Should I check the MOT history before buying a 2020 Audi A3 S Line 30 TDI?

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 2020 Audi A3 S Line 30 TDI?

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 2020 Audi A3 S Line 30 TDI?

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.

Do I need an HPI check when buying a 2020 Audi A3 S Line 30 TDI?

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 TDI (2020)

147 real MOT outcomes analysed • 90.4% first-time pass rate

2020 Audi A3 S Line 30 TDI

CarHunch analysed 147 real MOT records for the 2020 Audi A3 S Line 30 TDI. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

Generally reliable 10.4% above UK average

90.4%

pass MOT first time

UK average: ~80%

40,789

typical mileage

29,810–55,255 middle half

9.5%

ever had a dangerous defect

recorded at any MOT

0.3

avg MOT failures per car

over 2.8 tests on record

What to check before buying a 2020 Audi A3 S Line 30 TDI

Practical pre-purchase checks for this age and model.

📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.

Before you buy a Audi A3 S Line 30 TDI

MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.

Inspection

Have a qualified mechanic check this car before you commit to buying →

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Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Diesel (99%)	146	90.4%	0.3
Other (1%)	1	100%	0

Mileage Distribution

Most 2020 Audi A3 S Line 30 TDI vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.

29,810

low mileage

40,789

typical

55,255

high mileage

Half of all 2020 Audi A3 S Line 30 TDI vehicles fall between 29,810 and 55,255 miles.

2020 Audi A3 S Line 30 TDI — Still on the Road

Strong survival — 117 vehicles still getting MOTs in 2025, 89% 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

2.8

Avg MOT tests per vehicle

0.3

Avg failures per vehicle

2.4

Avg advisories per vehicle

Found a specific Audi A3 S Line 30 TDI?

Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.

Other model years — Audi A3 S Line 30 TDI:

2021