Should I check the MOT history before buying a 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV 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 A4 S Ln Blk Ed 40 TFSI MHEV 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 A4 S Ln Blk Ed 40 TFSI MHEV 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 A4 S Ln Blk Ed 40 TFSI MHEV SA reliable?

Based on MOT data from 421 vehicles, the 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV SA has a first-time MOT pass rate of 92.6%, 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 A4 S Ln Blk Ed 40 TFSI MHEV 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 A4 S Ln Blk Ed 40 TFSI MHEV SA (2021)

421 real MOT outcomes analysed • 92.6% first-time pass rate

2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV SA

CarHunch analysed 421 real MOT records for the 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV 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 Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

Moderate sample. 421 vehicles on record. Figures are indicative — the specific vehicle's history matters more than these averages.

This 2021 Audi A4 S is a strong performer on the MOT, with a 91.5% first-time pass rate that's comfortably ahead of the UK average of 80%, and only 14% of vehicles have ever recorded a dangerous defect—a reassuringly low figure. The petrol engine variant (which makes up virtually all the cohort) passes at 91.4%, showing excellent consistency across the sample.

At a median mileage of 29,642 miles for cars now around three years old, these A4s have been driven relatively gently, which goes some way to explaining the strong pass performance. The average car racks up just 0.24 failures and 1.5 advisories per test, suggesting mechanically sound vehicles with only minor wear items flagged—if you're buying one, a pre-purchase inspection should still cover the suspension and electrical systems, where advisory patterns often concentrate on this model generation.

The 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV SA passes its MOT first time more often than most UK vehicles (92.6% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.

⚠️ Around 1 in 8 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

92.6%

UK average ~80%

Better than average

Dangerous (ever)

14%

At least once in MOT history

Check this vehicle

Avg failures / car

0.24

Over 2.4 tests on record

Low

Typical mileage

30k

Middle half: 23k–38k

For context

✅ Good baseline reliability. A 92.6% first-time pass rate puts this well above the UK average — it's a well-sorted vehicle in this age bracket.

🔧 Expect consumable spend. An average of 1.5 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 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 421 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 421 Audi A4 S Ln Blk Ed 40 TFSI MHEV SA cars.

Before you buy a 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV SA

Based on MOT data from 421 vehicles — here's what to check.

📋 Check the full MOT history. 14% 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
Petrol (99%)	415	92.5%	0.24

Colour Breakdown

Based on 3,003 Audi A4 S Ln Blk Ed 40 TFSI MHEV SA vehicles registered in the UK — across all years. From DVLA registration records.

Grey 34.2%

1,026

Black 27.8%

836

Blue 22.9%

687

White 13%

390

Red 2.1%

Mileage Distribution

Most 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV 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.

29,642

typical

23,244

low mileage

37,636

high mileage

Half of all 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV SA vehicles fall between 23,244 and 37,636 miles.

Is the mileage you're seeing normal?

✓ Under 23,244 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.

✓ 23,244–37,636 miles — normal for age. This is where most 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV SAs sit.

⚠ Over 50,808 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 A4 S Ln Blk Ed 40 TFSI MHEV SA — Still on the Road

Almost all 2021 Audi A4 S Ln Blk Ed 40 TFSI MHEV SAs are still on the road.

Strong survival — 397 vehicles still getting MOTs in 2025, 98% 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

2.4

Avg MOT tests per vehicle

0.24

Avg failures per vehicle

1.5

Avg advisories per vehicle

Other model years — Audi A4 S Ln Blk Ed 40 TFSI MHEV SA: All A4 S Ln Blk Ed 40 TFSI MHEV SA years → Which year to buy? →

2020 2022 2023 2024

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