Audi A4

245,933 on UK roads in 2025-17,312 vs 2024

On the road

246k

245,933 licensed

Change vs 2024

-6.6%

-17,312 cars

New in 2025

593

first-time registrations

Electrified

hybrid, plug-in & battery

The Audi A4 is a common sight on UK roads, with 245,933 licensed in 2025 - down 6.6% on 2024. 593 were registered new in 2025. The fleet is overwhelmingly diesel (66%), with most in the 2.0-3.0L class. Most date from the 2015-2019 era.

How many are left?

Licensed Audi A4 cars on the road over time

New registrations

First-time registrations per year

What the typical Audi A4 looks like

Fuel, engine size and age across every Audi A4 on the road today.

Fuel mix

Current split

246ktotal

Petrol33.6%
Diesel66.4%
Hybrid0.0%
Other0.0%

Engine size

Cars on the road by engine capacity

Under 1.0L3
1.0-1.6L15,254
1.6-2.0L19,948
2.0-3.0L201k
Over 3.0L9,440

How old are they?

Share of cars by the year they were first registered

Before 20000%
2000-20043%
2005-200918%
2010-201429%
2015-201934%
2020-202515%

MOT & reliability

2025 MOT data

How a Audi A4 holds up at its MOT and how it's driven - from 273,917 tests, tracked across 2022-2025.

First-time pass rate

Average for its class

76.4%

273,917 MOT tests in 2025 · 226,037 first-time

Pass rate over time

2022

78%

2023

77.3%

2024

76.8%

2025

76.4%

▼ 1.6 pts since 2022

Pass rate by age

First-time pass rate by the car's age (tested in 2025)

How a Audi A4 is driven

tracked across 2022-25

How much it's driven

miles a year, from 261,501 cars tracked across years

7,965miles a year · average use

29.2%

low · <5k

62.9%

avg · 5-15k

7.8%

high · 15k+

Most cover 4,536-10,384 miles a year (median 7,158).

Miles driven by age

Yearly mileage as the car ages

Driven most when newer, easing as it gets older.

Mileage & condition

Typical mileage at test

Odometer when tested (2025)

110,754

50,367middle 50%: 73,054-142,676176,637

Typical odometer rising: 100,611 → 103,203 → 106,941 → 110,754

Holds up by mileage

Pass rate as the odometer climbs

Under 40k

89.5%

40-80k

82.7%

80-120k

75.9%

120k+

71.3%

Petrol vs diesel

First-time pass rate by fuel

Diesel

150,941 tests

74.6%

Petrol

75,076 tests

80.2%

A 2025 Audi A4 passes first time 76.4% of the time - below the 77.6% UK average, and easing slightly year on year. The typical one is driven about 7,965 miles a year, and reliability is mostly about miles: 89.5% of low-mileage cars pass versus 71.3% past 120k.

Why a A4 fails its MOT

2025 MOT data

Of 53,238 first-time fails, here's what gets flagged most. Most cars fail on more than one item, so shares add up past 100%.

Where a A4 fails

Share of failed tests, by area

Suspension44.8%

Tyres30.9%

Lamps & electrical23.7%

Brakes20.4%

Body & structure18.9%

Exhaust & emissions12.2%

Visibility9.8%

Steering5.4%

Top specific defects

Exact items most often recorded as the reason a car failed

A spring or spring component fractured or seriously weakened10,574

A suspension pin, bush or joint excessively worn8,757

A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc7,471

Tyre tread depth not in accordance with the requirements7,018

A tyre seriously damaged6,110

The aim of a headlamp is not within limits laid down in the requirements5,385

Engine MIL illuminated indicating a malfunction4,282

A tyre cords visible or damaged3,983

A brake lining or pad worn below 1.5mm3,413

A shock absorber damaged to the extent that it does not function or showing signs of severe leakage2,757

33.2% flagged dangerous·2.5 defects per fail·53,238 fails analysed

Audi A4 - frequently asked

How many Audi A4 are left in the UK?

There are 245,933 Audi A4 cars still licensed on UK roads in 2025, down 6.6% on 2024.

How many new Audi A4 were registered in 2025?

593 brand-new Audi A4 cars were first registered in 2025.

What fuel does the typical Audi A4 use?

Most are diesel - about 66% of all Audi A4 on the road, with the majority in the 2.0-3.0L engine class. In total, 0% are electrified (hybrid, plug-in or battery).

How old is the typical Audi A4?

Most Audi A4 cars on the road today date from the 2015-2019 era.

How reliable is the Audi A4?

76.4% of Audi A4 cars pass their MOT first time, compared with a UK average of 77.6% across all cars. The typical tested Audi A4 has around 105,978 miles on the clock.

Buying a Audi A4?

Before you buy a specific Audi A4, run its registration through AnalyzeMyCar for MOT history, mileage checks, service history and valuation.

Check a car

What the typical Audi A4 looks like

Fuel, engine size and age across every Audi A4 on the road today.

Fuel mix

Current split

246ktotal

Petrol33.6%
Diesel66.4%
Hybrid0.0%
Other0.0%

Engine size

Cars on the road by engine capacity

Under 1.0L3
1.0-1.6L15,254
1.6-2.0L19,948
2.0-3.0L201k
Over 3.0L9,440

How old are they?

Share of cars by the year they were first registered

Before 20000%
2000-20043%
2005-200918%
2010-201429%
2015-201934%
2020-202515%

MOT & reliability

2025 MOT data

How a Audi A4 holds up at its MOT and how it's driven - from 273,917 tests, tracked across 2022-2025.

First-time pass rate

Average for its class

76.4%

273,917 MOT tests in 2025 · 226,037 first-time

Pass rate over time

2022

78%

2023

77.3%

2024

76.8%

2025

76.4%

▼ 1.6 pts since 2022

Pass rate by age

First-time pass rate by the car's age (tested in 2025)

How a Audi A4 is driven

tracked across 2022-25

How much it's driven

miles a year, from 261,501 cars tracked across years

7,965miles a year · average use

29.2%

low · <5k

62.9%

avg · 5-15k

7.8%

high · 15k+

Most cover 4,536-10,384 miles a year (median 7,158).

Miles driven by age

Yearly mileage as the car ages

Driven most when newer, easing as it gets older.

Mileage & condition

Typical mileage at test

Odometer when tested (2025)

110,754

50,367middle 50%: 73,054-142,676176,637

Typical odometer rising: 100,611 → 103,203 → 106,941 → 110,754

Holds up by mileage

Pass rate as the odometer climbs

Under 40k

89.5%

40-80k

82.7%

80-120k

75.9%

120k+

71.3%

Petrol vs diesel

First-time pass rate by fuel

Diesel

150,941 tests

74.6%

Petrol

75,076 tests

80.2%

Why a A4 fails its MOT

2025 MOT data

Of 53,238 first-time fails, here's what gets flagged most. Most cars fail on more than one item, so shares add up past 100%.

Where a A4 fails

Share of failed tests, by area

Suspension44.8%

Tyres30.9%

Lamps & electrical23.7%

Brakes20.4%

Body & structure18.9%

Exhaust & emissions12.2%

Visibility9.8%

Steering5.4%

Top specific defects

Exact items most often recorded as the reason a car failed

A spring or spring component fractured or seriously weakened10,574

A suspension pin, bush or joint excessively worn8,757

A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc7,471

Tyre tread depth not in accordance with the requirements7,018

A tyre seriously damaged6,110

The aim of a headlamp is not within limits laid down in the requirements5,385

Engine MIL illuminated indicating a malfunction4,282

A tyre cords visible or damaged3,983

A brake lining or pad worn below 1.5mm3,413

A shock absorber damaged to the extent that it does not function or showing signs of severe leakage2,757

33.2% flagged dangerous·2.5 defects per fail·53,238 fails analysed

Audi A4 - frequently asked

How many Audi A4 are left in the UK?

There are 245,933 Audi A4 cars still licensed on UK roads in 2025, down 6.6% on 2024.

How many new Audi A4 were registered in 2025?

593 brand-new Audi A4 cars were first registered in 2025.

What fuel does the typical Audi A4 use?

Most are diesel - about 66% of all Audi A4 on the road, with the majority in the 2.0-3.0L engine class. In total, 0% are electrified (hybrid, plug-in or battery).

How old is the typical Audi A4?

Most Audi A4 cars on the road today date from the 2015-2019 era.

How reliable is the Audi A4?

76.4% of Audi A4 cars pass their MOT first time, compared with a UK average of 77.6% across all cars. The typical tested Audi A4 has around 105,978 miles on the clock.

Buying a Audi A4?

Before you buy a specific Audi A4, run its registration through AnalyzeMyCar for MOT history, mileage checks, service history and valuation.

Check a car