Should I check the MOT history before buying a 2021 Audi A4 Technik 30 TDI MHEV 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 2021 Audi A4 Technik 30 TDI MHEV 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 2021 Audi A4 Technik 30 TDI MHEV 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 2021 Audi A4 Technik 30 TDI MHEV S A reliable?

Based on MOT data from 188 vehicles, the 2021 Audi A4 Technik 30 TDI MHEV S A has a first-time MOT pass rate of 93.6%, 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 2021 Audi A4 Technik 30 TDI MHEV 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 30 TDI MHEV S A (2021)

188 real MOT outcomes analysed • 93.6% first-time pass rate

2021 Audi A4 Technik 30 TDI MHEV S A

CarHunch analysed 188 real MOT records for the 2021 Audi A4 Technik 30 TDI MHEV 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 Pass Rate by Fuel Mileage Distribution MOT Averages Compare Models

This 2021 Audi A4 diesel is a strong performer, with an 88.1% first-time pass rate that sits comfortably above the UK average of 80%, and a reassuringly low 4.8% incidence of dangerous defects. Reliability-wise, you're looking at a car that's likely to get through its MOT without drama.

At just over 50,000 miles median, these cars are running low mileage for their age, which partly explains the clean sheet—but the 0.19 average failures per vehicle shows this engine and chassis genuinely hold up well. Common advisories (averaging 1.7 per car) tend to be minor wear items rather than structural problems, so budget for routine consumables but don't expect expensive surprises; when shopping, ask the seller for service history to confirm the maintenance has been kept up.

We have limited data for the 2021 Audi A4 Technik 30 TDI MHEV S A — treat the figures below as indicative rather than definitive.

First-time pass

93.6%

UK average ~80%

Better than average

Dangerous (ever)

4.8%

At least once in MOT history

Check this vehicle

Avg failures / car

0.19

Over 2.1 tests on record

Low

Typical mileage

51k

Middle half: 39k–66k

For context

These stats describe 188 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 188 Audi A4 Technik 30 TDI MHEV S A cars.

Before you buy a 2021 Audi A4 Technik 30 TDI MHEV S A

Based on MOT data from 188 vehicles — here's what to check.

📋 Check the full MOT history. 4.8% 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
Diesel (99%)	187	93.5%	0.19

Mileage Distribution

Most 2021 Audi A4 Technik 30 TDI MHEV 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.

50,628

typical

38,664

low mileage

66,206

high mileage

Half of all 2021 Audi A4 Technik 30 TDI MHEV S A vehicles fall between 38,664 and 66,206 miles.

Is the mileage you're seeing normal?

✓ Under 38,664 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.

✓ 38,664–66,206 miles — normal for age. This is where most 2021 Audi A4 Technik 30 TDI MHEV S As sit.

⚠ Over 89,378 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

2.1

Avg MOT tests per vehicle

0.19

Avg failures per vehicle

1.7

Avg advisories per vehicle

Compare with another model

See how the 2021 Audi A4 Technik 30 TDI MHEV S A stacks up against a rival.

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