Should I check the MOT history before buying a 2021 Audi A3 S Line 30 TFSI?

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 A3 S Line 30 TFSI?

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 A3 S Line 30 TFSI?

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 A3 S Line 30 TFSI reliable?

Based on MOT data from 1,248 vehicles, the 2021 Audi A3 S Line 30 TFSI has a first-time MOT pass rate of 93.9%, 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 A3 S Line 30 TFSI?

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 A3 S Line 30 TFSI (2021)

1,248 real MOT outcomes analysed • 93.9% first-time pass rate

2021 Audi A3 S Line 30 TFSI

CarHunch analysed 1,248 real MOT records for the 2021 Audi A3 S Line 30 TFSI. 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

This 2021 Audi A3 S Line 30 TFSI is substantially more reliable than the UK average, with a 93.1% first-time pass rate against the national 80% benchmark—a strong signal for potential buyers. Only 8.2% of vehicles have ever recorded a dangerous defect, which is reassuringly low and well below the threshold for real concern.

At just over 28,000 miles median mileage for a three-year-old car, these examples are lightly used, which explains the excellent pass rates and the modest 0.19 failures per vehicle on average. The 1.8 advisories per car suggest minor wear items are cropping up, so budget for routine maintenance and get a pre-purchase inspection to flag any that need addressing immediately.

The 2021 Audi A3 S Line 30 TFSI passes its MOT first time more often than most UK vehicles (93.9% 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

93.9%

UK average ~80%

Better than average

Dangerous (ever)

8.2%

At least once in MOT history

Check this vehicle

Avg failures / car

0.19

Over 2.3 tests on record

Low

Typical mileage

28k

Middle half: 22k–36k

For context

✅ Good baseline reliability. A 93.9% 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 1.8 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 1,248 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 1,248 Audi A3 S Line 30 TFSI cars.

Before you buy a 2021 Audi A3 S Line 30 TFSI

Based on MOT data from 1,248 vehicles — here's what to check.

📋 Check the full MOT history. 8.2% 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 (95%)	1,184	93.7%	0.2
Other (5%)	64	99.2%	0.02

Colour Breakdown

Based on 8,413 Audi A3 S Line 30 TFSI vehicles registered in the UK — across all years. From DVLA registration records.

Grey 31.3%

2,635

White 25.5%

2,142

Black 23%

1,939

Blue 17.1%

1,435

Red 1.8%

148

Yellow 0.7%

Green 0.6%

Mileage Distribution

Most 2021 Audi A3 S Line 30 TFSI 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.

28,303

typical

21,636

low mileage

35,715

high mileage

Half of all 2021 Audi A3 S Line 30 TFSI vehicles fall between 21,636 and 35,715 miles.

Is the mileage you're seeing normal?

✓ Under 21,636 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.

✓ 21,636–35,715 miles — normal for age. This is where most 2021 Audi A3 S Line 30 TFSIs sit.

⚠ Over 48,215 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 A3 S Line 30 TFSI — Still on the Road

Almost all 2021 Audi A3 S Line 30 TFSIs are still on the road.

Strong survival — 1,200 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

1.8

Avg advisories per vehicle

Other model years — Audi A3 S Line 30 TFSI: All A3 S Line 30 TFSI years → Which year to buy? →

2020 2022 2023 2024 2025

Or browse all models: Audi →

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See how the 2021 Audi A3 S Line 30 TFSI stacks up against a rival.

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