Should I check the MOT history before buying a 2021 Audi A6 S Line Black Ed 40 TDI SA?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2021 Audi A6 S Line Black Ed 40 TDI SA?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2021 Audi A6 S Line Black Ed 40 TDI SA?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

Is the 2021 Audi A6 S Line Black Ed 40 TDI SA reliable?

Based on MOT data from 703 vehicles, the 2021 Audi A6 S Line Black Ed 40 TDI SA has a first-time MOT pass rate of 92.1%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

Do I need an HPI check when buying a 2021 Audi A6 S Line Black Ed 40 TDI SA?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Audi A6 S Line Black Ed 40 TDI SA (2021)

703 real MOT outcomes analysed • 92.1% first-time pass rate

2021 Audi A6 S Line Black Ed 40 TDI SA

CarHunch analysed 703 real MOT records for the 2021 Audi A6 S Line Black Ed 40 TDI SA. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Check a Specific Reg Buyer's Checklist Mileage Distribution MOT Averages Colour Breakdown Compare Models

This 2021 A6 S LINE achieves an 81.8% first-time MOT pass rate, fractionally ahead of the UK average of 80%, and only 9.4% of tested examples have ever recorded a dangerous defect—well below the threshold for real concern. The diesel engine is proving reasonably robust so far in its lifecycle.

These cars are running at modest mileage for their age (median 39,536 miles), which partly explains the solid pass rate; owners are averaging just 0.22 failures per vehicle, though the 1.4 advisories per car suggest minor wear items are starting to appear. Check the service history closely and have a pre-purchase inspection focus on suspension and electrical systems, as these typically drive advisory counts on this platform.

The 2021 Audi A6 S Line Black Ed 40 TDI SA passes its MOT first time more often than most UK vehicles (92.1% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ About 1 in 12 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

92.1%

UK average ~80%

Better than average

Dangerous (ever)

9.4%

At least once in MOT history

Check this vehicle

Avg failures / car

0.22

Over 2.1 tests on record

Low

Typical mileage

40k

Middle half: 30k–50k

For context

✅ Good baseline reliability. A 92.1% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 703 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.

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See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 703 Audi A6 S Line Black Ed 40 TDI SA cars.

Before you buy a 2021 Audi A6 S Line Black Ed 40 TDI SA

Based on MOT data from 703 vehicles — here's what to check.

📋 Check the full MOT history. 9.4% 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.
🔍 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 →
📄 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 Get 20% off via CarHunch

Colour Breakdown

Based on 1,886 Audi A6 S Line Black Ed 40 TDI SA vehicles registered in the UK — across all years. From DVLA registration records.

Grey 37.4%

706

Black 31.1%

586

White 16.6%

314

Blue 7.2%

135

Silver 6%

113

Red 1.7%

Mileage Distribution

Most 2021 Audi A6 S Line Black Ed 40 TDI SA 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.

39,536

typical

30,118

low mileage

49,779

high mileage

Half of all 2021 Audi A6 S Line Black Ed 40 TDI SA vehicles fall between 30,118 and 49,779 miles.

Is the mileage you're seeing normal?

✓ Under 30,118 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 30,118–49,779 miles — normal for age. This is where most 2021 Audi A6 S Line Black Ed 40 TDI SAs sit.

⚠ Over 67,201 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

MOT History Averages

2.1

Avg MOT tests per vehicle

0.22

Avg failures per vehicle

1.4

Avg advisories per vehicle

Other model years — Audi A6 S Line Black Ed 40 TDI SA: All A6 S Line Black Ed 40 TDI SA years → Which year to buy? →

2019 2020

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