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Audi A4 Common Problems, Faults & Repair Costs (2026)

Based on official DVSA MOT test data. View the most common MOT failure categories, pass rates, and estimated repair costs for the Audi A4 (1997–present).

MOT Pass Rate

79.8%2.2% below national avg (82%)

Reliability rating: Good — based on approx. 85,000 tests

Dangerous Defects

1.80%

Moderate risk

Retest Rate

14.0%

of failed tests need a retest

Top MOT Failure Categories

1

Lamps, reflectors and electrical equipment

Est. repair: £40–£200

15.8%
2

Suspension

Est. repair: £120–£450

15.0%
3

Brakes

Est. repair: £100–£350

12.8%
4

Tyres

Est. repair: £50–£120 per tyre

10.2%
5

Exhaust, fuel and emissions

Est. repair: £40–£200

9.0%

Where Faults Occur

30.0%

Front

29.0%

Rear

21.0%

Offside

Mileage Benchmarks

At 3 years

28,000 mi

At 5 years

46,000 mi

At 10 years

90,000 mi

Significantly higher or lower mileage than these benchmarks may indicate unusual usage patterns. Check the full MOT history for mileage consistency.

Is a Audi A4 a Good Buy?

The Audi A4 shows average reliability in MOT data. With a 79.8% pass rate, it sits 2.2% below the national average of 82%.

Budget for potential repairs in lamps, reflectors and electrical equipment and suspension. An independent pre-purchase inspection is recommended, especially for older examples. Always check the full MOT history for recurring issues.

Audi A4 MOT Check & History

View detailed MOT pass rates by year, mileage benchmarks, and full test history data for the Audi A4.

View Audi A4 MOT Data

Check a Specific Audi A4

Enter a registration number to view the full MOT history for any Audi A4.

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Other Audi Models

Audi A3

81.2%

Lamps, reflectors and electrical equipment →

Audi A1

83.5%

Lamps, reflectors and electrical equipment →

Audi Q3

84.2%

Lamps, reflectors and electrical equipment →

Audi Q5

83.0%

Lamps, reflectors and electrical equipment →

Audi A5

82.2%

Lamps, reflectors and electrical equipment →

Audi A6

78.5%

Lamps, reflectors and electrical equipment →

View all Audi models

Frequently Asked Questions

What are the most common MOT faults on a Audi A4?
The top MOT failure on the Audi A4 is Lamps, reflectors and electrical equipment, accounting for approximately 15.8% of all failures. Other common issues include suspension and brakes.
What is the Audi A4 MOT pass rate?
The Audi A4 has an estimated MOT pass rate of 79.8%, which is 2.2% below the national average of 82%. This rates the Audi A4 as "Good" for MOT reliability.
Is the Audi A4 reliable?
Based on DVSA MOT data, the Audi A4 has a good reliability record with a 79.8% pass rate. It has a dangerous defect rate of 1.80% and a retest rate of 14.0%.
How much does it cost to fix common Audi A4 MOT failures?
Typical repair costs for Audi A4 MOT failures range from £30–£200 for lamps, reflectors and electrical equipment issues to £120–£450 for suspension problems. Prices are estimates based on typical UK independent garage rates.
What mileage should a Audi A4 have?
Based on MOT test data, the average Audi A4 covers approximately 28,000 mi by 3 years, 46,000 mi by 5 years, and 90,000 mi by 10 years. Significantly higher or lower mileage may warrant closer inspection.
Should I buy a used Audi A4?
The Audi A4 is generally a solid choice based on MOT data. Check the full MOT history of any specific vehicle before purchasing, paying particular attention to lamps, reflectors and electrical equipment issues and mileage consistency.
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