Vauxhall Insignia (2018)

Estimated running costs and MOT pass rates from 22,193 MOT tests in 2024.

Annual Cost

£2,002

£167/month

MOT Pass Rate

88%

Good

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 18-32

1956cc Diesel

Solid Option

88% pass rate, £2,002/year to run. 6 points above average.

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Diesel1956cc8 years old22,193 tests65k miles avg

Annual Running Costs

Fuel (Diesel, 1956cc)

~48 mpg

£1,397

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

£350

Total per year£2,002

Per month£167/mo

Per week£39/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

88% MOT pass rate(Good)

0%All-model avg: 82%100%

Good reliability. Occasional issues but generally solid. That's 6 points above the average of 82% across all models in our data. It also outperforms the Vauxhall brand average of 84%.

88% of MOT tests on Vauxhall Insignias from 2018 ended in a pass in 2024, when they were about 6 years old. That's based on 22,193 tests across the UK, retests included. The average mileage recorded at those tests was 64,781 miles.

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How Does It Compare?

Rank among 2018 models401st of 607(bottom half)

Rank among Vauxhall models363rd of 870(top half)

vs average of all models+6%(82% avg)

vs 2018 models average-1%(89% avg)

vs Vauxhall average+4%(84% avg)

Mileage Analysis

64,781

Average miles

44,400

Expected for age

The average 2018 Vauxhall Insignia had 64,781 miles on the clock at its 2024 MOT, which is above the expected 44,400 miles for a 6-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.

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Vauxhall Insignia by Year

Year	Pass Rate	Tests	Avg Mileage
2021	84%	831	44,508 mi
2020	88%	2,460	43,298 mi
2019	88%	13,969	58,557 mi
2018	88%	22,193	64,781 mi
2017	85%	28,382	74,907 mi
2016	81%	40,683	87,026 mi
2015	80%	52,530	100,077 mi
2014	78%	47,126	110,129 mi
2013	79%	39,443	115,689 mi
2012	78%	37,494	119,018 mi
2011	77%	42,781	117,437 mi
2010	75%	26,420	117,904 mi
2009	74%	18,505	117,419 mi
2008	70%	203	98,026 mi

Similar Cars to Consider

Volkswagen Golf

2017 · 1598cc Diesel

£1,674/year

91%

+3%

Ford Focus

2019 · 1499cc Diesel

£1,824/year

89%

+1%

Mercedes A

2019 · 1461cc Diesel

£1,674/year

91%

+3%

Mercedes A-Class

2017 · 1461cc Diesel

£1,824/year

88%

same

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About the 2018 Vauxhall Insignia

The 2018 Vauxhall Insignia is a family car. Our records list a 1956cc diesel engine, though engines vary between versions. 22,193 MOT tests were recorded on this model in 2024, making it one of the most commonly tested models on UK roads. Among all models from 2018, the average MOT pass rate is 89%, and this model falls short of that benchmark.

With an average of 64,781 miles recorded at its 2024 MOT tests, Vauxhall Insignia owners cover more miles than the average driver.

2018 Vauxhall Insignia Fuel Costs

The 1956cc diesel engine offers a reasonable balance between performance and economy. Expect around 48 mpg in mixed driving, which works out to roughly £1,397 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.

What does it cost to own a 2018 Vauxhall Insignia?

Total estimated annual running cost is £2,002 (£167/month), broken down as £1,397 fuel, £200 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 88% pass rate. Keeping on top of servicing will help avoid surprises.

Vauxhall Insignia Reliability Trend

Newer Vauxhall Insignias pass their MOT more often than older ones, by 9 percentage points on average, which is mostly down to age and wear.

Buying a Used 2018 Vauxhall Insignia

At 8 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. With 22,193 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Watch out

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Watch out

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Suspension Wear

Medium risk

Shock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2018 Vauxhall Insignia stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Vauxhall Insignia(2018)	88%	£1,397	£200	Grp 18-32	£2,002
Volkswagen Golf(2017)	91%	£1,219	£200	Grp 12-25	£1,674-£328
Ford Focus(2019)	89%	£1,219	£200	Grp 12-25	£1,824-£178
Mercedes A(2019)	91%	£1,219	£200	Grp 12-25	£1,674-£328
Mercedes A-Class(2017)	88%	£1,219	£200	Grp 12-25	£1,824-£178

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2018 Vauxhall Insignia

Is the 2018 Vauxhall Insignia reliable?

Good reliability. Occasional issues but generally solid. 88% of MOT tests on 2018 Vauxhall Insignias ended in a pass, from 22,193 tests (DVSA MOT data for tests in 2024, retests included). That's 6 points above the average of 82% across all models in the same data.

How much does a 2018 Vauxhall Insignia cost to run?

Our estimate is £2,002 a year (£167 a month): £1,397 fuel, £200 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2018 Vauxhall Insignia?

88% of 22,193 MOT tests on the 2018 Vauxhall Insignia ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 401st of 607 models first registered in 2018 (bottom half).

Which year Vauxhall Insignia has the best MOT pass rate?

Of the years with at least 100 tests, the 2018 Vauxhall Insignia has the highest MOT pass rate at 88% and the 2008 the lowest at 70%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2018 Vauxhall Insignia?

The average mileage recorded at MOT tests on the 2018 Vauxhall Insignia is 64,781 miles, which is above the expected 44,400 miles for a 6-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.