date. Sound defects are Minor for named cases such as a bell or harsh sound, and Major under a general row.

Data: UK MOT open data, 2025. Compared with cars of the same age and mileage.

Advisories

Other things testers noted as worn or close to failing, more often than on similar cars.

An advisory is a note from the tester about something that has not failed yet. It is an early warning, not a fail. Advisories for the faults above are shown with those faults.

Macpherson strut pins and bushes (front)

Noted on 37 first tests4.3 times as often as similar carsPossible evidence

Coil spring (rear)

Noted on 153 first tests3.1 times as often as similar carsElevated evidence

Individual direction indicators (rear)

Noted on 34 first tests3.0 times as often as similar carsElevated evidence

Suspension arm pins and bushes (rear)

Noted on 58 first tests2.8 times as often as similar carsElevated evidence

Engine oil leaks (front)

Noted on 196 first tests2.3 times as often as similar carsElevated evidence

Wheel bearings (front)

Noted on 21 first tests2.1 times as often as similar carsElevated evidence

Data: UK MOT open data, 2025. Counts cover advisories recorded on failed first tests only, compared with cars of the same age and mileage.

MOT pass rates

How first tests ended, and how the pass rates are counted.

Passed first time
62in every 100
Passed on the first test.
Fixed at the station
7in every 100
Failed, then fixed at the test station the same day.
Failed
31in every 100
Did not pass, and were not fixed at the test station.

First-attempt pass 62.3% of 4,378 first tests (2025): only cars that passed first time count. Official-style pass 68.5%: cars fixed at the test station also count as a pass. The 7 fixed and the 31 not fixed make the 38 in every 100 that did not pass first time.

Petrol and diesel

First testsTypical mileagePassed first time, as tested
Diesel3,72596,123 miles58
Petrol65343,132 miles85

Figures are in every 100 first tests.

Same model, other years

Passed first time in every 100, all tested in 2025.

4060801002005201020152020Older carsNewer cars
406080100201020152020Older carsNewer cars

Newer cars are younger, so look for a jump rather than the climb. A year earlier (2024), when these cars were a year younger, 65 in every 100 passed first time.

YearPassed first timeFirst tests
200350 in every 100305
200447 in every 100590
200549 in every 100832
200651 in every 1001,312
200752 in every 1001,803
200856 in every 1001,678
200960 in every 1001,375
201057 in every 1001,562
201154 in every 1001,661
201257 in every 1001,820
201371 in every 1005,795
201459 in every 1005,136
2015 This car62 in every 1004,378
201663 in every 1003,195
201765 in every 1002,323
201870 in every 1001,871
201970 in every 1001,602
202069 in every 1001,153
202174 in every 1001,810
202276 in every 100666

If you are buying one

What this year's MOT record means for the decision in front of you.

Mileage matters most on a 2015 Doblo.

Of 2015 Doblo vehicles with under 55,000 miles, 77 in every 100 passed their 2025 MOT first time. With 121,000 miles or more, 56 in every 100 did.

Under 55,000889 tests
77
55,000–79,000836 tests
64
79,000–99,000 Typical car878 tests
59
99,000–121,000890 tests
55
121,000 and over862 tests
56

What to check at your mileage

How often each fault turned up on a failed first test, by the car's mileage. Read it as: what is likely to need looking at on a car like the one in front of you.

Under 55,00079,000–99,000121,000 and over
Coil spring (front)5.17.78.6
Tyre condition (rear)1.23.04.1
Anti-roll bar linkage ball joint dust cover (front)1.63.33.0
Tyre tread depth (front)1.63.03.0
Headlight aim1.62.73.2

Faults per 100 first tests, by the car's mileage at the test.

When a car fails

34in every 100

of failed cars had one item to fix.

39in every 100

of failed cars had three or more items to fix.

9in every 100

of all first tests had a defect the tester marked dangerous (unsafe to drive away).

Every figure here is a first-attempt MOT rate from DVSA open data for this model line, for cars of this model year tested in 2025. Each mileage band holds a fifth of the tests. MOTs do not test engine or gearbox internals, so this is a pre-purchase checklist, not a full reliability score.

FAQs

Short answers about how to read this model-year guide.

The 2015 Fiat Doblo follows the pattern of the model years either side. Its main cause of failure was Coil spring (front), about 20 in every 100 failed tests. In 2025, 62.3% of 4,378 first MOTs on the 2015 Fiat Doblo passed first time (PRS: items fixed at the station the same day, counted as a fail). The official-style rate including PRS is 68.5%. Among 1,651 failed first-attempt MOT tests (test year 2025), Brake pedal appears more often than on similar cars (2.5% of those tests; 41 observed failures; about 6.5× more often than similar cars). There is no single reliability score here; this is a pre-purchase checklist built from DVSA open data, not a guarantee for any individual car.
Ranked by how often they were actually recorded, the items that most often failed a 2015 Fiat Doblo at the first attempt were Coil spring (front) (20.3%), Tyre condition (rear) (7.9%) and Anti-roll bar linkage ball joint dust cover (front) (7.5%), each as a share of the year's failed first attempts. That is what goes wrong most often on the car. The common faults table shows a different measure: faults that are unusual compared with similar cars.
Among failed first-attempt tests we highlight patterns that appear more often than on similar cars. Top example: Brake pedal (2.5% of those tests; 41 observed failures; about 6.5× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Brake pedal shows up more often than on similar cars (2.5% of those tests; 41 observed failures; about 6.5× more often than similar cars). That does not prove a design fault. Age, mileage, and how the car was used still matter. Treat it as a pre-purchase checkpoint, not a manufacturer service bulletin.
Common MOT problem areas for the 2015 Fiat Doblo include Brake pedal, Macpherson strut (front), Anti-roll bar ball joint dust cover (front). These are the faults that stand out compared with similar cars, not a complete list of what can go wrong on any individual car.
Advisories flag issues noted at the test and are not a fail rate. We show advisory patterns that appear more often than on similar cars among failed first-attempt tests, separate from common failure rows. Use them as early-warning checks, not as a pass/fail score.
This page highlights MOT failure patterns for the 2015 Fiat Doblo (registration year) using UK DVSA open data for the selected test year. Patterns are compared with cars of a similar age and mileage. It is a buyer checklist from MOT defect statistics, not a full service history or manufacturer service-bulletin list.
No. MOT tests do not cover engine internals, gearboxes, or many electronic modules. Patterns here come from MOT defect statistics only and should not be read as engine or gearbox reliability scores.

About this data

How this page is built and what it can (and can't) say.

These figures come from UK MOT open data for this model year. We surface common failure patterns against similar cars, not a full reliability score, and not a pass/fail verdict on any individual vehicle.

2024 2025

What we include

UK Class 4 cars only. Normal MOT tests (not retests); first test per vehicle per calendar year; results pass, PRS, or fail.

Same-day repairs

PRS means the car failed items that were fixed at the test station and then passed the same day. We count PRS as a first-attempt fail in headline rates so same-day repairs do not hide problems.

How we compare

We compare this model year with other Class 4 cars of similar age and mileage in the same test year. This model family is left out of the peer group so the car is not measured against itself.

What this does not cover

  • MOTs do not cover engine internals, gearboxes, or many electronics; this is not a full reliability score.
  • Common faults come from MOT defect stats, not manufacturer TSBs or recalls.
  • Age and mileage matching reduces, but does not remove, differences in how cars were used and maintained.
  • If the data for a car is too thin to say anything useful, we say so rather than guess.

Contains public sector information licensed under the Open Government Licence v3.0.

Check any vehicle’s MOT history

Full MOT history, mileage records, and reliability insights for any UK vehicle.

Run a free check