Should I check the MOT history before buying a 2021 Harley Davidson Sportster S?

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 Harley Davidson Sportster S?

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 Harley Davidson Sportster S?

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 Harley Davidson Sportster S reliable?

Based on MOT data from 131 vehicles, the 2021 Harley Davidson Sportster S has a first-time MOT pass rate of 84%, 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 Harley Davidson Sportster S?

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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Harley Davidson Sportster S (2021)

131 real MOT outcomes analysed • 84% first-time pass rate

2021 Harley Davidson Sportster S

CarHunch analysed 131 real MOT records for the 2021 Harley Davidson Sportster S. 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 Mileage Distribution MOT Averages Compare Models

The 2021 Harley-Davidson Sportster S posts an 84% first-time pass rate, which sits comfortably above the UK average of 80%, and dangerous defects are rare at just 3%. This is a solid reliability picture for a motorcycle of this age and specification.

With a median mileage of only 2,524 miles, these are lightly used machines—well below what you'd expect for a three-year-old bike—which explains the low failure rate of 0.11 per vehicle and minimal advisories at 0.3. Before purchase, check the service history carefully to ensure the low mileage hasn't masked neglect, and have a pre-buy inspection focus on fuel system and electrics, which are the most common advisory items on this model.

We have limited data for the 2021 Harley Davidson Sportster S — treat the figures below as indicative rather than definitive.

First-time pass

84%

UK average ~80%

Around average

Dangerous (ever)

3.1%

At least once in MOT history

Check this vehicle

Avg failures / car

0.11

Over 1.5 tests on record

Low

Typical mileage

Middle half: 2k–5k

For context

These stats describe 131 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.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 131 Harley Davidson Sportster S cars.

Before you buy a 2021 Harley Davidson Sportster S

Based on MOT data from 131 vehicles — here's what to check.

📋 Check the full MOT history. 3.1% 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 →

Mileage Distribution

Most 2021 Harley Davidson Sportster S 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.

2,524

typical

1,551

low mileage

4,614

high mileage

Half of all 2021 Harley Davidson Sportster S vehicles fall between 1,551 and 4,614 miles.

Is the mileage you're seeing normal?

✓ Under 1,551 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.

✓ 1,551–4,614 miles — normal for age. This is where most 2021 Harley Davidson Sportster Ss sit.

⚠ Over 6,228 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

1.5

Avg MOT tests per vehicle

0.11

Avg failures per vehicle

0.3

Avg advisories per vehicle

Other model years — Harley Davidson Sportster S: All Sportster S years → Which year to buy? →

2022

Or browse all models: Harley Davidson →

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See how the 2021 Harley Davidson Sportster S stacks up against a rival.

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