Audi S4

9,108 on UK roads in 2025-185 vs 2024

On the road

9,108

9,108 licensed

Change vs 2024

-2%

-185 cars

New in 2025

first-time registrations

Electrified

hybrid, plug-in & battery

The Audi S4 has a steady presence on UK roads, with 9,108 licensed in 2025 - down 2% on 2024. 66 were registered new in 2025. The fleet is overwhelmingly petrol (83%), with most in the Over 3.0L class. Most date from the 2015-2019 era.

How many are left?

Licensed Audi S4 cars on the road over time

New registrations

First-time registrations per year

What the typical Audi S4 looks like

Fuel, engine size and age across every Audi S4 on the road today.

Fuel mix

Current split

9,108total

Petrol83.5%
Diesel16.5%
Other0.1%

Engine size

Cars on the road by engine capacity

1.6-2.0L1
2.0-3.0L288
Over 3.0L8,819

How old are they?

Share of cars by the year they were first registered

Before 20002%
2000-20046%
2005-200911%
2010-201422%
2015-201945%
2020-202515%

MOT & reliability

2025 MOT data

How a Audi S4 holds up at its MOT and how it's driven - from 1,222 tests, tracked across 2022-2025.

First-time pass rate

Average for its class

83.4%

1,222 MOT tests in 2025 · 1,076 first-time

Pass rate over time

2022

80.2%

2023

82.7%

2024

82.3%

2025

83.4%

▲ 3.2 pts since 2022

Pass rate by age

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

How a Audi S4 is driven

tracked across 2022-25

How much it's driven

miles a year, from 1,172 cars tracked across years

4,480miles a year · low use

64.2%

low · <5k

34.1%

avg · 5-15k

1.6%

high · 15k+

Most cover 1,605-6,209 miles a year (median 3,702).

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)

99,867

56,322middle 50%: 74,947-120,099149,451

Typical odometer rising: 95,853 → 97,068 → 98,376 → 99,867

Holds up by mileage

Pass rate as the odometer climbs

Under 40k

97.8%

40-80k

88.3%

80-120k

80.3%

120k+

81.1%

Petrol vs diesel

First-time pass rate by fuel

Not enough data.

A 2025 Audi S4 passes first time 83.4% of the time - above the 77.6% UK average. The typical one is driven about 4,480 miles a year, and reliability is mostly about miles: 97.8% of low-mileage cars pass versus 81.1% past 120k.

Why a S4 fails its MOT

2025 MOT data

Of 179 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 S4 fails

Share of failed tests, by area

Suspension42.5%

Lamps & electrical27.9%

Tyres24.6%

Brakes18.4%

Exhaust & emissions17.3%

Visibility13.4%

Body & structure12.8%

Seat belts7.3%

Top specific defects

Exact items most often recorded as the reason a car failed

A suspension pin, bush or joint excessively worn31

A spring or spring component fractured or seriously weakened25

A tyre seriously damaged19

A tyre cords visible or damaged15

A suspension joint dust cover missing or no longer prevents the ingress of dirt etc15

Emissions levels exceed default limits13

The aim of a headlamp is not within limits laid down in the requirements12

Windscreen washers not working or not providing sufficient fluid to clear the windscreen12

A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc12

Tyre tread depth not in accordance with the requirements10

25.7% flagged dangerous·2.6 defects per fail·179 fails analysed

Audi S4 - frequently asked

How many Audi S4 are left in the UK?

There are 9,108 Audi S4 cars still licensed on UK roads in 2025, down 2% on 2024.

How many new Audi S4 were registered in 2025?

66 brand-new Audi S4 cars were first registered in 2025.

What fuel does the typical Audi S4 use?

Most are petrol - about 83% of all Audi S4 on the road, with the majority in the Over 3.0L engine class. In total, 0% are electrified (hybrid, plug-in or battery).

How old is the typical Audi S4?

Most Audi S4 cars on the road today date from the 2015-2019 era.

How reliable is the Audi S4?

83.4% of Audi S4 cars pass their MOT first time, compared with a UK average of 77.6% across all cars. The typical tested Audi S4 has around 95,857 miles on the clock.

Buying a Audi S4?

Before you buy a specific Audi S4, run its registration through AnalyzeMyCar for MOT history, mileage checks, service history and valuation.

Check a car

What the typical Audi S4 looks like

Fuel, engine size and age across every Audi S4 on the road today.

Fuel mix

Current split

9,108total

Petrol83.5%
Diesel16.5%
Other0.1%

Engine size

Cars on the road by engine capacity

1.6-2.0L1
2.0-3.0L288
Over 3.0L8,819

How old are they?

Share of cars by the year they were first registered

Before 20002%
2000-20046%
2005-200911%
2010-201422%
2015-201945%
2020-202515%

MOT & reliability

2025 MOT data

How a Audi S4 holds up at its MOT and how it's driven - from 1,222 tests, tracked across 2022-2025.

First-time pass rate

Average for its class

83.4%

1,222 MOT tests in 2025 · 1,076 first-time

Pass rate over time

2022

80.2%

2023

82.7%

2024

82.3%

2025

83.4%

▲ 3.2 pts since 2022

Pass rate by age

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

How a Audi S4 is driven

tracked across 2022-25

How much it's driven

miles a year, from 1,172 cars tracked across years

4,480miles a year · low use

64.2%

low · <5k

34.1%

avg · 5-15k

1.6%

high · 15k+

Most cover 1,605-6,209 miles a year (median 3,702).

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)

99,867

56,322middle 50%: 74,947-120,099149,451

Typical odometer rising: 95,853 → 97,068 → 98,376 → 99,867

Holds up by mileage

Pass rate as the odometer climbs

Under 40k

97.8%

40-80k

88.3%

80-120k

80.3%

120k+

81.1%

Petrol vs diesel

First-time pass rate by fuel

Not enough data.

Why a S4 fails its MOT

2025 MOT data

Of 179 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 S4 fails

Share of failed tests, by area

Suspension42.5%

Lamps & electrical27.9%

Tyres24.6%

Brakes18.4%

Exhaust & emissions17.3%

Visibility13.4%

Body & structure12.8%

Seat belts7.3%

Top specific defects

Exact items most often recorded as the reason a car failed

A suspension pin, bush or joint excessively worn31

A spring or spring component fractured or seriously weakened25

A tyre seriously damaged19

A tyre cords visible or damaged15

A suspension joint dust cover missing or no longer prevents the ingress of dirt etc15

Emissions levels exceed default limits13

The aim of a headlamp is not within limits laid down in the requirements12

Windscreen washers not working or not providing sufficient fluid to clear the windscreen12

A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc12

Tyre tread depth not in accordance with the requirements10

25.7% flagged dangerous·2.6 defects per fail·179 fails analysed

Audi S4 - frequently asked

How many Audi S4 are left in the UK?

There are 9,108 Audi S4 cars still licensed on UK roads in 2025, down 2% on 2024.

How many new Audi S4 were registered in 2025?

66 brand-new Audi S4 cars were first registered in 2025.

What fuel does the typical Audi S4 use?

Most are petrol - about 83% of all Audi S4 on the road, with the majority in the Over 3.0L engine class. In total, 0% are electrified (hybrid, plug-in or battery).

How old is the typical Audi S4?

Most Audi S4 cars on the road today date from the 2015-2019 era.

How reliable is the Audi S4?

83.4% of Audi S4 cars pass their MOT first time, compared with a UK average of 77.6% across all cars. The typical tested Audi S4 has around 95,857 miles on the clock.

Buying a Audi S4?

Before you buy a specific Audi S4, run its registration through AnalyzeMyCar for MOT history, mileage checks, service history and valuation.

Check a car