Should I check the MOT history before buying a 2018 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 2018 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 2018 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 2018 Ajs Firefox reliable?

Based on MOT data from 147 vehicles, the 2018 Ajs Firefox has a first-time MOT pass rate of 78.8%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 Ajs Firefox?

The most frequently recorded MOT issues on the 2018 Ajs Firefox are: COVID-19 6 MONTH EXTENSION (18.6% of vehicles), Nearside Front Shock absorber has a light misting of oil (18.2% of vehicles), Offside Front Shock absorber has a light misting of oil (16.4% 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 2018 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 (2018)

147 real MOT outcomes analysed • 78.8% first-time pass rate

2018 Ajs Firefox

CarHunch analysed 147 real MOT records for the 2018 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 Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Compare Models

The 2018 AJS Firefox has a first-time MOT pass rate of just 55.2%, well below the UK average of 80%, which is a significant red flag for reliability. Nearly 11% of these bikes have recorded dangerous defects during their MOT history, suggesting you should budget for safety-critical repairs if buying used.

At a median mileage of 6,471 miles for a six-year-old motorcycle, these are relatively low-use machines, yet they're still failing MOTs at nearly double the national rate—pointing to design or build quality issues rather than wear. With an average of 1.7 advisories per vehicle, minor issues are common, so get a pre-purchase inspection that specifically covers the mechanical systems flagged in MOT records.

We have limited data for the 2018 Ajs Firefox — treat the figures below as indicative rather than definitive.

⚠️ About 1 in 12 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

78.8%

UK average ~80%

Around average

Dangerous (ever)

10.9%

At least once in MOT history

Check this vehicle

Avg failures / car

0.63

Over 2.6 tests on record

Moderate

Typical mileage

Middle half: 4k–10k

For context

These stats describe 147 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 147 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Other issues 18.6%

COVID-19 6 MONTH EXTENSION · Horn not working

Suspension & steering 18.2%

Nearside Front Shock absorber has a light misting of oil · Offside Front Shock absorber has a light misting of oil · 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.

Tyre wear 14.5%

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.

Lighting 14.1%

Headlamp not working on dipped beam

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

Brake wear 12.3%

Roller brake test The less effective brake control does not achieve an efficiency of 25% · Rear Brake indicates slight fluctuation of brake effort

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

Exhaust & emissions 7.7%

Exhaust noisy · Exhaust has a minor leak of exhaust gases

Data covers a 3-year window centred on 2018.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 147 Ajs Firefox cars.

Before you buy a 2018 Ajs Firefox

Based on MOT data from 147 vehicles — here's what to check.

📋 Check the full MOT history. 10.9% 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
Petrol (99%)	146	78.9%	0.62

Mileage Distribution

Most 2018 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.

6,471

typical

3,621

low mileage

9,934

high mileage

Half of all 2018 Ajs Firefox vehicles fall between 3,621 and 9,934 miles.

Is the mileage you're seeing normal?

✓ Under 3,621 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.

✓ 3,621–9,934 miles — normal for age. This is where most 2018 Ajs Firefoxs sit.

⚠ Over 13,410 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 Ajs Firefox — Still on the Road

Numbers are thinning — 43% of 2018 Ajs Firefoxs are still active.

Numbers are declining — 30 vehicles still getting MOTs in 2025 (43% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.

MOT History Averages

2.6

Avg MOT tests per vehicle

0.63

Avg failures per vehicle

1.7

Avg advisories per vehicle

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

2015 2016 2017 2019 2020

Or browse all models: Ajs →

Compare with another model

See how the 2018 Ajs Firefox stacks up against a rival.

Average reliability — agree?