Should I check the MOT history before buying a 2020 BMW 520i M Sport 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 2020 BMW 520i M Sport 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 2020 BMW 520i M Sport 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 2020 BMW 520i M Sport MHEV Auto reliable?

Based on MOT data from 110 vehicles, the 2020 BMW 520i M Sport MHEV Auto has a first-time MOT pass rate of 92.6%, 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 2020 BMW 520i M Sport 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 520i M Sport MHEV Auto (2020)

110 real MOT outcomes analysed • 92.6% first-time pass rate

2020 BMW 520i M Sport MHEV Auto

CarHunch analysed 110 real MOT records for the 2020 BMW 520i M Sport 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 Still on the Road MOT Averages Compare Models

This 2020 BMW 520i M Sport hybrid is slightly more reliable than the UK average, with an 86.7% first-time pass rate against the 80% benchmark—a solid performer overall. However, nearly one in five of these cars (18.2%) have recorded a dangerous defect at some point, which is a material concern for a used buyer and worth investigating thoroughly on any example you're considering.

At just over 30,600 miles median, these are relatively low-mileage examples for their age, suggesting they've been well-looked-after so far. The average of 0.29 failures per test is reassuring, though the 1.6 advisories per vehicle hints at minor wear items accumulating, so budget for some maintenance as these cars age beyond their current sweet spot.

We have limited data for the 2020 BMW 520i M Sport MHEV Auto — treat the figures below as indicative rather than definitive.

⚠️ Around 1 in 8 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

92.6%

UK average ~80%

Better than average

Dangerous (ever)

18.2%

At least once in MOT history

Check this vehicle

Avg failures / car

0.29

Over 3.1 tests on record

Low

Typical mileage

31k

Middle half: 23k–39k

For context

These stats describe 110 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.

Average reliability — agree?

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 110 BMW 520i M Sport MHEV Auto cars.

Before you buy a 2020 BMW 520i M Sport MHEV Auto

Based on MOT data from 110 vehicles — here's what to check.

📋 Check the full MOT history. 18.2% 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
Hybrid Electric (Clean) (99%)	109	92.5%	0.29

Mileage Distribution

Most 2020 BMW 520i M Sport 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.

30,623

typical

22,576

low mileage

38,747

high mileage

Half of all 2020 BMW 520i M Sport MHEV Auto vehicles fall between 22,576 and 38,747 miles.

Is the mileage you're seeing normal?

✓ Under 22,576 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.

✓ 22,576–38,747 miles — normal for age. This is where most 2020 BMW 520i M Sport MHEV Autos sit.

⚠ Over 52,308 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2020 BMW 520i M Sport MHEV Auto — Still on the Road

Almost all 2020 BMW 520i M Sport MHEV Autos are still on the road.

Strong survival — 99 vehicles still getting MOTs in 2025, 98% 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

3.1

Avg MOT tests per vehicle

0.29

Avg failures per vehicle

1.6

Avg advisories per vehicle

Other model years — BMW 520i M Sport MHEV Auto: All 520i M Sport MHEV Auto years → Which year to buy? →

2021 2022 2023

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Average reliability — agree?