Vauxhall Insignia Sri Vx Line Nav T D (2018)
2018 Vauxhall Insignia Sri Vx Line Nav T D
CarHunch analysed 146 real MOT records for the 2018 Vauxhall Insignia Sri Vx Line Nav T D. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2018 Insignia diesel has a first-time MOT pass rate of 74.6%, which sits noticeably below the UK average of 80%—a meaningful gap that suggests moderate reliability concerns for this generation and spec. The good news is that dangerous defects are virtually absent (0%), and when failures do occur they're rare at just 0.17 per vehicle on average.
At 64,863 miles on average, these cars are running well within normal mileage for their age, which makes the below-average pass rate a more genuine reliability signal rather than a high-mileage issue. When you're viewing examples of this model, prioritise a full pre-purchase inspection focused on the common failure points that brought down the pass rate, and factor in a modest maintenance budget during your first year of ownership.
What to check before buying a 2018 Vauxhall Insignia Sri Vx Line Nav T D
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Vauxhall Insignia Sri Vx Line Nav T D
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (99%) | 144 | 74.3% | 0.17 |
| Gas Bi-Fuel (1%) | 1 | 100% | 0 |
| Diesel (1%) | 1 | 100% | 0 |
Mileage Distribution
Most 2018 Vauxhall Insignia Sri Vx Line Nav T D vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2018 Vauxhall Insignia Sri Vx Line Nav T D vehicles fall between 50,762 and 76,345 miles.
2018 Vauxhall Insignia Sri Vx Line Nav T D — Still on the Road
62 vehicles still getting MOTs in 2025 — 70% of the peak remain.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2022–2025.
MOT History Averages
Found a specific Vauxhall Insignia Sri Vx Line Nav T D?
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