Should I check the MOT history before buying a 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV?

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 Line Blk Ed 35 TFSI MHEV?

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 Line Blk Ed 35 TFSI MHEV?

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 Line Blk Ed 35 TFSI MHEV reliable?

Based on MOT data from 464 vehicles, the 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV has a first-time MOT pass rate of 93%, 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 Line Blk Ed 35 TFSI MHEV?

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 Line Blk Ed 35 TFSI MHEV (2021)

464 real MOT outcomes analysed • 93% first-time pass rate

2021 Audi A4 S Line Blk Ed 35 TFSI MHEV

CarHunch analysed 464 real MOT records for the 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV. 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. 464 vehicles on record. Figures are indicative — the specific vehicle's history matters more than these averages.

This 2021 Audi A4 S Line is significantly more reliable than the UK average, with a 91.6% first-time pass rate well above the 80% benchmark—a genuinely strong result. The 12.5% dangerous defect rate is acceptable and not a major buyer concern for this model.

At 30,362 miles median, these cars are running relatively light for their age, and they're averaging just 0.22 failures per vehicle, suggesting the petrol engine is holding up well. With 1.6 advisories per car on average, expect minor wear items rather than structural problems; have the brake fluid and cabin filter checked during your first service, as these are typical early advisories on this generation.

The 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV passes its MOT first time more often than most UK vehicles (93% 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

93%

UK average ~80%

Better than average

Dangerous (ever)

12.5%

At least once in MOT history

Check this vehicle

Avg failures / car

0.22

Over 2.3 tests on record

Low

Typical mileage

30k

Middle half: 24k–40k

For context

✅ Good baseline reliability. A 93% 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 1.6 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 464 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 464 Audi A4 S Line Blk Ed 35 TFSI MHEV cars.

Before you buy a 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV

Based on MOT data from 464 vehicles — here's what to check.

📋 Check the full MOT history. 12.5% 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 (98%)	454	92.9%	0.23

Colour Breakdown

Based on 729 Audi A4 S Line Blk Ed 35 TFSI MHEV vehicles registered in the UK — across all years. From DVLA registration records.

White 39.1%

285

Grey 28.4%

207

Black 18.2%

133

Blue 11.7%

Red 2.6%

Mileage Distribution

Most 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV 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.

30,362

typical

23,658

low mileage

40,247

high mileage

Half of all 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV vehicles fall between 23,658 and 40,247 miles.

Is the mileage you're seeing normal?

✓ Under 23,658 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.

✓ 23,658–40,247 miles — normal for age. This is where most 2021 Audi A4 S Line Blk Ed 35 TFSI MHEVs sit.

⚠ Over 54,333 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 Line Blk Ed 35 TFSI MHEV — Still on the Road

Almost all 2021 Audi A4 S Line Blk Ed 35 TFSI MHEVs are still on the road.

Strong survival — 454 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

0.22

Avg failures per vehicle

1.6

Avg advisories per vehicle

Other model years — Audi A4 S Line Blk Ed 35 TFSI MHEV: All A4 S Line Blk Ed 35 TFSI MHEV years → Which year to buy? →

2020 2022

Or browse all models: Audi →

Compare with another model

See how the 2021 Audi A4 S Line Blk Ed 35 TFSI MHEV stacks up against a rival.

A solid choice — agree?