Should I check the MOT history before buying a 2018 Sinnis Harrier?

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 Sinnis Harrier?

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 Sinnis Harrier?

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 Sinnis Harrier reliable?

Based on MOT data from 111 vehicles, the 2018 Sinnis Harrier has a first-time MOT pass rate of 79.5%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2018 Sinnis Harrier?

The most frequently recorded MOT issues on the 2018 Sinnis Harrier are: Rear Tyre worn close to the legal limit (25.6% of vehicles), Nearside Front Shock absorber has a light misting of oil (17.4% of vehicles), Exhaust noisy (17.4% 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 Sinnis Harrier?

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.

CarHunch

Get Started

Sinnis Harrier (2018)

111 real MOT outcomes analysed • 79.5% first-time pass rate

2018 Sinnis Harrier

CarHunch analysed 111 real MOT records for the 2018 Sinnis Harrier. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
Which year to buy? →

On this page

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 Sinnis Harrier has a first-time MOT pass rate of just 46.6%, nearly 34 percentage points below the UK average of 80%, which signals serious reliability concerns for this model. With 13.5% of vehicles having suffered dangerous defects, buyers should be especially cautious about safety-critical systems like brakes and steering.

At an average mileage of 6,777 km this is extremely low for a six-year-old vehicle, suggesting most examples have seen minimal use—yet they're still failing MOTs at double the normal rate, which points to age-related deterioration rather than wear-and-tear issues. Before buying, have a pre-purchase inspection focus on fluid leaks, corrosion, and battery condition, as the high advisory rate of 1.6 per vehicle indicates accumulated minor defects that compound quickly on lightly-used machines.

We have limited data for the 2018 Sinnis Harrier — 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

79.5%

UK average ~80%

Around average

Dangerous (ever)

13.5%

At least once in MOT history

Check this vehicle

Avg failures / car

0.41

Over 2.1 tests on record

Low

Typical mileage

Middle half: 3k–8k

For context

These stats describe 111 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 111 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 25.6%

Rear Tyre worn close to the legal limit · Rear Tyre tread depth is below minimum requirements of 1.0mm

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

Suspension & steering 17.4%

Nearside Front Shock absorber has a light misting of oil · Steering headbearing has slight free play · Nearside Front Shock absorber has a serious fluid leak · …

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

Exhaust & emissions 17.4%

Exhaust noisy

Brake wear 15.1%

Roller brake test The less effective brake control does not achieve an efficiency of 25% · Front Brake pad(s) close to minimum limit · 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.

Lighting 7%

Rear Wheel has a slightly distorted bead rim

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

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 111 Sinnis Harrier cars.

Before you buy a 2018 Sinnis Harrier

Based on MOT data from 111 vehicles — here's what to check.

📋 Check the full MOT history. 13.5% 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%)	110	79.3%	0.41

Mileage Distribution

Most 2018 Sinnis Harrier 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.

5,904

typical

3,323

low mileage

7,802

high mileage

Half of all 2018 Sinnis Harrier vehicles fall between 3,323 and 7,802 miles.

Is the mileage you're seeing normal?

✓ Under 3,323 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.

✓ 3,323–7,802 miles — normal for age. This is where most 2018 Sinnis Harriers sit.

⚠ Over 10,532 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2018 Sinnis Harrier — Still on the Road

Numbers are thinning — 31% of 2018 Sinnis Harriers are still active.

Numbers are declining — 15 vehicles still getting MOTs in 2025 (31% 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

2.1

Avg MOT tests per vehicle

0.41

Avg failures per vehicle

1.6

Avg advisories per vehicle

Compare with another model

See how the 2018 Sinnis Harrier stacks up against a rival.

Average reliability — agree?