At a Glance
The Audi A4 B7 has 1 identified problem that occur more often than the UK average, with Compression ignition emissions above threshold being the most reported. Electrical is the most common MOT failure category. Based on 1.2M MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on this model than the UK average — confirmed at 99% statistical confidence. Read how we calculate MOT pass rates and problems →
Below: the full MOT-data picture for the Audi A4 B7 — MOT pass rate vs the UK average, common problems vs UK fleet patterns, the most likely MOT failures by frequency, fault occurrence by mileage band, and pass/fail trends. All numbers drawn from DVSA records.
Audi A4 B7 MOT Pass Rate
Across 1.2M MOT tests from DVSA data, the Audi A4 B7 (2004–2009) has a fail rate of 30.4%.
UK average fail rate (2006–2009): 38.3%
Common Audi A4 B7 Problems
Owner-submitted reports plus patterns we've identified across 559 million UK MOT tests. Each MOT-derived item below — whether tagged as a Problem, Wear & Tear or Consumable — shows up noticeably more often on this generation than across the UK fleet, which is why it's here. Owner reports are pinned to the top by default; use the sort and filter pills below to view a specific tier or change the order.
Compression ignition emissions above threshold
3,825
occurrences
Tell Us About Your Problem
Help other Audi A4 B7 owners — report a problem and we'll add it to the database
Tell Us About Your Problem
Help other Audi A4 B7 owners — report a problem and we'll add it to the database
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Problems by mileage
Common problems, MOT failures and advisories on the Audi A4 B7, grouped by the mileage they typically appear at.
794 distinct problems · 3,020,211 total occurrences in current filter
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Advisory items are MOT tester observations. Frequency can be influenced by driving style and usage patterns.
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Other Audi A4 Generations
B5
1994–2001
0 problems
B6
2000–2006
2 problems
B7
2004–2009
1 problem
Current page
B8
2007–2016
2 problems
B9
2015–2025
0 problems
Frequently Asked Questions
What are the most common Audi A4 B7 problems?
Based on DVSA MOT data for the Audi A4 B7 (2004–2009), we have identified 1 common problem. The most frequently reported is "Compression ignition emissions above threshold". Electrical is the most common MOT failure category.
How reliable is the Audi A4 B7?
This generation has 1.2M MOT tests on record with a 30.4% fail rate. A fault is flagged as a "Common Problem" only when it occurs significantly more often on this model than the UK average, confirmed at 99% statistical confidence.
What commonly fails the MOT on a Audi A4 B7?
There are 192 distinct MOT failure types recorded for the B7 (2004–2009), grouped by the mileage these failures typically occur. See the Common MOT Failures section on this page.
Can I report a problem with my Audi A4 B7?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Audi A4 owners spot problems early. All submissions are reviewed before being added to the public database.
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