Should I check the MOT history before buying a 2020 Audi A4 Technik 35 TDI S A?

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 A4 Technik 35 TDI S A?

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 A4 Technik 35 TDI S A?

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 2020 Audi A4 Technik 35 TDI S A reliable?

Based on MOT data from 718 vehicles, the 2020 Audi A4 Technik 35 TDI S A 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 2020 Audi A4 Technik 35 TDI S A?

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 Technik 35 TDI S A (2020)

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

2020 Audi A4 Technik 35 TDI S A

CarHunch analysed 718 real MOT records for the 2020 Audi A4 Technik 35 TDI S A. 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 Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

This 2020 A4 TDI is more reliable than the UK average, with an 86.2% first-time pass rate against the national 80% baseline—a solid result for a four-year-old diesel. The dangerous defect rate of 8.9% is comfortably low, so structural safety issues are not a widespread concern with this cohort.

At roughly 51,000 miles on average, these cars are running well within expected wear for their age, and the low failure rate of 0.29 per vehicle suggests the TDI engine and chassis are holding up. The 2.3 advisories per car indicate minor maintenance items rather than serious trouble, but you should still have a pre-purchase inspection focus on diesel particulate filter condition and any outstanding advisories, as these can become expensive.

The 2020 Audi A4 Technik 35 TDI S A 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.

⚠️ 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

92.6%

UK average ~80%

Better than average

Dangerous (ever)

8.9%

At least once in MOT history

Check this vehicle

Avg failures / car

0.29

Over 3 tests on record

Low

Typical mileage

47k

Middle half: 34k–63k

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 2.3 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 718 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 718 Audi A4 Technik 35 TDI S A cars.

Before you buy a 2020 Audi A4 Technik 35 TDI S A

Based on MOT data from 718 vehicles — here's what to check.

📋 Check the full MOT history. 8.9% 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

Colour Breakdown

Based on 883 Audi A4 Technik 35 TDI S A vehicles registered in the UK — across all years. From DVLA registration records.

Black 42.6%

376

White 18.6%

164

Grey 16.5%

146

Blue 11.7%

103

Silver 9.3%

Red 1.4%

Mileage Distribution

Most 2020 Audi A4 Technik 35 TDI S A 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.

46,775

typical

33,897

low mileage

62,962

high mileage

Half of all 2020 Audi A4 Technik 35 TDI S A vehicles fall between 33,897 and 62,962 miles.

Is the mileage you're seeing normal?

✓ Under 33,897 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.

✓ 33,897–62,962 miles — normal for age. This is where most 2020 Audi A4 Technik 35 TDI S As sit.

⚠ Over 84,998 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2020 Audi A4 Technik 35 TDI S A — Still on the Road

Almost all 2020 Audi A4 Technik 35 TDI S As are still on the road.

Strong survival — 568 vehicles still getting MOTs in 2025, 94% 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

Avg MOT tests per vehicle

0.29

Avg failures per vehicle

2.3

Avg advisories per vehicle

Other model years — Audi A4 Technik 35 TDI S A: All A4 Technik 35 TDI S A years → Which year to buy? →

2019

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