Model Reports 4 min read Updated 18 Oct 2026

Audi A2 2004: reliability & common MOT faults

In 2025, 56 in every 100 first MOTs on a 2004 Audi A2 were passes. Most common reason for a fail: Handbrake efficiency below minimum (roller test).

Summary

The 2004 Audi A2 follows the pattern of the model years either side.

At a glance

How 1,321 first tests went in 2025.

Passed first time
56 in every 100
Did not pass first time
44 in every 100576 failed first-attempt tests
The typical car
21 yearsabout 127,146 miles
First tests counted
1,321

What failed most often

  1. Handbrake efficiency below minimum (roller test)12 in every 100 failed tests
  2. Headlight aim11 in every 100 failed tests
  3. Petrol engine warning light11 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 Audi A2 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.

Suspension

Two faults. The strongest is the suspension arm (front): 14 times as often as on similar cars.

Figures below are measured across the 575 of 576 failed first attempts (99.8%) 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.

Suspension arm (front)

Failed on 37 first tests14 times as often as similar carsLikely evidence

What it means

A missing bump stop rubber is not a reason to fail a suspension arm. A component that is fractured, missing or likely to fail is graded Dangerous, and one excessively damaged or corroded is Major. On some vehicles, some highly stressed parts are thin pressed steel, and many of those have hollow box sections or up-facing areas that can collect road dirt and salt, so they get special attention.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 34 first tests, 3.0 times as often as on similar cars.

Coil spring (rear)

Failed on 32 first tests2.1 times as often as similar carsPossible 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.

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

Brakes

Three faults. The strongest is the brake imbalance across an axle (roller test, efficiency check, rear): 3.2 times as often as on similar cars.

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

Failed on 32 first tests3.2 times as often as similar carsLikely 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.

Flexible brake hoses (front)

Failed on 30 first tests2.7 times as often as similar carsPossible evidence

What it means

Testers reject a flexible brake hose for being excessively damaged or chafed only if it is severe enough to expose the reinforcement. Slight damage, chafing or twisting is graded Minor. A leak is graded Dangerous on a hydraulic braking system and Major on an air system, and a hose damaged and likely to fail is also Dangerous.

Brake performance (roller test, rear)

Failed on 35 first tests2.3 times as often as similar carsPossible evidence

What it means

A wheel with no recorded braking effort on the roller test is graded Dangerous. Inadequate effort, a brake grabbing severely, abnormal lag and excessive fluctuation in effort are each Major. So is significant brake effort recorded with no brake applied, which indicates a binding brake.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 34 first tests, 2.1 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

One fault: individual direction indicators (rear), 2.1 times as often as on similar cars.

Individual direction indicators (rear)

Failed on 21 first tests2.1 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.

Also noted as an advisory

Testers also noted it as an advisory, worn but not yet failing, on 20 first tests, 3.0 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.

MOT pass rates

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

Passed first time
56in every 100
Passed on the first test.
Fixed at the station
8in every 100
Failed, then fixed at the test station the same day.
Failed
36in every 100
Did not pass, and were not fixed at the test station.

First-attempt pass 56.4% of 1,321 first tests (2025): only cars that passed first time count. Official-style pass 63.5%: cars fixed at the test station also count as a pass. The 8 fixed and the 36 not fixed make the 44 in every 100 that did not pass first time.

Petrol and diesel

First testsPassed first time, as tested
Diesel84859
Petrol47352

Figures are in every 100 first tests.

Same model, other years

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

40608010020012002200320042005Older carsNewer cars
40608010020012002200320042005Older cars

Newer cars are younger, so look for a jump rather than the climb.

YearPassed first timeFirst tests
200153 in every 100957
200254 in every 1001,243
200356 in every 1001,035
2004 This car56 in every 1001,321
200558 in every 100827

FAQs

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

The 2004 Audi A2 follows the pattern of the model years either side. Its main cause of failure was Handbrake efficiency below minimum (roller test), about 12 in every 100 failed tests. In 2025, 56.4% of 1,321 first MOTs on the 2004 Audi A2 passed first time (PRS: items fixed at the station the same day, counted as a fail). The official-style rate including PRS is 63.5%. Among 576 failed first-attempt MOT tests (test year 2025), Suspension arm (front) appears more often than on similar cars (6.4% of those tests; 37 observed failures; about 14× 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 Audi A2 at the first attempt were Handbrake efficiency below minimum (roller test) (12.0%), Headlight aim (11.0%) and Petrol engine warning light (10.8%), 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: Suspension arm (front) (6.4% of those tests; 37 observed failures; about 14× more often than similar cars). These are statistical signals, not a diagnosis of any individual car.
Suspension arm (front) shows up more often than on similar cars (6.4% of those tests; 37 observed failures; about 14× 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 Audi A2 include Suspension arm (front), Brake imbalance across an axle (roller test, efficiency check, rear), Flexible brake hoses (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.
This page highlights MOT failure patterns for the 2004 Audi A2 (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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