Should I check the MOT history before buying a 2021 BMW 520d SE MHEV 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 BMW 520d SE MHEV 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 BMW 520d SE MHEV 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 BMW 520d SE MHEV Auto reliable?

Based on MOT data from 122 vehicles, the 2021 BMW 520d SE MHEV Auto has a first-time MOT pass rate of 94.3%, 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 BMW 520d SE MHEV 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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BMW 520d SE MHEV Auto (2021)

122 real MOT outcomes analysed • 94.3% first-time pass rate

2021 BMW 520d SE MHEV Auto

CarHunch analysed 122 real MOT records for the 2021 BMW 520d SE MHEV 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 MOT Averages Compare Models

The 2021 BMW 520D SE MHEV is more reliable than the UK average, with an 87.4% first-time MOT pass rate against the national 80%, and dangerous defects are rare at just 3.3% of vehicles. This diesel hybrid delivers solid build quality without the safety concerns that would worry a potential buyer.

These cars are averaging 51,055 miles by test time—reasonable for their age—and rarely fail their MOT outright, with only 0.16 failures per vehicle across the cohort. When issues do arise, they tend to be minor advisories rather than serious faults, so budget for routine maintenance rather than major repairs; however, have the hybrid system and diesel engine block inspected by a specialist before purchase to confirm the powertrain is in good condition.

We have limited data for the 2021 BMW 520d SE MHEV Auto — treat the figures below as indicative rather than definitive.

First-time pass

94.3%

UK average ~80%

Better than average

Dangerous (ever)

3.3%

At least once in MOT history

Check this vehicle

Avg failures / car

0.16

Over 2.2 tests on record

Low

Typical mileage

39k

Middle half: 27k–58k

For context

These stats describe 122 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 122 BMW 520d SE MHEV Auto cars.

Before you buy a 2021 BMW 520d SE MHEV Auto

Based on MOT data from 122 vehicles — here's what to check.

📋 Check the full MOT history. 3.3% 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
Electric Diesel (95%)	116	94%	0.16

Mileage Distribution

Most 2021 BMW 520d SE MHEV 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.

38,911

typical

26,559

low mileage

57,523

high mileage

Half of all 2021 BMW 520d SE MHEV Auto vehicles fall between 26,559 and 57,523 miles.

Is the mileage you're seeing normal?

✓ Under 26,559 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.

✓ 26,559–57,523 miles — normal for age. This is where most 2021 BMW 520d SE MHEV Autos sit.

⚠ Over 77,656 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

2.2

Avg MOT tests per vehicle

0.16

Avg failures per vehicle

1.5

Avg advisories per vehicle

Other model years — BMW 520d SE MHEV Auto: All 520d SE MHEV Auto years → Which year to buy? →

2020

Or browse all models: BMW →

Compare with another model

See how the 2021 BMW 520d SE MHEV Auto stacks up against a rival.

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