Motoring Today

Audi A4 MOT reliability

Reliability from 11 Audi A4 cars with real DVSA MOT history — how often they pass first time, the most common failure reasons.

Reviewed by the Motoring Today Editorial team · methodology in our editorial standards.

How reliable is the Audi A4 at MOT?

Across 2 Audi A4 cars on Motoring Today, the average first-time MOT pass rate is 92%. 100% of stock currently holds a valid MOT, with a median of 7 months left on the certificate. The most common reasons these cars fail an MOT are brakes, tyres and suspension, from real DVSA test history.

Avg pass rate
92%
Valid MOT
2 / 2
Median MOT left
7 mo
Top failure
Brakes

Motoring Today currently lists 3 Audi A4 models for sale, with prices starting from £10,090, or a representative monthly finance example from £313. Based on a substantial 264,162 national DVSA MOT tests, the Audi A4 achieves a pass rate of 77.26%. This figure reflects cars presented for their annual inspection and should not be taken as an indicator of lifetime reliability, as many factors like age, mileage, and maintenance routines significantly influence a car's condition, rather than simply the badge. Analysis of these tests reveals common reasons for failure. The most frequent issue, accounting for 27% of all failures, is "Lighting & electrical," often relating to bulbs, wiring, or fuse issues. Following this, "Tyres" account for 20% of failures, typically due to insufficient tread depth or damage. "Suspension" issues contribute 17%, while "Brakes" make up 14% of failures, often concerning worn pads, discs, or fluid leaks. For a used-car buyer, these insights highlight key areas to inspect before purchasing an Audi A4. Beyond checking all lights are fully functional, prospective owners should pay close attention to tyre condition, looking for even wear and adequate tread. A thorough check of the suspension for any knocking noises or uneven stance, and confirmation of brake responsiveness and absence of grinding, are also advisable. These checks can help mitigate potential immediate MOT retest costs.

92First-time MOT pass
Average pass rate
Stock with valid MOT
2 / 2
100% road-ready
Median MOT left
7 mo
Expiring < 2 mo
0
Plan for an MOT soon after purchase

Most common MOT failures on the Audi A4

Grouped reasons for MOT rejection across 11 Audi A4 cars with DVSA test history in our stock (5 recorded failure items).

Failure areaRecorded failuresShare of failures
Brakes240%
Tyres240%
Suspension120%

Based on real DVSA MOT test records for cars currently listed. Individual condition varies — always check the specific car's MOT history and advisories on its listing.

MOT pass rate is the percentage of Audi A4 cars in our stock that passed their most recent MOT on the first attempt, based on DVSA history. A pass rate above 80% is generally strong for a car of this age.

If a car you're viewing is approaching its MOT expiry, factor in the cost of any advisories — these are listed on each vehicle detail page.

Data journalism

Why Audi A4s fail their MOT

It's not the gearbox or the complex electronics that trip up the Audi A4 at MOT time; instead, a surprising 27% of its failures come from mundane lighting and electrical faults.

Written and reviewed by Phil Kehoe, Director, Motoring Today · methodology in our editorial standards.

The surprising weak link in the Audi A4's MOT record

It's rarely the engine or gearbox that sees an Audi A4 fail its annual inspection; instead, national DVSA MOT data reveals that a surprising 27% of all Audi A4 failures are due to faults with its lighting and electrical systems. For a car with a reputation for sophisticated engineering, this everyday issue is far more common than many might expect, making it the single largest category of defect.

This isn't an isolated issue. After lighting, tyres account for a significant 20% of failures, followed by 'Other' faults at 18%, and suspension issues at 17%. Brake problems make up another 14% of the failures, with visibility issues (windscreen and wipers) being the least common major category at 4%.

From new to old: the Audi A4's MOT journey

Across every age of the Audi A4 that motoring.today holds data for, the average MOT pass rate stands at 77.3%. However, when focusing on just the first MOT test, typically conducted when the car is around three years old, the picture is considerably brighter. For these younger examples, the pass rate jumps to 89.3%. This suggests that while the A4 holds up well in its early life, minor electrical and wear-and-tear items begin to accumulate as the car ages, leading to a dip in its overall pass rate.

How we worked this out

Our analysis of the Audi A4’s MOT performance is built on national DVSA MOT test records, covering 264,162 vehicles with recorded history in the UK. We track models with a meaningful number of tests behind them. For this specific model, we examined 146,550 individual defects recorded during tests to identify the most common failure categories. It's important to remember that these figures reflect the condition of cars *as presented* for their MOT, not necessarily their overall reliability. A pass rate indicates whether a vehicle met the minimum legal safety and environmental standards on the day of the test, not that it was fault-free throughout its ownership.

What the data can’t tell you

While our data provides an honest, data-led snapshot of MOT performance for the Audi A4, it's not a crystal ball for your individual car. Failures often cluster around age, maintenance history, and how a car has been used, rather than being an intrinsic brand characteristic. The MOT test, for example, cannot predict future mechanical issues, nor does it account for unscheduled repairs or running costs between tests. It reflects a car's condition at a specific point in time, and every car is an individual.

Before your next test

Given that lighting and electrical issues are the biggest cause of Audi A4 MOT failures, a thorough pre-MOT check of all lights – headlights, indicators, brake lights, and number plate illumination – is a sensible first step. Beyond that, a close inspection of tyres for tread depth and condition, and a check of the suspension components, could save time and money. Our analysis, along with similar insights for other models, is available on our dedicated MOT reliability hub.

Data journalism generated from motoring.today marketplace data on 26 September 2026 — every £/%/day figure above is verified against our own computed statistics before publication.

Frequently asked questions

What is the MOT pass rate for a used Audi A4?
Based on 264162 national DVSA MOT tests, the Audi A4 has a pass rate of 77.26%. This figure reflects the percentage of Audi A4 vehicles that pass their MOT on the first attempt.
What are the most common MOT failures on an Audi A4?
The most common MOT failures for the Audi A4 are in the Lighting & electrical category (27% of failures), followed by Tyres (20%), and then Other (18%), Suspension (17%), and Brakes (14%).
Is the Audi A4 reliable?
An MOT pass rate reflects the condition of vehicles presented for test, not overall lifetime reliability. MOT failures tend to cluster with vehicle age, mileage, and maintenance history, meaning that a well-maintained Audi A4 is more likely to pass.
What should I check on an Audi A4 before buying?
Given the common MOT failure categories, it's advisable to thoroughly inspect the lighting and electrical systems, check tyre condition and tread depth, and examine the suspension components and brakes for wear or damage.
What are the most common MOT failures on the Audi A4?
Across 11 Audi A4 cars on Motoring Today with DVSA MOT history, the most common reasons for MOT failure are brakes, tyres and suspension (brakes account for 40% of recorded failures).

More Audi A4 resources