Model Reports 4 min read Updated 18 Oct 2026

Fiat Doblo 2004: reliability & common MOT faults

In 2025, 47 in every 100 first MOTs on a 2004 Fiat Doblo were passes. Most common reason for a fail: Suspension mounting area (rear).

Summary

With 590 first tests, there are too few to say whether the 2004 Fiat Doblo differs from the model years either side.

At a glance

How 590 first tests went in 2025.

Passed first time
47 in every 100
Did not pass first time
53 in every 100314 failed first-attempt tests
The typical car
21 yearsabout 112,513 miles
First tests counted
590

What failed most often

  1. Suspension mounting area (rear)20 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 2004 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

Two faults. The strongest is the brake efficiency below minimum (roller test): 6.7 times as often as on similar cars.

Figures below are measured across the 309 of 314 failed first attempts (98.4%) 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 efficiency below minimum (roller test)

Failed on 25 first tests6.7 times as often as similar carsPossible evidence

What it means

Service brake efficiency below the minimum requirement is Major, and efficiency less than half of the required value is graded Dangerous. On a roller brake tester, if more than half of the wheels of a brake system lock, the efficiency requirement for that system counts as met.

Brake imbalance across an axle (roller test, efficiency check, rear)

Failed on 21 first tests3.8 times as often as similar carsPossible evidence

What it means

A wheel giving less than a set share of the maximum effort from the other wheel on the same axle is Major. On a steered axle, less than half is graded Dangerous. Testers disregard an imbalance if the lower effort is the result of a locked wheel, or if the higher effort from a wheel is at or below a low set figure.

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

Noise, emissions and leaks

One fault: diesel emissions test (pre-reg turbo rules before 01/07/2008), 5.1 times as often as on similar cars.

Diesel emissions test (pre-reg turbo rules before 01/07/2008)

Failed on 24 first tests5.1 times as often as similar carsPossible evidence

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

Lamps and electrical

One fault: individual direction indicators (rear), 3.6 times as often as on similar cars.

Individual direction indicators (rear)

Failed on 20 first tests3.6 times as often as similar carsPossible evidence

What it means

Direction indicators must be amber, though vehicles first used before a set date may have white at the front and red at the rear when the indicators are combined with stop or position lamps, and sequential or dynamic ones are not a reason to fail. A lamp that is missing, inoperative or has more than half of a multiple light source not functioning is graded Major. A flashing rate outside the permitted range is graded Minor.

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

Suspension

One fault: suspension mounting area (rear), 3.5 times as often as on similar cars.

Suspension mounting area (rear)

Failed on 63 first tests3.5 times as often as similar carsLikely evidence

What it means

The load bearing structure within a set distance of a sub-frame, spring or suspension component mounting is a prescribed area. Major applies when its strength or continuity is significantly reduced or it is inadequately repaired. Dangerous applies when it is so weakened that control of the vehicle is likely to be adversely affected.

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.

Suspension sub-frame (front)

Noted on 23 first tests2.9 times as often as similar carsElevated evidence

Shock absorbers (rear)

Noted on 29 first tests2.6 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
47in 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
46in every 100
Did not pass, and were not fixed at the test station.

First-attempt pass 46.8% of 590 first tests (2025): only cars that passed first time count. Official-style pass 53.9%: cars fixed at the test station also count as a pass. The 7 fixed and the 46 not fixed make the 53 in every 100 that did not pass first time.

Same model, other years

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

4060801002004201020152020Newer cars
406080100200420102020Newer 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, 46 in every 100 passed first time.

YearPassed first timeFirst tests
200350 in every 100305
2004 This car47 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
201562 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

FAQs

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

With 590 first tests, there are too few to say whether the 2004 Fiat Doblo differs from the model years either side. Its main cause of failure was Suspension mounting area (rear), about 20 in every 100 failed tests. In 2025, 46.8% of 590 first MOTs on the 2004 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 53.9%. Among 314 failed first-attempt MOT tests (test year 2025), Brake efficiency below minimum (roller test) appears more often than on similar cars (8.1% of those tests; 25 observed failures; about 6.7× 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 2004 Fiat Doblo at the first attempt were Suspension mounting area (rear) (20.4%), 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 efficiency below minimum (roller test) (8.1% of those tests; 25 observed failures; about 6.7× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Brake efficiency below minimum (roller test) shows up more often than on similar cars (8.1% of those tests; 25 observed failures; about 6.7× 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 2004 Fiat Doblo include Brake efficiency below minimum (roller test), Brake imbalance across an axle (roller test, efficiency check, rear), Individual direction indicators (rear). 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 2004 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.

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