Generations
GR — GR (2008-2014)
2008–2014
2.5L Turbo
VA — Fourth Generation
2014–2019
2.5L Turbo
Top issues to watch for
The most serious Subaru Wrx problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Dangerous
Ringland failure (GR/GV)
The ringland is the area of piston between the top compression ring and the oil control ring on EJ25 turbocharged engines. Under detonation or pre-ignition conditions, this thin section of aluminium can crack and break away, destroying compression in that cylinder. This is the most documented catastrophic failure mode on GR/GV WRX models, typically triggered by poor fuel quality, aggressive tuning, or carbon knock from incorrect spark plug heat range. The FA20 engine in VA models uses a different piston design that is not subject to this specific failure mode.
What happens if ignoredComplete engine failure requiring full rebuild or replacement. Broken ringland pieces can damage other cylinders, score cylinder walls, and contaminate the oil system. Typical engine rebuild costs £4,000-£8,000 depending on extent of damage. The car should not be driven with suspected ringland failure as further damage is inevitable.
Specialist
£4,000–£8,000
Main dealer
£6,000–£12,000
Parts only
£2,000–£5,000
Dangerous
Clutch pedal and bracket failure
US NHTSA complaints document multiple cases where the clutch and brake pedal brackets affixed to the firewall break loose, causing the brake pedal to shift towards the clutch position. This creates a dangerous situation where the brake pedal cannot be fully depressed or may be confused with the clutch pedal. The bracket failure appears to be caused by metal fatigue in the firewall mounting points, exacerbated by the additional stress from performance driving and frequent clutch operation.
What happens if ignoredCritical safety risk where brake pedal dysfunction could prevent emergency stopping. If the bracket fails completely, the brake pedal may become inoperable or its position may be confused with the clutch, leading to potential accidents. Repair involves firewall reinforcement and bracket replacement, typically costing £300-£600. The vehicle should not be driven if pedal bracket failure is suspected.
Independent garage
£300–£500
Specialist
£400–£600
Main dealer
£500–£800
Parts only
£100–£200
Major
Turbo failure (GR/GV)
The IHI VF48 and VF52 turbochargers fitted to GR/GV WRX models develop bearing wear and shaft play over time, particularly when subjected to aggressive driving or poor oil change intervals. The turbocharger's centre cartridge contains journal bearings that rely entirely on engine oil for lubrication and cooling. When these bearings wear, the turbine shaft develops lateral movement that damages the compressor and turbine wheels, leading to loss of boost pressure and eventual complete failure. This is less of an issue on VA models due to improved oil feed design.
What happens if ignoredProgressive loss of power and boost pressure leading to poor performance and potential engine damage from oil starvation if seals fail completely. Failed turbo can send metal debris into the intercooler and intake system. Replacement turbocharger costs £800-£1,500 plus labour. The car remains driveable with reduced performance until complete failure occurs.
Independent garage
£1,200–£2,000
Specialist
£1,400–£2,200
Main dealer
£1,800–£2,800
Parts only
£800–£1,500
Major
Emissions system failure
5L petrol engines between 20,000-40,000 miles. The high failure rate is typically caused by secondary air injection valve faults, catalytic converter degradation, or lambda sensor failures. The secondary air system pumps fresh air into the exhaust during cold starts to reduce emissions, but the valves frequently stick or fail, triggering P2441 fault codes and MOT failures.
What happens if ignoredMOT failure requiring repair before the vehicle can be used legally on UK roads. Secondary air valve replacement typically costs £200-£400. Catalytic converter replacement ranges from £400-£800 depending on the specific unit. Lambda sensor replacement costs £150-£300. Delayed repair can lead to catalyst damage if the underlying fault causes overfuelling.
Independent garage
£200–£600
Specialist
£250–£700
Main dealer
£300–£900
Parts only
£150–£500
1 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 Wrx fails at a significantly higher rate than the average car.
Exhaust system damage
Bodywork · 20-40k miles
MOT failure rate: 62x the fleet average
Sample: 1,612 tests
Emissions failure
Exhaust & Emissions · 20-40k miles
MOT failure rate: 26x the fleet average
Sample: 1,752 tests
Anti-roll bar links worn
Suspension · 40-60k miles
MOT failure rate: 6.5x the fleet average
Sample: 747 tests
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Related
Subaru Wrx reliability FAQs
What are the most common problems with the Subaru Wrx?
The Subaru Wrx has 5 known issues across 2 severity levels. The most serious are: Ringland failure (GR/GV), Clutch pedal and bracket failure.
Is the Subaru Wrx reliable?
The Subaru Wrx has 2 dangerous and 3 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 Wrx problems?
Costs vary by issue. Independent garages are typically 30-50% cheaper than main dealers for most repairs.
Which Subaru Wrx generation is most reliable?
The GR (2008–2014) 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.