Should I check the MOT history before buying a 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto?

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 Mercedes Benz Amg A 45 S 4matic+ Plus Auto?

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 Mercedes Benz Amg A 45 S 4matic+ Plus Auto?

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 Mercedes Benz Amg A 45 S 4matic+ Plus Auto reliable?

Based on MOT data from 244 vehicles, the 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto has a first-time MOT pass rate of 91.9%, 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 Mercedes Benz Amg A 45 S 4matic+ Plus Auto?

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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Mercedes Benz Amg A 45 S 4matic+ Plus Auto (2021)

244 real MOT outcomes analysed • 91.9% first-time pass rate

2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto

CarHunch analysed 244 real MOT records for the 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto. 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 Still on the Road MOT Averages Colour Breakdown Compare Models

This Mercedes-AMG A 45 S posts an 87% first-time pass rate—7 percentage points ahead of the UK average—which is a solid result for a performance hatchback at this age. The dangerous defect rate of 11.5% is well below the concern threshold, so safety issues aren't a red flag here.

These cars are running sensible mileage for their age (median 23,795 miles), and the low failure rate of 0.26 per vehicle suggests the powertrain and mechanicals are holding up well. Before buying, get a full inspection of the turbocharger and intercooler setup, as these are the expensive wear items on AMG performance units—even reliable cars need preventive attention on high-output engines.

We have limited data for the 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto — treat the figures below as indicative rather than definitive.

⚠️ 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

91.9%

UK average ~80%

Better than average

Dangerous (ever)

11.5%

At least once in MOT history

Check this vehicle

Avg failures / car

0.26

Over 2.3 tests on record

Low

Typical mileage

24k

Middle half: 16k–29k

For context

These stats describe 244 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 244 Mercedes Benz Amg A 45 S 4matic+ Plus Auto cars.

Before you buy a 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto

Based on MOT data from 244 vehicles — here's what to check.

📋 Check the full MOT history. 11.5% 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 (98%)	240	91.9%	0.26

Colour Breakdown

Based on 2,009 Mercedes Benz Amg A 45 S 4matic+ Plus Auto vehicles registered in the UK — across all years. From DVLA registration records.

Grey 35.6%

715

Black 31.4%

631

White 15.6%

313

Blue 6%

121

Red 5.5%

111

Yellow 3.5%

Silver 2.4%

Mileage Distribution

Most 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto 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.

23,795

typical

15,541

low mileage

29,336

high mileage

Half of all 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto vehicles fall between 15,541 and 29,336 miles.

Is the mileage you're seeing normal?

✓ Under 15,541 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.

✓ 15,541–29,336 miles — normal for age. This is where most 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Autos sit.

⚠ Over 39,603 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2021 Mercedes Benz Amg A 45 S 4matic+ Plus Auto — Still on the Road

Almost all 2021 Mercedes Benz Amg A 45 S 4matic+ Plus Autos are still on the road.

Strong survival — 222 vehicles still getting MOTs in 2025, 100% 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

2.3

Avg MOT tests per vehicle

0.26

Avg failures per vehicle

0.8

Avg advisories per vehicle

Other model years — Mercedes Benz Amg A 45 S 4matic+ Plus Auto: All Amg A 45 S 4matic+ Plus Auto years → Which year to buy? →

2020 2022 2023 2024 2025

Or browse all models: Mercedes Benz →

Compare with another model

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