Should I check the MOT history before buying a 2021 Mercedes Benz Cla?

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 Cla?

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 Cla?

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 Cla reliable?

Based on MOT data from 6,097 vehicles, the 2021 Mercedes Benz Cla has a first-time MOT pass rate of 91%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2021 Mercedes Benz Cla?

The most frequently recorded MOT issues on the 2021 Mercedes Benz Cla are: Offside Front Tyre worn close to legal limit/worn on edge (29.1% of vehicles), Nearside Front Tyre worn close to legal limit/worn on edge (27.6% of vehicles), Offside Rear Tyre slightly damaged/cracking or perishing (15.1% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 2021 Mercedes Benz Cla?

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 Cla (2021)

6,097 real MOT outcomes analysed • 91% first-time pass rate

2021 Mercedes Benz Cla

CarHunch analysed 6,097 real MOT records for the 2021 Mercedes Benz Cla. 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 Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution MOT Averages Colour Breakdown Compare Models

The 2021 Mercedes-Benz CLA is a genuinely reliable first-time MOT performer, passing at 91% versus the UK average of 80%—a significant 11-point advantage that suggests well-built cars reaching their test in solid condition. Only 11.4% have ever encountered a dangerous defect, which is reassuringly low and suggests structural and safety systems are holding up well.

At 30,500 miles median for a three-year-old car, these CLAs are running well within typical wear-and-tear territory, which helps explain the strong pass rate. The average of just 0.3 failures per vehicle and 1.9 advisories indicates minor wear items rather than systemic problems—so when you inspect one, focus on tyre condition and brake pad depth rather than sweating the engine or gearbox.

The 2021 Mercedes Benz Cla passes its MOT first time more often than most UK vehicles (91% 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

91%

UK average ~80%

Better than average

Dangerous (ever)

11.4%

At least once in MOT history

Check this vehicle

Avg failures / car

0.3

Over 2.4 tests on record

Low

Typical mileage

31k

Middle half: 22k–41k

For context

✅ Good baseline reliability. A 91% 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 1.9 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 6,097 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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What tends to go wrong

Across 6,097 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 29.1%

Offside Front Tyre worn close to legal limit/worn on edge · Nearside Front Tyre worn close to legal limit/worn on edge · Offside Rear Tyre slightly damaged/cracking or perishing · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Brake wear 14.2%

Front Brake pad(s) wearing thin · Rear Brake pad(s) wearing thin · Front Brake disc worn, pitted or scored, but not seriously weakened · …

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Other issues 5.7%

Nearside Rear Child Seat fitted not allowing full inspection of adult belt · Windscreen damaged but not adversely affecting driver's view

Data covers a 3-year window centred on 2021.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 6,097 Mercedes Benz Cla cars.

Before you buy a 2021 Mercedes Benz Cla

Based on MOT data from 6,097 vehicles — here's what to check.

📋 Check the full MOT history. 11.4% 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 (100%)	6,080	91%	0.3

Colour Breakdown

Based on 64,873 Mercedes Benz Cla vehicles registered in the UK — across all years. From DVLA registration records.

Black 29.6%

19,209

White 27.6%

17,907

Grey 22.2%

14,431

Silver 8%

5,174

Red 6.9%

4,447

Blue 4.5%

2,923

Purple 1.1%

692

Bronze 0.1%

Green 0%

Gold 0%

Brown 0%

Mileage Distribution

Most 2021 Mercedes Benz Cla 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.

30,504

typical

21,906

low mileage

40,977

high mileage

Half of all 2021 Mercedes Benz Cla vehicles fall between 21,906 and 40,977 miles.

Is the mileage you're seeing normal?

✓ Under 21,906 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.

✓ 21,906–40,977 miles — normal for age. This is where most 2021 Mercedes Benz Clas sit.

⚠ Over 55,318 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

2.4

Avg MOT tests per vehicle

0.3

Avg failures per vehicle

1.9

Avg advisories per vehicle

Other model years — Mercedes Benz Cla: All Cla years → Which year to buy? →

2013 2014 2015 2016 2017 2018 2019 2020 2022 2023

Or browse all models: Mercedes Benz →

Compare with another model

See how the 2021 Mercedes Benz Cla stacks up against a rival.

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