What is the 2015-2021 Subaru WRX Piston Ringland Failure?

The FA20DIT engine can suffer from piston ringland failure, especially when tuned or running high boost. The ringland (area between piston rings) can crack, causing compression loss and engine damage. This is often related to detonation from improper tuning or low octane fuel. Repairs typically run $4,000-$10,000. Severity: high.

What is the 2015-2021 Subaru WRX Excessive Oil Consumption?

The FA20DIT engine can consume oil at a rate higher than expected, sometimes up to 1 quart every 1,000-3,000 miles. This is often related to the turbocharger, PCV system, or piston ring design. Subaru considers up to 1 quart per 1,200 miles as within normal range. Repairs typically run $0-$3,000. Severity: medium.

What is the 2024-2025 Subaru WRX Eyesight Driver-Assist Disablement and Warning Lights on CVT Models?

For 2024+ WRX models equipped with the Subaru Performance Transmission, owners have reported EyeSight and related driver-assistance features becoming unavailable, often accompanied by warning messages and disabled adaptive cruise or pre-collision functions. This is well documente… Repairs typically run $0-$1,800. Severity: medium.

What is the 2022-2025 Subaru WRX Rear Differential / Final Drive Whine or Howl at Highway Speeds?

Owners of the current WRX have documented a pronounced rear driveline whine or howl, most noticeable during steady-state cruising between roughly 45 and 75 mph. Reports commonly describe the noise as coming from the rear of the vehicle and changing with road speed rather than eng… Repairs typically run $120-$2,500. Severity: medium.

What is the 2022-2025 Subaru WRX FA24 Turbo Oil Feed Line / Banjo Bolt Leak Causing Burning Oil Smell and Smoke?

Multiple VB-generation WRX owners have reported oil leaking from the turbocharger oil feed area, often traced to the banjo bolt or sealing washers on the turbo oil supply line. The leak typically shows up as a burning oil smell after driving, light smoke from the engine bay, or v… Repairs typically run $150-$700. Severity: medium.

What is the 2002-2014 Subaru WRX Power Steering Pump and Suction Hose Air Leak Causing Whine, Foamy Fluid, and Heavy Steering?

A common WRX complaint is a groaning or whining power steering system, especially when cold, often traced to the pump inlet O-ring or suction hose allowing air into the system. Aerated fluid becomes foamy in the reservoir and steering assist can feel inconsistent or heavy at low… Repairs typically run $50-$700. Severity: medium.

What is the 2008-2021 Subaru WRX Manual Transmission 2nd/3rd Gear Synchro Grind and Notchy Cold Shifting?

Owners of the WRX 5-speed (2008-2014 GR/GV) and 6-speed manual (2015+ VA WRX and the STI 6MT) gearboxes widely report grinding or 'crunching' when shifting into 2nd or 3rd gear, worst on higher-RPM/aggressive shifts and when the transmission is cold. The root cause is premature w… Repairs typically run $200-$3,500. Severity: medium.

What is the 2006-2014 Subaru WRX Secondary Air Injection Pump and Switching Valve Failure Triggering CEL and Limp Mode?

Turbo EJ255/EJ257 WRX models equipped with the secondary air injection system commonly develop failures of the air pump, pressure sensor, or the air switching valves. Moisture intrusion and corrosion can cause the valves to stick or the pump to seize, which sets emissions faults… Repairs typically run $700-$2,200. Severity: medium.

What is the 2002-2007 Subaru WRX Fuel Filler Neck Corrosion Causing EVAP Leaks, Fuel Smell, and Check-Engine Light?

Rust-belt GD-chassis WRX models are known for corrosion of the steel fuel filler neck and vent tubes behind the left rear wheel area. As the neck rusts through, owners notice a raw fuel smell, difficulty filling the tank, or EVAP leak codes from the compromised venting system. Su… Repairs typically run $300-$900. Severity: medium.

What is the 2002-2014 Subaru WRX Radiator End Tank Cracking and Coolant Leaks on Plastic-Aluminum OEM Radiators?

Many 2002-2014 WRX owners report coolant leaks from the crimped plastic end tanks of the factory radiator, especially as the car ages and sees repeated heat cycles. Cracks often form near the upper tank seam or hose neck, leading to a sweet coolant smell, low coolant level, and e… Repairs typically run $250-$900. Severity: medium.

What is the 2015-2021 Subaru WRX FA20DIT Intake Valve Carbon Buildup Causing Misfires, Rough Idle, and Power Loss on Direct-Injection WRX?

The 2015-2021 WRX's FA20DIT is direct-injected, so no fuel washes over the backs of the intake valves. Oil vapor from the PCV system and blow-by bakes onto the valves and ports, and owners tearing into engines at 40k-80k miles find heavy coking. Symptoms build gradually: rough co… Repairs typically run $400-$1,200. Severity: medium.

What is the 2002-2007 Subaru WRX Front Wheel Bearing Grease Breakdown Causing Premature Bearing Failure and Highway Hum on GD-Chassis WRX?

2002-2007 (GD chassis) WRX front wheel bearings fail early — often well under 80k miles — with a speed-dependent hum or roar that changes when the car is loaded into a turn. The community consensus, backed by a Subaru service bulletin covering 2001+ Impreza models, is that the fa… Repairs typically run $250-$700. Severity: medium.

Subaru · Known Issues

2002-2025 Subaru WRX Problems: 31 Known Issues

2002-2025 model years · 6,380+ owner reports · Updated September 2026

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According to Au7o's analysis of 6,380+ owner reports, the 2002-2025 Subaru WRX has 31 documented known issues, with 9 rated critical. The most serious are Piston Ringland Failure ($4,000-$10,000 repair), Firewall Spot-Weld Cracking and Clutch Pedal Bracket Flex Causing Hard Shifting or Clutch Engagement Problems ($400-$1,800 repair), Front Driveshaft Outer-Race Quench Cracking Leading to Fracture and Power Loss (Recall 23V-754) ($0-$900 repair), Denso Low-Pressure Fuel Pump Impeller Deformation Causing Engine Stall (Recall 21V-587) ($0-$700 repair), Engine Fuel Delivery Line-to-Hose Connection Seeping Fuel on Cold Starts Causing Raw Fuel Smell (Recall 09V-468) ($0-$500 repair), EJ255 Turbocharger Oil Starvation from Clogged Banjo-Bolt Filter Screen Causing Turbo Failure and AVCS Timing Codes ($150-$2,500 repair), EJ255 Oil Pickup Tube Brazed-Joint Cracking Leading to Oil Starvation and Spun Rod Bearings ($300-$8,000 repair), . at .

Frequently Asked Questions

What are the most common Subaru WRX problems?

According to Au7o's analysis of 6,380+ owner reports, the 2002-2025 Subaru WRX has 31 documented issues. The most frequently reported are: Piston Ringland Failure, Firewall Spot-Weld Cracking and Clutch Pedal Bracket Flex Causing Hard Shifting or Clutch Engagement Problems, Front Driveshaft Outer-Race Quench Cracking Leading to Fracture and Power Loss (Recall 23V-754). Of these, 9 are rated critical and should be addressed promptly.

Is the Subaru WRX reliable?

The 2002-2025 Subaru WRX has 31 known issues documented across 6,380+ owner reports. 9 issues are rated critical: Piston Ringland Failure and Firewall Spot-Weld Cracking and Clutch Pedal Bracket Flex Causing Hard Shifting or Clutch Engagement Problems and Front Driveshaft Outer-Race Quench Cracking Leading to Fracture and Power Loss (Recall 23V-754) and Denso Low-Pressure Fuel Pump Impeller Deformation Causing Engine Stall (Recall 21V-587) and Engine Fuel Delivery Line-to-Hose Connection Seeping Fuel on Cold Starts Causing Raw Fuel Smell (Recall 09V-468) and EJ255 Turbocharger Oil Starvation from Clogged Banjo-Bolt Filter Screen Causing Turbo Failure and AVCS Timing Codes and EJ255 Oil Pickup Tube Brazed-Joint Cracking Leading to Oil Starvation and Spun Rod Bearings and Brake Line Corrosion at Four-Way Joint from Salt-Water Intrusion Causing Fluid Leak and Long Pedal (Recall 14V-311) and Takata Airbag Inflator Rupture Risk on 2003-2014 Impreza WRX (Multiple Recall Campaigns). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Subaru WRX problems?

Repair costs for known Subaru WRX issues range from $0 to $10,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Piston Ringland Failure, typically costs $4,000-$10,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Subaru WRX is the most reliable?

Reliability varies across model years of the Subaru WRX. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2002-2025 Subaru WRX with 31 documented issues documented across 6,380+ owner reports.

All 31 Known Issues

Other Subaru Models

Frequently Asked Questions

What are the most common Subaru WRX problems?

Is the Subaru WRX reliable?

How much does it cost to fix common Subaru WRX problems?

What year Subaru WRX is the most reliable?

When Issues Typically Appear

Piston Ringland Failure#

EJ255 Turbocharger Oil Starvation from Clogged Banjo-Bolt Filter Screen Causing Turbo Failure and AVCS Timing Codes#

EJ255 Oil Pickup Tube Brazed-Joint Cracking Leading to Oil Starvation and Spun Rod Bearings#

Excessive Oil Consumption#

FA24 Turbo Oil Feed Line / Banjo Bolt Leak Causing Burning Oil Smell and Smoke#

Secondary Air Injection Pump and Switching Valve Failure Triggering CEL and Limp Mode#

FA20DIT Intake Valve Carbon Buildup Causing Misfires, Rough Idle, and Power Loss on Direct-Injection WRX#

Turbocharger Air Intake Duct Cracking from Incorrect Material Causing Rough Idle and Stalling (Recall 16V-162)#

Tumble Generator Valve (TGV) Shaft Seizure or Actuator Failure Setting P2004-P2007 and Forcing Limp Mode#

Throttle Rev-Hang (Slow RPM Drop)#

Denso Low-Pressure Fuel Pump Impeller Deformation Causing Engine Stall (Recall 21V-587)#

Engine Fuel Delivery Line-to-Hose Connection Seeping Fuel on Cold Starts Causing Raw Fuel Smell (Recall 09V-468)#

Fuel Filler Neck Corrosion Causing EVAP Leaks, Fuel Smell, and Check-Engine Light#

Takata Airbag Inflator Rupture Risk on 2003-2014 Impreza WRX (Multiple Recall Campaigns)#

Eyesight Driver-Assist Disablement and Warning Lights on CVT Models#

High Beam Assist Sensitivity Instructions Incorrect in Owner's Manual on EyeSight-Equipped 2022 WRX (Recall 23V-016)#

Front Driveshaft Outer-Race Quench Cracking Leading to Fracture and Power Loss (Recall 23V-754)#

Rear Differential / Final Drive Whine or Howl at Highway Speeds#

Brake Line Corrosion at Four-Way Joint from Salt-Water Intrusion Causing Fluid Leak and Long Pedal (Recall 14V-311)#

Brake Pedal Squeak / Creak from Pedal Bracket or Booster Area#

Firewall Spot-Weld Cracking and Clutch Pedal Bracket Flex Causing Hard Shifting or Clutch Engagement Problems#

Power Steering Pump and Suction Hose Air Leak Causing Whine, Foamy Fluid, and Heavy Steering#

Front Wheel Bearing Grease Breakdown Causing Premature Bearing Failure and Highway Hum on GD-Chassis WRX#

Front Suspension Clunk Over Bumps#

Manual Transmission 2nd/3rd Gear Synchro Grind and Notchy Cold Shifting#

Throw-Out Bearing Chirp/Failure#

Clutch Judder/Chatter When Engaging#

Starlink Infotainment Freezing/Lag#

Battery Drain / No-Start After Sitting Due to Low Quiescent Voltage#