Should I check the MOT history before buying a 2021 Audi Q3 S Line 40 TDI Quattro S A?

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 Q3 S Line 40 TDI Quattro S A?

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 Q3 S Line 40 TDI Quattro S A?

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 Q3 S Line 40 TDI Quattro S A reliable?

Based on MOT data from 278 vehicles, the 2021 Audi Q3 S Line 40 TDI Quattro S A has a first-time MOT pass rate of 94.1%, 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 Q3 S Line 40 TDI Quattro S A?

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 Q3 S Line 40 TDI Quattro S A (2021)

278 real MOT outcomes analysed • 94.1% first-time pass rate

2021 Audi Q3 S Line 40 TDI Quattro S A

CarHunch analysed 278 real MOT records for the 2021 Audi Q3 S Line 40 TDI Quattro S A. 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 Still on the Road MOT Averages Colour Breakdown Compare Models

The 2021 Audi Q3 S Line 40 TDI Quattro is reliably passing its MOT at 92.8%, well ahead of the 80% UK average, and dangerous defects are uncommon at just 6.8% of vehicles. This diesel model shows solid durability across a sample of 278 cars.

These vehicles are running at a median of 30,852 miles for their age, which is typical, and they're averaging just 0.19 failures per test—meaning most pass cleanly. The 2.5 advisories per vehicle suggest minor wear items (likely suspension or brakes) rather than structural problems, so budget for routine maintenance but expect this Q3 to be a dependable performer if you find one in good service history.

We have limited data for the 2021 Audi Q3 S Line 40 TDI Quattro S A — treat the figures below as indicative rather than definitive.

⚠️ Around 1 in 20 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

94.1%

UK average ~80%

Better than average

Dangerous (ever)

6.8%

At least once in MOT history

Check this vehicle

Avg failures / car

0.19

Over 2.3 tests on record

Low

Typical mileage

31k

Middle half: 23k–40k

For context

These stats describe 278 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 278 Audi Q3 S Line 40 TDI Quattro S A cars.

Before you buy a 2021 Audi Q3 S Line 40 TDI Quattro S A

Based on MOT data from 278 vehicles — here's what to check.

📋 Check the full MOT history. 6.8% 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 1,047 Audi Q3 S Line 40 TDI Quattro S A vehicles registered in the UK — across all years. From DVLA registration records.

Grey 37.1%

388

Black 20%

209

Blue 19.9%

208

White 16.6%

174

Silver 3%

Red 1.9%

Orange 1.6%

Mileage Distribution

Most 2021 Audi Q3 S Line 40 TDI Quattro S A 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.

30,852

typical

23,398

low mileage

39,775

high mileage

Half of all 2021 Audi Q3 S Line 40 TDI Quattro S A vehicles fall between 23,398 and 39,775 miles.

Is the mileage you're seeing normal?

✓ Under 23,398 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.

✓ 23,398–39,775 miles — normal for age. This is where most 2021 Audi Q3 S Line 40 TDI Quattro S As sit.

⚠ Over 53,696 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2021 Audi Q3 S Line 40 TDI Quattro S A — Still on the Road

Almost all 2021 Audi Q3 S Line 40 TDI Quattro S As are still on the road.

Strong survival — 269 vehicles still getting MOTs in 2025, 100% of the peak.

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.

MOT History Averages

2.3

Avg MOT tests per vehicle

0.19

Avg failures per vehicle

2.5

Avg advisories per vehicle

Other model years — Audi Q3 S Line 40 TDI Quattro S A: All Q3 S Line 40 TDI Quattro S A years → Which year to buy? →

2020 2022 2023 2024

Or browse all models: Audi →

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