Should I check the MOT history before buying a 2021 Audi Q8 S Line 50tdi MHEV Quattro 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 Q8 S Line 50tdi MHEV Quattro 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 Q8 S Line 50tdi MHEV Quattro 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 Q8 S Line 50tdi MHEV Quattro A reliable?

Based on MOT data from 277 vehicles, the 2021 Audi Q8 S Line 50tdi MHEV Quattro A has a first-time MOT pass rate of 94.8%, 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 Q8 S Line 50tdi MHEV Quattro 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 Q8 S Line 50tdi MHEV Quattro A (2021)

277 real MOT outcomes analysed • 94.8% first-time pass rate

2021 Audi Q8 S Line 50tdi MHEV Quattro A

CarHunch analysed 277 real MOT records for the 2021 Audi Q8 S Line 50tdi MHEV Quattro 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 Pass Rate by Fuel Mileage Distribution MOT Averages Colour Breakdown Compare Models

The 2021 Audi Q8 50TDI is a genuinely reliable proposition, posting a 90% first-time pass rate that comfortably beats the UK average of 80%, and dangerous defects are rare at just 4.3% of vehicles ever flagged. This diesel-only cohort shows no weak spots between fuel types, since virtually all examples run the TDI engine.

At 38,965 miles average for a three-year-old car, these Q8s are running well within expected mileage, which supports their strong pass performance. The 0.15 average failures per test and 1.3 advisories suggest routine maintenance keeps issues at bay—if you're considering one, check the service history closely to confirm that pattern has been followed.

We have limited data for the 2021 Audi Q8 S Line 50tdi MHEV Quattro A — treat the figures below as indicative rather than definitive.

First-time pass

94.8%

UK average ~80%

Better than average

Dangerous (ever)

4.3%

At least once in MOT history

Check this vehicle

Avg failures / car

0.15

Over 2 tests on record

Low

Typical mileage

37k

Middle half: 29k–48k

For context

These stats describe 277 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 277 Audi Q8 S Line 50tdi MHEV Quattro A cars.

Before you buy a 2021 Audi Q8 S Line 50tdi MHEV Quattro A

Based on MOT data from 277 vehicles — here's what to check.

📋 Check the full MOT history. 4.3% 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

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Diesel (99%)	275	94.8%	0.15

Colour Breakdown

Based on 780 Audi Q8 S Line 50tdi MHEV Quattro A vehicles registered in the UK — across all years. From DVLA registration records.

Black 38.8%

303

Grey 25.8%

201

Blue 21.4%

167

White 6.4%

Silver 6.3%

Orange 0.6%

Red 0.6%

Mileage Distribution

Most 2021 Audi Q8 S Line 50tdi MHEV Quattro 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.

37,047

typical

28,690

low mileage

47,737

high mileage

Half of all 2021 Audi Q8 S Line 50tdi MHEV Quattro A vehicles fall between 28,690 and 47,737 miles.

Is the mileage you're seeing normal?

✓ Under 28,690 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.

✓ 28,690–47,737 miles — normal for age. This is where most 2021 Audi Q8 S Line 50tdi MHEV Quattro As sit.

⚠ Over 64,444 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

Avg MOT tests per vehicle

0.15

Avg failures per vehicle

1.3

Avg advisories per vehicle

Other model years — Audi Q8 S Line 50tdi MHEV Quattro A: All Q8 S Line 50tdi MHEV Quattro A years → Which year to buy? →

2023

Or browse all models: Audi →

Compare with another model

See how the 2021 Audi Q8 S Line 50tdi MHEV Quattro A stacks up against a rival.

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