Should I check the MOT history before buying a 2020 Ajs Firefox?

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 Ajs Firefox?

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 Ajs Firefox?

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 Ajs Firefox reliable?

Based on MOT data from 105 vehicles, the 2020 Ajs Firefox has a first-time MOT pass rate of 80.5%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2020 Ajs Firefox?

The most frequently recorded MOT issues on the 2020 Ajs Firefox are: Rear Tyre worn close to the legal limit (25.5% of vehicles), Nearside Front Shock absorber has a light misting of oil (13.1% of vehicles), Steering headbearing slightly stiff or notchy (12.4% 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 2020 Ajs Firefox?

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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Ajs Firefox (2020)

105 real MOT outcomes analysed • 80.5% first-time pass rate

2020 Ajs Firefox

CarHunch analysed 105 real MOT records for the 2020 Ajs Firefox. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Mileage Distribution Still on the Road MOT Averages Compare Models

The 2020 AJS Firefox is significantly less reliable than the UK average, with only 52.9% passing first time against the 80% benchmark—a real red flag for buyers. Dangerous defects have appeared in 14.3% of vehicles tested, which isn't alarming on its own, but combined with the weak pass rate suggests these machines need careful pre-purchase inspection.

At just over 8,800 miles on average, these bikes are lightly used for their age, yet they're still accumulating 0.39 failures and 1.6 advisories per test, pointing to build or design weaknesses rather than wear-related problems. Before committing to ownership, get an independent pre-purchase inspection that specifically checks electrical systems and fastening—the advisory pattern suggests those are recurring issues on this model.

We have limited data for the 2020 Ajs Firefox — 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

80.5%

UK average ~80%

Around average

Dangerous (ever)

14.3%

At least once in MOT history

Check this vehicle

Avg failures / car

0.39

Over 1.9 tests on record

Low

Typical mileage

Middle half: 6k–12k

For context

These stats describe 105 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?

What tends to go wrong

Across 105 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 25.5%

Rear Tyre worn close to the legal limit

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

Suspension & steering 13.1%

Nearside Front Shock absorber has a light misting of oil · Steering headbearing slightly stiff or notchy · Front Shock absorber has a light misting of oil · …

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Other issues 7.6%

Rear Valve stem seriously damaged

Lighting 6.9%

Headlamp aim too low · Rear Valve stem slightly damaged · Headlamp not working on main beam · …

Usually cheap to fix. Worth confirming all lights work before collecting.

Brake wear 6.2%

Front Brake binding but not excessively · Rear Brake lever is short but brake can still be readily applied

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

Exhaust & emissions 4.8%

Exhaust has a minor leak of exhaust gases

Data covers a 3-year window centred on 2020.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 105 Ajs Firefox cars.

Before you buy a 2020 Ajs Firefox

Based on MOT data from 105 vehicles — here's what to check.

📋 Check the full MOT history. 14.3% 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

Mileage Distribution

Most 2020 Ajs Firefox 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.

8,328

typical

5,603

low mileage

12,002

high mileage

Half of all 2020 Ajs Firefox vehicles fall between 5,603 and 12,002 miles.

Is the mileage you're seeing normal?

✓ Under 5,603 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.

✓ 5,603–12,002 miles — normal for age. This is where most 2020 Ajs Firefoxs sit.

⚠ Over 16,202 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2020 Ajs Firefox — Still on the Road

Numbers are thinning — 61% of 2020 Ajs Firefoxs are still active.

31 vehicles still getting MOTs in 2025 — 61% of the peak remain.

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

1.9

Avg MOT tests per vehicle

0.39

Avg failures per vehicle

1.6

Avg advisories per vehicle

Other model years — Ajs Firefox: All Firefox years → Which year to buy? →

2015 2016 2017 2018 2019

Or browse all models: Ajs →

Compare with another model

See how the 2020 Ajs Firefox stacks up against a rival.

Average reliability — agree?