Common problems

Audi A4 common problems

What MOT testers find on the Audi A4: the parts that fail or get advisories most often at each age, against all cars of the same age. From 1,045,108 DVSA MOT tests taken 2022 to 2025.

MOT data updated 28 September 2026

At 8 years, the most tested age

Suspension fails per 100 MOTs (n=77,548)7.5

All cars at 8 years (n=10,440,457)6.1

Tyres advisories and minor defects per 100 MOTs (n=77,548)24.7

All cars, same age (n=10,440,457)25.2

What stands out

Suspension fails show up on 7.5 of every 100 MOTs of a Audi A4 at 8 years old (n=77,548), against 6.1 for all cars of that age (n=10,440,457).
Lights and electrics fails are less common: 3.9 per 100 MOTs against 7.3 for all cars at the same age.
The fail item testers record most often at 8 years: coil spring broken, on 4.6 per 100 MOTs (all cars 2.1).
The most common advisory or minor defect: tread depth: worn close to legal limit/worn on edge, on 17.9 per 100 MOTs.

Problems by part at 8 years

How many of every 100 MOTs found a fail, or an advisory or minor defect, in each area. A test with faults in two areas counts in both.

Audi A4 at 8 years (n=77,548) against all cars at 8 years (n=10,440,457). Per 100 MOTs.
Area	Fails	All cars	Advisories	All cars
Suspension	7.5	6.1	15.2	11.8
Tyres	7.3	6.3	24.7	25.2
Lights and electrics	3.9	7.3	0.8	3.4
Brakes	2.9	4.8	15.8	19.1
Windscreen, wipers and mirrors	2.3	3.7	3.6	3.4
Exhaust, emissions and leaks	1.9	2.1	0.8	2.3
Body and structure	1.8	1.8	1.4	2.2
Seat belts and airbags	0.6	0.5	0.1	0.3
Road wheels	0.5	0.3	0.3	0.7
Number plates and VIN	0.3	0.3	2.1	1.4
Steering	0.1	1.2	0.1	1.5

What testers fail most on the A4 at 8 years

Fail items on the Audi A4 at 8 years (n=77,548), per 100 MOTs, with all cars at the same age (n=10,440,457).
Item	Area	Per 100 MOTs	All cars	Typical repair (estimate)
Coil spring broken	Suspension	4.6	2.1	£64 to £236 per spring (rough guide)
Tyre tread below 1.6 mm	Tyres	3.4	2.3	£88 to £145 per tyre
Brake pads under 1.5 mm	Brakes	1.5	2.0	£72 to £174 per axle (rough guide)
Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords	Tyres	1.5	1.3	£88 to £145 per tyre
Tyre with cords exposed	Tyres	1.4	1.2	£88 to £145 per tyre
Shock absorber leaking	Suspension	1.3	0.6	£122 to £484 per axle (pair) (rough guide)
Driveshaft CV boot split	Body and structure	1.2	0.9	£88 to £196 per boot (rough guide)
Wipers not clearing screen	Windscreen, wipers and mirrors	1.2	1.7	£15 to £30 per blade
Malfunction indicator lamp: inoperative or indicates a malfunction	Exhaust, emissions and leaks	1.1	0.6	diagnosis from £39 (rough guide)
Suspension arm bush worn	Suspension	0.9	0.9	£92 to £237 per arm (rough guide)

Early warnings: advisories and minor defects at 8 years

Advisories and minor defects are recorded, but the car still passes. Across all cars, a part with an advisory or minor defect failed at the next MOT 5.5 times in 100 (n=88,666,940 pairs of consecutive MOTs), against 0.3 times in 100 when the same part had none (n=12,936,860,350).

Advisories and minor defects on the Audi A4 at 8 years (n=77,548), per 100 MOTs, with all cars at the same age (n=10,440,457).
Item	Area	Per 100 MOTs	All cars	If it needs replacing (estimate)
Tread depth: worn close to legal limit/worn on edge	Tyres	17.9	15.7	£88 to £145 per tyre
Brake pads: wearing thin	Brakes	9.4	8.6	£72 to £174 per axle (rough guide)
Suspension arm pins and bushes: pin or bush worn but not resulting in excessive movement	Suspension	9.3	4.0	£92 to £237 per arm (rough guide)
Brake discs: worn, pitted or scored, but not seriously weakened	Brakes	5.6	8.6	£148 to £376 per axle (rough guide)
Tyre condition: slightly damaged/cracking or perishing	Tyres	4.4	8.6	£88 to £145 per tyre
Shock absorbers: has light misting of oil	Suspension	4.1	2.8	£122 to £484 per axle (pair) (rough guide)
Child Seat fitted not allowing full inspection of adult belt	Other	3.0	2.3
Brake discs: worn, but not excessively	Brakes	2.9	2.7	£148 to £376 per axle (rough guide)
Windscreen: damaged but not adversely affecting driver's view	Windscreen, wipers and mirrors	2.7	2.1
Tread depth: worn close to legal limit/worn on edge	Tyres	2.5	2.1	£88 to £145 per tyre

Repair estimates are a guide for an independent garage: labour at the national median local garage rate (median £78 an hour from 65 garages, ONS price quotes) times estimated labour hours, plus a parts band. Labour hours and most parts bands are estimates, not quotes, and prices vary by model, engine and region. A warning light fault shows the cost of the diagnosis only.

How problems change with age

Fails per 100 MOTs in the three most common areas at 8 years. Ages with fewer than 1,000 tests are not shown.
Age	Tests (n)	Suspension	Tyres	Lights and electrics
3 years	37,337	0.9	7.9	1.6
4 years	44,062	1.3	6.9	1.4
5 years	57,513	2.7	6.8	1.3
6 years	71,277	5.3	6.8	1.5
7 years	74,448	7.2	7.1	2.5
8 years	77,548	7.5	7.3	3.9
9 years	72,332	7.2	7.5	5.8
10 years	63,849	7.1	7.9	8.4
11 years	61,525	8.1	7.8	9.4
12 years	57,817	9.3	7.8	9.9
13 years	55,574	10.7	7.9	10.3
14 years	59,517	12.5	8.3	11.6
15 years	62,585	12.8	8.4	13.6
16 years	62,751	13.1	8.7	14.9
17 years	56,390	13.7	8.6	16.3
18 years	45,814	14.0	8.2	17.5
19 years	33,152	14.9	7.9	18.0
20 years	20,871	15.4	7.6	18.8
21 years	13,015	16.0	7.0	18.8
22 years	7,432	16.3	6.6	17.8
23 years	4,618	16.0	5.7	16.0
24 years	3,224	15.6	4.8	13.9
25 years	2,457	15.5	4.1	13.1

Mileage

At 8 years, Audi A4 cars showing under 30,000 miles failed 9.2% of MOTs (n=1,495); the band that failed most, 120,000 to 150,000 miles, failed 26.8% (n=6,737). For pass and fail rates by age, see Audi A4 MOT fail rates.

What to check on a viewing

On the Audi A4, testers most often record coil spring broken; tyre tread below 1.6 mm; brake pads under 1.5 mm. Look at these first, then the areas below.

Suspension

Listen for knocks or clonks over speed bumps and rough roads on the test drive.
Push down hard on each corner: the car should settle at once rather than keep bouncing.
Look behind the wheels for broken or heavily rusted coil springs and split rubber bushes.
Check that the car sits level and that no tyre is worn on one edge only.

Tyres

Check the tread across the full width of all four tyres, and the spare if there is one.
Look for cuts, bulges and cracking in the sidewalls.
Wear on one edge only can point to worn suspension or the tracking being out.

Lights and electrics

With someone outside, try every light: dipped and main beam, indicators, brake lights, fog lights and number plate lamps.
Check that the warning lights come on with the ignition and go out once the engine runs.
Look for misted, cracked or yellowed headlamp lenses.

Ask for the car's MOT history and service record: advisories that repeat from one year to the next show what has been left. GOV.UK MOT history.

Questions

What are the most common problems on the Audi A4?

At 8 years, the age with the most MOT tests (77,548), the fail items testers record most often on the Audi A4 are coil spring broken (4.6 per 100 MOTs), tyre tread below 1.6 mm (3.4 per 100 MOTs), brake pads under 1.5 mm (1.5 per 100 MOTs). The most common advisories or minor defects are tread depth: worn close to legal limit/worn on edge (17.9) and brake pads: wearing thin (9.4).

Which parts of the Audi A4 fail more often than on other cars?

At 8 years: suspension (7.5 per 100 MOTs against 6.1 for all cars); tyres (7.3 per 100 MOTs against 6.3 for all cars). Compared with 10,440,457 MOTs of all cars the same age.

Audi A4 problems by area

Other Audi models

All Audi models · Common problems by make

Read this with care. A fail rate is not a measure of build quality. How far cars are driven, how they are used and how well owners maintain them all change it, and wear items such as tyres and brake pads are common fails. Compare a model only with cars of the same age. Methodology and limits.

The all cars figures cover all class 4 vehicles (cars and light vans) tested at the same age.

Looking at a Audi A4?

These figures describe the model, not the car in front of you. Found one you might buy? See what the VetTheCar Buying Report covers, or use the tools that work without a registration.

See a sample report Car tools · MOT fail rates by model · Compare models by MOT record

Repair estimates: ONS consumer price quotes for local garage labour (09/2025 to 08/2026), the MOT inspection manual for defect wording, and estimated labour hours and parts bands. Not affiliated with or endorsed by ONS.

Source

Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.

Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources