Audi A4 S Line TDI 140 (2006)
2006 Audi A4 S Line TDI 140
CarHunch analysed 548 real MOT records for the 2006 Audi A4 S Line TDI 140.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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This 2006 A4 S Line TDI 140 is a reliability concern: only 55.2% pass their MOT first time, well below the UK average of 80%, and the median CarHunch score of 50 reflects a genuinely problematic cohort. The good news is that dangerous defects are rare (0%), but owners should expect almost one failure per test on average, suggesting wear and mechanical issues are the norm rather than the exception.
At nearly 157,500 miles on the clock, these cars have covered substantial mileage for their age, which explains some of the struggle—but a 55% pass rate remains poor even accounting for that. Before buying, have a pre-purchase inspection focus on the common failure patterns (likely suspension, exhaust, and fluid leaks on TDI engines of this era), and budget for remedial work rather than assuming a "clean" example.
The 2006 Audi A4 S Line TDI 140 passes its MOT first time at roughly the UK average rate (77.4%) — solid but worth checking this vehicle's history carefully.
These stats describe 548 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 548 Audi A4 S Line TDI 140 cars.
Before you buy a 2006 Audi A4 S Line TDI 140
Based on MOT data from 548 vehicles — here's what to check.
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Check the full MOT history.
0% of these vehicles have had a dangerous defect recorded -
recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle. -
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Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price.
Inspection
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Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically.
History
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (99%) | 541 | 77.3% | 0.94 |
Colour Breakdown
Based on 1,016 Audi A4 S Line TDI 140 vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2006 Audi A4 S Line TDI 140 vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2006 Audi A4 S Line TDI 140 vehicles fall between 135,601 and 175,224 miles.
2006 Audi A4 S Line TDI 140 — Still on the Road
Numbers are thinning — 27% of 2006 Audi A4 S Line TDI 140s are still active.
Numbers are declining — 94 vehicles still getting MOTs in 2025 (27% of peak).
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2017–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.
MOT History Averages
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