Generations
GD — Second Generation
2000–2007
1.5 NA, 2.0 Turbo, 2.0 Diesel, 2.0 NA, 2.5 STi
GH — GH (2007-2012)
2007–2012
1.5 NA, 1.6 NA, 2.0 Turbo, 2.0 NA, 2.5 STi
GV — Fourth Generation
2012–2017
1.6 NA, 2.0 Turbo, 2.0 NA
VA — Fifth Generation
2017–2024
1.6 NA, 2.0 Turbo, 2.0 NA
Top issues to watch for
The most serious Subaru Impreza problems ranked by severity. We track 12 known issues — here are the ones you need to know about first.
Dangerous
Ringland failure (EJ)
The ringland is the thin section of aluminium between the piston ring grooves on EJ25 engines. Under high cylinder pressures, particularly in tuned or modified cars, this section can crack and break away, causing immediate loss of compression and cylinder damage. This is catastrophic engine failure requiring complete rebuild or replacement. The issue is most documented on turbocharged EJ25 engines and becomes more likely with modifications that increase boost pressure beyond factory settings.
What happens if ignoredComplete engine failure requiring rebuild or replacement. Repair costs typically exceed the vehicle's value on older models. A specialist engine rebuild costs £3,000-£5,000 minimum. The car should not be driven if ringland failure is suspected as further damage to the crankcase and oil system is likely.
Independent garage
£2,500–£4,000
Specialist
£3,000–£5,000
Main dealer
£4,000–£6,500
Parts only
£1,500–£3,000
Dangerous
Timing belt service
EJ engines use timing belts that must be replaced at 75,000 mile intervals or 5 years maximum. These are interference engines where belt failure causes immediate contact between pistons and valves, resulting in bent valves, damaged pistons, and potential cylinder head damage. The belt, tensioner, and idler pulleys must all be replaced together as component failure is typically without warning.
What happens if ignoredBelt failure destroys the engine requiring complete rebuild or replacement. Repair costs typically exceed the vehicle's value. This service is preventive maintenance that must be completed within the specified interval regardless of belt appearance. The car should not be driven if the belt is overdue for replacement.
Independent garage
£400–£600
Specialist
£500–£700
Main dealer
£700–£1,000
Parts only
£100–£200
Dangerous
Body structure corrosion
MOT data shows structural corrosion failures at 27.9x the fleet average on this model, indicating significant issues with body integrity. This typically affects sills, rear subframe mounting points, and suspension mounting areas where water can collect and accelerate corrosion. Structural corrosion is classified as dangerous because it can affect the vehicle's crashworthiness and structural integrity.
What happens if ignoredStructural corrosion affects crashworthiness and can lead to suspension mounting point failure. MOT failure is certain if corrosion compromises structural integrity. Welded repairs may be possible in early stages, but extensive corrosion often makes the car beyond economical repair.
Independent garage
£300–£2,000
Specialist
£500–£2,500
Main dealer
£800–£3,000
Parts only
£100–£500
Major
Head gasket failure
EJ series engines are notorious for head gasket failure due to the horizontally-opposed design creating uneven cylinder head loading and the use of composite gaskets that deteriorate over time. External leaks typically develop first, followed by internal failure allowing coolant into the combustion chambers. This is a well-documented weakness affecting virtually all EJ20 and EJ25 engines, with failure rates significantly higher than other manufacturers' engines of similar age and mileage.
What happens if ignoredIf left unrepaired, internal failure leads to cylinder bore damage and potential engine seizure. External leaks cause gradual coolant loss leading to overheating. Repair involves engine removal and complete head rebuild including machining. Total cost typically £1,200-£2,000 at specialists.
Independent garage
£800–£1,500
Specialist
£1,200–£2,000
Main dealer
£1,800–£2,800
Parts only
£200–£500
8 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 Subaru Impreza fails at a significantly higher rate than the average car.
Anti-roll bar links worn
Suspension · 40-60k miles
MOT failure rate: 143x the fleet average
Sample: 2,771 tests
Emissions failure
Exhaust & Emissions · 60-80k miles
MOT failure rate: 81x the fleet average
Sample: 13,286 tests
Airbag fault
Seatbelts & Airbags · 80-100k miles
MOT failure rate: 78x the fleet average
Sample: 6,294 tests
Brake on any wheel grabbing severely
Brakes · 40-60k miles
MOT failure rate: 50x the fleet average
Sample: 1,691 tests
Structural corrosion
Bodywork · 0-20k miles
MOT failure rate: 28x the fleet average
Sample: 720 tests
Exhaust system damage
Bodywork · 40-60k miles
MOT failure rate: 26x the fleet average
Sample: 5,930 tests
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Related
Subaru Impreza reliability FAQs
What are the most common problems with the Subaru Impreza?
The Subaru Impreza has 12 known issues across 3 severity levels. The most serious are: Ringland failure (EJ), Timing belt service, Body structure corrosion.
Is the Subaru Impreza reliable?
The Subaru Impreza has 3 dangerous and 6 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.
How much does it cost to fix Subaru Impreza problems?
Repair costs range widely. The most significant issue (Ringland failure (EJ)) costs £2,500–£4,000 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.
Which Subaru Impreza generation is most reliable?
The GH (2007–2012) 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.