VAUXHALL INSIGNIA (2021)
Running costs, reliability data, and common problems from 831 real MOT tests.
Annual Cost
£1,505
£125/month
MOT Pass Rate
84%
Good
Road Tax
£195
Flat rate/year
Insurance
Grp 12-25
1496cc Diesel
Solid Option
84% pass rate, £1505/year to run. Close to the national average.
Check a specific VAUXHALL INSIGNIA
Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.
Annual Running Costs
~55 mpg
Flat rate (post-2017)
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
Get an insurance quote for this VAUXHALL INSIGNIA
Compare quotes and find the best deal
Reliability Verdict
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 5 years old, 84% of VAUXHALL INSIGNIAs from 2021 passed their MOT first time in 2026. That's based on 831 tests across the UK. The average mileage at this age is 44,508 miles.
Got a VAUXHALL INSIGNIA you're looking at?
Enter the reg plate to check its specific MOT history, mileage, and health score.
How Does It Compare?
Mileage Analysis
44,508
Average miles
37,000
Expected for age
The average 2021 VAUXHALL INSIGNIA has 44,508 miles on the clock, which is above the expected 37,000 miles for a 5-year-old car. Higher-mileage cars often have more motorway miles, which is generally less harmful than stop-start urban driving.
Looking at a specific VAUXHALL INSIGNIA?
Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.
Best Year to Buy?
The most reliable year is the 2018 model with a 88% MOT pass rate, while the 2008 model has the lowest at 70%. The 2021 sits between the two at 84%.
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
Check a Specific Vauxhall Insignia
Enter a reg plate to get the full MOT history, health score, and mileage verification.
Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.
About the 2021 VAUXHALL INSIGNIA
The 2021 VAUXHALL INSIGNIA is a small family car with a 1496cc diesel engine. 831 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It sits in the bottom 94% of 2021 cars for MOT pass rates.
With an average of 44,508 miles at 5 years old, VAUXHALL INSIGNIA owners cover more miles than the average driver.
2021 VAUXHALL INSIGNIA Fuel Costs
The 1496cc diesel engine offers a reasonable balance between performance and economy. Expect around 55 mpg in mixed driving, which works out to roughly £905 per year at current diesel prices of 148p per litre (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 2021 VAUXHALL INSIGNIA?
Total estimated annual running cost is £1,505 (£125/month), broken down as £905 fuel, £195 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 84% pass rate. Keeping on top of servicing will help avoid surprises.
VAUXHALL INSIGNIA Reliability Trend
Newer VAUXHALL INSIGNIAs show better MOT pass rates than older ones, with an average improvement of 9 percentage points.
Buying a Used 2021 VAUXHALL INSIGNIA
At 5 years old, the VAUXHALL INSIGNIA offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2018 model has the highest pass rate at 88%.
Common Issues to Watch For
Based on the 2021 VAUXHALL INSIGNIA's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Low riskExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Service History
Low riskAlways 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 2021 VAUXHALL INSIGNIA stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| VAUXHALL INSIGNIA(2021) | 84% | £905 | £195 | Grp 12-25 | £1505 |
| FORD FOCUS(2019) | 89% | £905 | £190 | Grp 12-25 | £1500-£5 |
| MERCEDES A(2019) | 91% | £905 | £190 | Grp 12-25 | £1350-£155 |
| VOLKSWAGEN POLO(2019) | 89% | £905 | £190 | Grp 12-25 | £1500-£5 |
| KIA SPORTAGE(2019) | 89% | £905 | £190 | Grp 12-25 | £1500-£5 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
Related Vauxhall Models
Explore other Vauxhall cars or similar models in the same category.
VAUXHALL CORSA
2015 · 1398cc Petrol
VAUXHALL ASTRA
2013 · 1700cc Diesel
VAUXHALL MOKKA
2015 · 1364cc Petrol
FORD FOCUS
2019 · 1499cc Diesel
MERCEDES A
2019 · 1461cc Diesel
VOLKSWAGEN POLO
2019 · 1598cc Diesel
Related Guides
In-depth articles relevant to the Vauxhall Insignia.
Petrol vs Diesel in 2026: Which Actually Costs Less to Own?
8 min read
Buying GuideCars That Lose Value Fastest: Models to Avoid for Depreciation
8 min read
Running CostsCheapest Cars to Run in 2026: Real Data from 19.8 Million MOT Tests
9 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Problems: 7 Issues Owners Report (2026)
13 min read
Check a specific VAUXHALL INSIGNIA
Enter the reg to see its MOT history, mileage check, and predicted costs.
Premium History Check
Buying a VAUXHALL INSIGNIA? Our premium check covers:
- Stolen check (PNC)
- Outstanding finance
- Write-off history (Cat A/B/N/S)
- Previous owners count
Competitors charge £10-£20 for the same data