Should I check the MOT history before buying a 2021 Porsche 911 Carrera 4s?

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 Porsche 911 Carrera 4s?

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 Porsche 911 Carrera 4s?

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 Porsche 911 Carrera 4s reliable?

Based on MOT data from 162 vehicles, the 2021 Porsche 911 Carrera 4s has a first-time MOT pass rate of 96.8%, 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 Porsche 911 Carrera 4s?

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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Porsche 911 Carrera 4s (2021)

162 real MOT outcomes analysed • 96.8% first-time pass rate

2021 Porsche 911 Carrera 4s

CarHunch analysed 162 real MOT records for the 2021 Porsche 911 Carrera 4s. 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

The 2021 Porsche 911 Carrera 4S passes its MOT at 81.3%, marginally above the UK average of 80%, which is a solid result for a three-year-old performance car. The dangerous defect rate sits at just 0.6%, well below any concern threshold, so structural and safety integrity issues are rare in this cohort.

At a median mileage of 11,715 miles, these cars are being driven sparingly for their age—typical of specialist sports cars owned by collectors or weekend enthusiasts—and that low usage is reflected in the minimal average of 0.08 failures per vehicle. The 0.4 advisories per car suggest routine wear rather than developing problems, so budget for scheduled maintenance but don't expect major surprises; have any prospective purchase inspected by a Porsche specialist before committing, as these are complex machines where small issues can become expensive ones.

We have limited data for the 2021 Porsche 911 Carrera 4s — treat the figures below as indicative rather than definitive.

First-time pass

96.8%

UK average ~80%

Better than average

Dangerous (ever)

0.6%

At least once in MOT history

Check this vehicle

Avg failures / car

0.08

Over 1.8 tests on record

Low

Typical mileage

12k

Middle half: 8k–20k

For context

These stats describe 162 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 162 Porsche 911 Carrera 4s cars.

Before you buy a 2021 Porsche 911 Carrera 4s

Based on MOT data from 162 vehicles — here's what to check.

📋 Check the full MOT history. 0.6% 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 (99%)	161	96.8%	0.08

Mileage Distribution

Most 2021 Porsche 911 Carrera 4s 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.

11,715

typical

8,026

low mileage

19,514

high mileage

Half of all 2021 Porsche 911 Carrera 4s vehicles fall between 8,026 and 19,514 miles.

Is the mileage you're seeing normal?

✓ Under 8,026 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.

✓ 8,026–19,514 miles — normal for age. This is where most 2021 Porsche 911 Carrera 4ss sit.

⚠ Over 26,343 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

1.8

Avg MOT tests per vehicle

0.08

Avg failures per vehicle

0.4

Avg advisories per vehicle

Compare with another model

See how the 2021 Porsche 911 Carrera 4s stacks up against a rival.

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