Should I check the MOT history before buying a 2021 Audi A3 S Line 35 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 35 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 35 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 35 TFSI reliable?

Based on MOT data from 1,632 vehicles, the 2021 Audi A3 S Line 35 TFSI has a first-time MOT pass rate of 93.7%, 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 35 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.

CarHunch

Get Started

Audi A3 S Line 35 TFSI (2021)

1,632 real MOT outcomes analysed • 93.7% first-time pass rate

2021 Audi A3 S Line 35 TFSI

CarHunch analysed 1,632 real MOT records for the 2021 Audi A3 S Line 35 TFSI. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

On this page

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 A3 S Line 35 TFSI is a genuinely reliable proposition, with a first-time MOT pass rate of 93.2%—well above the UK average of 80%—and only 8.0% of vehicles ever flagged for dangerous defects, which is reassuringly low. This petrol model (which makes up the vast majority of the cohort) maintains consistent quality across the dataset.

At a median mileage of just 26,566 miles, these cars are still relatively fresh, so the 0.2 average failures per vehicle and 1.6 advisories tell you that wear-related issues aren't yet a concern for most owners. When you're evaluating a used example, focus on service history and look for one with mileage below 35,000 to stay ahead of any developing minor issues.

The 2021 Audi A3 S Line 35 TFSI passes its MOT first time more often than most UK vehicles (93.7% 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

93.7%

UK average ~80%

Better than average

Dangerous (ever)

At least once in MOT history

Check this vehicle

Avg failures / car

0.2

Over 2.3 tests on record

Low

Typical mileage

27k

Middle half: 20k–34k

For context

✅ Good baseline reliability. A 93.7% 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 1,632 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.

A solid choice — agree?

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 1,632 Audi A3 S Line 35 TFSI cars.

Before you buy a 2021 Audi A3 S Line 35 TFSI

Based on MOT data from 1,632 vehicles — here's what to check.

📋 Check the full MOT history. 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

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (97%)	1,586	93.5%	0.21

Colour Breakdown

Based on 9,767 Audi A3 S Line 35 TFSI vehicles registered in the UK — across all years. From DVLA registration records.

Grey 30.4%

2,971

Black 23.1%

2,258

White 22.2%

2,168

Blue 20%

1,958

Red 3.3%

319

Green 0.5%

Yellow 0.4%

Mileage Distribution

Most 2021 Audi A3 S Line 35 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.

26,566

typical

19,609

low mileage

34,345

high mileage

Half of all 2021 Audi A3 S Line 35 TFSI vehicles fall between 19,609 and 34,345 miles.

Is the mileage you're seeing normal?

✓ Under 19,609 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.

✓ 19,609–34,345 miles — normal for age. This is where most 2021 Audi A3 S Line 35 TFSIs sit.

⚠ Over 46,365 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

2.3

Avg MOT tests per vehicle

0.2

Avg failures per vehicle

1.6

Avg advisories per vehicle

Other model years — Audi A3 S Line 35 TFSI: All A3 S Line 35 TFSI years → Which year to buy? →

2020 2022 2023 2024 2025

Or browse all models: Audi →

Compare with another model

See how the 2021 Audi A3 S Line 35 TFSI stacks up against a rival.

A solid choice — agree?