Audi A6 S Line Black Ed 40 TDI SA (2020)
2020 Audi A6 S Line Black Ed 40 TDI SA
CarHunch analysed 810 real MOT records for the 2020 Audi A6 S Line Black Ed 40 TDI SA. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2020 Audi A6 diesel is slightly more reliable than the UK average, with an 82.2% first-time MOT pass rate versus the national 80%, and only 10.9% of vehicles have ever recorded a dangerous defect—well below the concerning threshold. The real strength lies in how few actual failures these cars rack up: just 0.24 failures per vehicle on average, suggesting serious problems are genuinely rare.
At 41,500 miles median, these A6s are still relatively young with modest wear, and the 2.1 advisories per vehicle tell you minor maintenance items crop up but nothing systemic. If you're considering one, have a pre-purchase inspection focus on the diesel particulate filter and fuel injectors, as German diesels of this age often need attention there—catching issues early will save money later.
What to check before buying a 2020 Audi A6 S Line Black Ed 40 TDI SA
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Audi A6 S Line Black Ed 40 TDI SA
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (100%) | 809 | 82.2% | 0.24 |
| Gas Bi-Fuel (0%) | 1 | 100% | 0 |
Mileage Distribution
Most 2020 Audi A6 S Line Black Ed 40 TDI SA vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2020 Audi A6 S Line Black Ed 40 TDI SA vehicles fall between 30,972 and 54,185 miles.
2020 Audi A6 S Line Black Ed 40 TDI SA — Still on the Road
Strong survival — 595 vehicles still getting MOTs in 2025, 92% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2022–2025.
MOT History Averages
Found a specific Audi A6 S Line Black Ed 40 TDI SA?
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