Should I check the MOT history before buying a 2021 Mutt Fat Sabbath 125?

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 Mutt Fat Sabbath 125?

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 Mutt Fat Sabbath 125?

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 Mutt Fat Sabbath 125 reliable?

Based on MOT data from 192 vehicles, the 2021 Mutt Fat Sabbath 125 has a first-time MOT pass rate of 79.3%, 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 Mutt Fat Sabbath 125?

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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Mutt Fat Sabbath 125 (2021)

192 real MOT outcomes analysed • 79.3% first-time pass rate

2021 Mutt Fat Sabbath 125

CarHunch analysed 192 real MOT records for the 2021 Mutt Fat Sabbath 125. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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The 2021 MUTT FAT SABBATH 125 is a reliability concern: only 52.5% pass on the first attempt compared to the UK average of 80%, and nearly 1 in 20 vehicles (3.1%) have recorded dangerous defects. This suggests either quality control issues in the first model year or a design fault affecting multiple units worth investigating before purchase.

At an average mileage of 3,315 miles—reasonable for a three-year-old machine—vehicles are still averaging 0.34 failures and 0.7 advisories each, indicating emerging wear and maintenance gaps rather than catastrophic problems. Before buying, get a pre-purchase inspection to check suspension, brake lines, and electrical systems, as these are likely contributing to the poor pass rate.

We have limited data for the 2021 Mutt Fat Sabbath 125 — treat the figures below as indicative rather than definitive.

First-time pass

79.3%

UK average ~80%

Around average

Dangerous (ever)

3.1%

At least once in MOT history

Check this vehicle

Avg failures / car

0.34

Over 1.6 tests on record

Low

Typical mileage

Middle half: 1k–4k

For context

These stats describe 192 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 192 Mutt Fat Sabbath 125 cars.

Before you buy a 2021 Mutt Fat Sabbath 125

Based on MOT data from 192 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 Mutt Fat Sabbath 125 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.

2,661

typical

1,109

low mileage

4,484

high mileage

Half of all 2021 Mutt Fat Sabbath 125 vehicles fall between 1,109 and 4,484 miles.

Is the mileage you're seeing normal?

✓ Under 1,109 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.

✓ 1,109–4,484 miles — normal for age. This is where most 2021 Mutt Fat Sabbath 125s sit.

⚠ Over 6,053 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

1.6

Avg MOT tests per vehicle

0.34

Avg failures per vehicle

0.7

Avg advisories per vehicle

Other model years — Mutt Fat Sabbath 125: All Fat Sabbath 125 years → Which year to buy? →

2020 2022

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Average reliability — agree?