Generations
Mk1 — First Generation
2008–2017
1.6 Turbo, 1.8 VVT, 2.0 CDTI, 2.0 Turbo, 2.8 V6 Turbo
VXR — VXR Performance
2009–2017
2.8 V6 Turbo
A — Second Generation
2017–2024
1.5 Turbo, 1.5 Diesel, 1.6 CDTI, 2.0 CDTI
Top issues to watch for
The most serious Vauxhall Insignia problems ranked by severity. We track 13 known issues — here are the ones you need to know about first.
Dangerous
Fuel system leakage (diesel variants)
MOT data reveals diesel Insignias suffer from fuel system leakage at rates 27x higher than the fleet average, classified as a dangerous defect due to fire risk. This affects both generations and multiple diesel engines, suggesting systemic issues with fuel line connections, high-pressure fuel pump seals, or injector sealing. Modern diesel fuel systems operate at extremely high pressures (over 2000 bar), making even small leaks potentially dangerous. The issue appears to worsen with age across all mileage bands.
What happens if ignoredFuel system leakage presents an immediate fire hazard and must be addressed before driving. High-pressure diesel fuel can ignite from contact with hot engine components. Any visible fuel leakage requires immediate professional attention. The car should not be driven until the leak is identified and repaired.
Independent garage
£200–£600
Specialist
£250–£800
Main dealer
£300–£1,000
Parts only
£50–£300
Major
EGR valve failure (Mk1 2.0 CDTI)
The exhaust gas recirculation (EGR) valve recirculates exhaust gases back into the combustion chamber to reduce NOx emissions. Carbon buildup from diesel combustion gradually blocks the valve and its associated pipework, preventing proper operation. This causes loss of power, rough idling, and can trigger engine management warnings. The issue is exacerbated by short journey patterns that prevent the EGR system reaching optimal operating temperature.
What happens if ignoredA blocked EGR valve reduces engine performance and can cause the engine management light to illuminate, resulting in MOT failure. If left unaddressed, carbon buildup can spread to other engine components including the intake manifold, requiring more extensive cleaning or replacement.
Independent garage
£200–£400
Specialist
£300–£600
Main dealer
£400–£800
Parts only
£100–£250
Major
Timing chain wear (VXR 2.8 V6 Turbo)
The A28NET V6 turbo engine uses a timing chain system with hydraulic tensioners that can lose effectiveness over time, allowing chain slack to develop. This is accelerated by extended oil change intervals and the high stresses from turbocharging. Chain stretch affects valve timing precision, reducing performance and potentially causing valve-to-piston contact if the chain jumps teeth. This engine is particularly sensitive to oil quality and change frequency.
What happens if ignoredSevere chain stretch can cause the chain to jump timing, resulting in valve-to-piston contact and major engine damage requiring rebuild. Even moderate chain wear affects performance and fuel economy. Chain replacement requires substantial engine disassembly.
Independent garage
£800–£1,400
Specialist
£1,000–£2,000
Main dealer
£1,500–£2,500
Parts only
£400–£800
Major
Timing chain issues (A generation turbo engines)
Second generation Insignia turbo engines continue to suffer from timing chain stretch, particularly the A20NFT/A20NHT 2.0 turbo units. The hydraulic chain tensioners lose effectiveness over extended service, allowing chain slack that affects valve timing. This issue appears to be worse on engines with extended oil change intervals or where lower specification oil has been used. Chain wear is progressive and can eventually lead to engine damage if the chain jumps teeth.
What happens if ignoredSevere timing chain stretch can cause the chain to jump teeth, resulting in valve-to-piston contact and catastrophic engine damage requiring rebuild or replacement. Even moderate stretch reduces engine performance and fuel economy. Chain replacement involves significant engine disassembly and labour costs.
Independent garage
£600–£1,200
Specialist
£800–£2,000
Main dealer
£1,200–£2,500
Parts only
£300–£600
9 more known issues tracked
Including wear items, electrical niggles, and generation-specific problems.
MOT failure hotspots
Based on DVSA MOT test data. These are the items where the Vauxhall Insignia fails at a significantly higher rate than the average car.
Emissions failure
Exhaust & Emissions · 20-40k miles
MOT failure rate: 144x the fleet average
Sample: 381 tests
Suspension component fractured or
Suspension · 40-60k miles
MOT failure rate: 113x the fleet average
Sample: 6,892 tests
Power steering fault
Steering · 20-40k miles
MOT failure rate: 34x the fleet average
Sample: 7,297 tests
Fuel system leaking or a risk of fire
Bodywork · 20-40k miles
MOT failure rate: 26x the fleet average
Sample: 67,772 tests
Coil springs broken
Brakes · 0-20k miles
MOT failure rate: 26x the fleet average
Sample: 5,007 tests
Any part of the noise suppression system insecure
Exhaust & Emissions · 0-20k miles
MOT failure rate: 24x the fleet average
Sample: 5,328 tests
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Related
- Vauxhall Insignia buyer's guide
- Vauxhall Insignia service history check
- Vauxhall Insignia service schedule & costs
- Vauxhall Insignia MOT failure rates
- Vauxhall Insignia price guide
- How to check Vauxhall service history
- Buying a car without service history
- Vauxhall Insignia car check £7.49
- Free car faults check
- Free MOT failure rate check
- Free car check
Vauxhall Insignia reliability FAQs
What are the most common problems with the Vauxhall Insignia?
The Vauxhall Insignia has 13 known issues across 3 severity levels. The most serious are: Fuel system leakage (diesel variants).
Is the Vauxhall Insignia reliable?
The Vauxhall Insignia has 1 dangerous and 9 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.
How much does it cost to fix Vauxhall Insignia problems?
Repair costs range widely. The most significant issue (Fuel system leakage (diesel variants)) costs £200–£600 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.
Which Vauxhall Insignia generation is most reliable?
The VXR (2009–2017) has the fewest dangerous issues (0). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.