Audi S4 — reported problems

What owners report: issue areas

Owner complaints are classified by the system they concern: 1,366 classifications in all. One complaint can concern several systems, so these add up to more than the number of complaints.

• Electrical system300 (22.0%)
• Powertrain (transmission & drivetrain)204 (14.9%)
• Brakes156 (11.4%)
• Lights132 (9.7%)Official recall records for this system: 2, covering model years 2004.
• Engine116 (8.5%)
• Tires & wheels98 (7.2%)Official recall records for this system: 3, covering model years 2020–2024.

Other / uncategorized: 34 classifications (2.5%) were not assigned to a specific system by the source. They are counted but not treated as an issue area.

These are counts of records held by CarFaultIQ, not a failure rate. More records can simply mean more vehicles were sold or more owners reported. No vehicles-in-service figure exists in this data, so no reliability or risk score can be derived from it.

What the records are about, by source

Each source is kept separate: owner complaints, recalls, manufacturer communications and investigations are different kinds of record and are never added together. All model years.

• Owner complaints (1,116 records, model years 2000–2022) are most frequently classified under: electrical system, powertrain (transmission & drivetrain) and brakes.
• Manufacturer communications (15,566 records, model years 2000–2025) are most frequently classified under: equipment & accessories, electrical system and engine.

"Most frequently classified under" reports how the records are filed by the source. It is not a finding about causes, and a record can be filed under more than one system. Read the individual records

Mileage reported when the issue occurred

• 752reports included a mileage
• 57,028average of those mileages

This is the mileage owners recorded at the time they reported, not an expected failure mileage and not a prediction for any individual vehicle. The lowest and highest figures on record are not shown: they are unverified odometer entries that include zeros and implausibly high readings, so they would not describe a real range. A median is not shown either, because the stored figures are group totals and a median cannot be recovered from them.

Evidence by model year

Records held per model year. Select a year to narrow this page to it.

1. 2000 221 records for 2000 221
2. 2001 164 records for 2001 164
3. 2002 110 records for 2002 110
4. 2004 152 records for 2004 152
5. 2005 258 records for 2005 258
6. 2006 266 records for 2006 266
7. 2007 267 records for 2007 267
8. 2008 323 records for 2008 323
9. 2009 232 records for 2009 232
10. 2010 738 records for 2010 738
11. 2011 795 records for 2011 795
12. 2012 809 records for 2012 809
13. 2013 901 records for 2013 901
14. 2014 732 records for 2014 732
15. 2015 677 records for 2015 677
16. 2016 504 records for 2016 504
17. 2018 782 records for 2018 782
18. 2019 811 records for 2019 811
19. 2020 930 records for 2020 930
20. 2021 944 records for 2021 944
21. 2022 835 records for 2022 835
22. 2023 815 records for 2023 815
23. 2024 758 records for 2024 758
24. 2025 503 records for 2025 503

Counts are not adjusted for how many vehicles were sold in each year, so a taller year is not necessarily a worse year.

Reports mentioning outcomes

• 30mention a crash
• 8mention a fire
• 20mention an injury

These are counts of records whose report mentioned the outcome. They are not a severity rating and not a safety assessment of this vehicle.

Official records held

• Safety recalls NHTSA 43
• Manufacturer communications NHTSA 15,566
• Transport Canada recalls Transport Canada 54
• Owner complaints NHTSA 1,116

Explore the underlying evidence records

Diagnostic codes found in evidence for this vehicle

These codes appear by explicit identifier in official records matched to this exact model and year.

• P0135 in 24 records · 2010–2012
• P0101 in 18 records · 2004–2008
• P0102 in 18 records · 2004–2008
• P0113 in 18 records · 2004–2008
• P0301 in 18 records · 2011–2013
• P0103 in 10 records · 2002–2008
• P0501 in 10 records · 2010–2014
• P0700 in 10 records · 2010–2014
• P0112 in 9 records · 2004–2008
• P060A in 5 records · 2010–2014
• P0715 in 5 records · 2010–2014
• P0716 in 5 records · 2010–2014

A code appearing in a record means the code was named in that document. It is not a diagnosis of this vehicle, not a fault this vehicle has, and not an indication of urgency. Diagnosis requires reading live data from the vehicle.