What is the 1999-2010 Subaru Outback Head Gasket Failure?

The 2.5L non-turbo engine is known for external head gasket leaks. Oil seeps past the gasket and can contaminate the coolant. Subaru extended warranties and improved gasket design in later years. Repairs typically run $1,500-$2,500. Severity: high.

What is the 2020 Subaru Outback Denso Fuel Pump Impeller Failure Leading to Stalling or No-Start?

Certain 2020 Outback vehicles were included in the large Denso low-pressure fuel pump recall affecting many manufacturers. The impeller can deform, causing the pump to seize or lose output, which may result in hard starting, rough running, engine stall, or a no-start condition. T… Repairs typically run $0-$900. Severity: high.

What is the 2010-2015 Subaru Outback CVT Valve Body / Internal Failure (10yr-100k Warranty Extension)?

Early Lineartronic CVT Outbacks (2010-2015) have documented internal CVT failures — most commonly valve-body faults, but also chain/pulley and pressure-control problems — that can cause harsh or delayed engagement, RPM flare, jerking, limp mode, or complete loss of drive. Subaru… Repairs typically run $0-$4,500. Severity: high.

What is the 2020-2023 Subaru Outback Thermo Control Valve Failure Causing Check Engine Light and Overheating Risk?

Multiple 2020-2023 Outback owners with the 2.5L FB25 engine report failure of the thermo control valve assembly, which can trigger a check engine light, disable normal coolant flow control, and in some cases lead to overheating or poor heater performance. Subaru issued a warranty… Repairs typically run $900-$1,800. Severity: high.

What is the 2010-2014 Subaru Outback Takata Passenger Airbag Inflator Explosion Risk (Recall TKB-20)?

Older Outbacks (part of the 2003-2014 Subaru population) are covered by the industry-wide Takata airbag recall for the FRONT PASSENGER airbag inflator. The ammonium-nitrate propellant can degrade after years of exposure to heat, humidity, and temperature cycling, causing the infl… Repairs typically run $0-$0. Severity: high.

What is the 2011-2019 Subaru Outback Excessive Oil Consumption?

The FB25 2.5L engine is known for excessive oil consumption, sometimes using 1 quart every 1,000-2,000 miles. Subaru extended warranty coverage and offered piston ring replacement for affected vehicles. Most common on 2011-2014 models. Repairs typically run $0-$4,000. Severity: medium.

What is the 2012-2019 Subaru Outback CVT Transmission Shudder/Hesitation?

The Lineartronic CVT can develop shudder, hesitation, or jerky operation, especially during light acceleration at low speeds. Subaru has updated CVT software multiple times to address these concerns. Repairs typically run $0-$4,000. Severity: medium.

What is the 2011-2019 Subaru Outback Head Gasket Issues?

While the FB25 has improved head gasket reliability compared to older EJ engines, some vehicles still experience head gasket failures. External oil leaks and coolant leaks can develop, particularly at higher mileage. Repairs typically run $1,200-$2,500. Severity: medium.

What is the 2011-2019 Subaru Outback A/C Compressor Failure?

The A/C compressor can fail, particularly on vehicles in hot climates with heavy A/C usage. Internal compressor failure can contaminate the A/C system with debris. Repairs typically run $600-$1,500. Severity: medium.

What is the 2021-2023 Subaru Outback Inhibitor (Park/Neutral) Switch Water Intrusion Disabling Reverse Lights and Rearview Camera (Recall 23V755000 / WRQ-23)?

An insufficient weld between the switch stator and cover of the transmission inhibitor (park/neutral start interlock) switch allows water intrusion over time, causing the switch to become inoperative. When it fails, the reverse lights do not illuminate and the rearview/backup cam… Repairs typically run $0-$0. Severity: medium.

What is the 2010-2022 Subaru Outback P0455 — Gross EVAP Leak from Failed Purge Control Solenoid or Charcoal Canister Assembly?

P0455 indicates a large (gross) EVAP leak — the system can't hold pressure/vacuum at all during the self-test. Across the Subaru lineup (Outback, Forester, Impreza, Crosstrek) the standout pattern is the purge control solenoid valve failing due to internal seal degradation, which… Repairs typically run $30-$700. Severity: medium.

What is the 2013-2019 Subaru Outback P0016 — Bank 1 Crank/Cam Correlation Fault from Low/Dirty Oil, Clogged Banjo-Bolt Filter Screen, or Failed AVCS Oil Control Valve?

P0016 means the ECM sees the Bank 1 (passenger-side) intake camshaft out of sync with the crankshaft. Subaru's variable valve timing (AVCS) is oil-pressure driven, so on the FB-series Outback (FB25/FB20) this code is highly sensitive to oil level and condition. The common Subaru-… Repairs typically run $70-$2,500. Severity: medium.

What is the 2015-2022 Subaru Outback A/C Condenser / Refrigerant Line Leak Causing Loss of Cooling?

The forward-mounted A/C condenser and its connecting refrigerant lines are vulnerable to leaks - sometimes from road-debris/stone damage to the thin condenser, sometimes from a damaged line or failed O-ring at a hose connection. The system slowly loses refrigerant and cooling fad… Repairs typically run $500-$1,100. Severity: medium.

What is the 2020-2024 Subaru Outback Seat Heater Failure or Overheating in Front Seats?

Owners have reported front seat heaters that stop working, heat unevenly, or become excessively hot in localized areas. Complaints and forum reports point to failures in the seat heater element, thermostat/control logic, or seat cushion wiring within this generation. The issue is… Repairs typically run $300-$1,200. Severity: medium.

What is the 2020-2024 Subaru Outback Rear Gate Control Module / Power Liftgate Failure and Uncommanded Reversal?

Owners of 2020-2024 Outbacks frequently report power rear gate problems including failure to open or close, repeated beeping, stopping mid-travel, or reversing unexpectedly. Subaru issued service information for rear gate control module logic and initialization issues, and owner… Repairs typically run $150-$1,800. Severity: medium.

What is the 2011-2019 Subaru Outback Catalytic Converter / Front Exhaust Pipe Failure Triggering P0420?

2.5L Outbacks are prone to premature catalytic converter degradation that sets a P0420 (Catalyst System Efficiency Below Threshold) check-engine light, often well before 100,000 miles. On some 2015-2016 2.5L Legacy/Outback models the front exhaust pipe assembly (which houses the… Repairs typically run $0-$2,500. Severity: medium.

Subaru · Known Issues

1999-2026 Subaru Outback Problems: 41 Known Issues

1999-2026 model years · 12,181+ owner reports · Updated August 2026

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According to Au7o's analysis of 12,181+ owner reports, the 1999-2026 Subaru Outback has 41 documented known issues, with 9 rated critical. The most serious are Head Gasket Failure ($1,500-$2,500 repair), Denso Fuel Pump Impeller Failure Leading to Stalling or No-Start ($0-$900 repair), CVT Valve Body / Internal Failure (10yr-100k Warranty Extension) ($0-$4,500 repair), Thermo Control Valve Failure Causing Check Engine Light and Overheating Risk ($900-$1,800 repair), Front Propeller (Drive) Shaft Separation From Painted Center-Support Brace Bolt Surfaces (Recall 23V647000 / WRN-23) ($0-$0 repair), Occupant Detection System (ODS) Sensor Failure — Front Passenger Airbag May Not Deploy (Recall 24V-227 / WRA-24) ($0-$0 repair), EyeSight Unintended / Phantom Automatic Emergency Braking (2023-2026 Pre-Collision Braking Defect, Hall v. Subaru) ($0-$0 repair), Windshield Wiper Motor Overheating / Bottom-Cover Melt — Crash and Fire Risk (Recall 16V694 / WTK-71). at .

Frequently Asked Questions

What are the most common Subaru Outback problems?

According to Au7o's analysis of 12,181+ owner reports, the 1999-2026 Subaru Outback has 41 documented issues. The most frequently reported are: Head Gasket Failure, Denso Fuel Pump Impeller Failure Leading to Stalling or No-Start, CVT Valve Body / Internal Failure (10yr-100k Warranty Extension). Of these, 9 are rated critical and should be addressed promptly.

Is the Subaru Outback reliable?

The 1999-2026 Subaru Outback has 41 known issues documented across 12,181+ owner reports. 9 issues are rated critical: Head Gasket Failure and Denso Fuel Pump Impeller Failure Leading to Stalling or No-Start and CVT Valve Body / Internal Failure (10yr-100k Warranty Extension) and Thermo Control Valve Failure Causing Check Engine Light and Overheating Risk and Front Propeller (Drive) Shaft Separation From Painted Center-Support Brace Bolt Surfaces (Recall 23V647000 / WRN-23) and Occupant Detection System (ODS) Sensor Failure — Front Passenger Airbag May Not Deploy (Recall 24V-227 / WRA-24) and EyeSight Unintended / Phantom Automatic Emergency Braking (2023-2026 Pre-Collision Braking Defect, Hall v. Subaru) and Windshield Wiper Motor Overheating / Bottom-Cover Melt — Crash and Fire Risk (Recall 16V694 / WTK-71) and Takata Passenger Airbag Inflator Explosion Risk (Recall TKB-20). 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 Outback problems?

Repair costs for known Subaru Outback issues range from $0 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Head Gasket Failure, typically costs $1,500-$2,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Subaru Outback is the most reliable?

Reliability varies across model years of the Subaru Outback. 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 1999-2026 Subaru Outback with 41 documented issues documented across 12,181+ owner reports.

All 41 Known Issues

Other Subaru Models

Frequently Asked Questions

What are the most common Subaru Outback problems?

Is the Subaru Outback reliable?

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

What year Subaru Outback is the most reliable?

When Issues Typically Appear

Occupant Detection System (ODS) Sensor Failure — Front Passenger Airbag May Not Deploy (Recall 24V-227 / WRA-24)#

EyeSight Unintended / Phantom Automatic Emergency Braking (2023-2026 Pre-Collision Braking Defect, Hall v. Subaru)#

Windshield Wiper Motor Overheating / Bottom-Cover Melt — Crash and Fire Risk (Recall 16V694 / WTK-71)#

Takata Passenger Airbag Inflator Explosion Risk (Recall TKB-20)#

Driver Monitoring System and EyeSight Camera Faults Causing Persistent Warning Messages#

Head Gasket Failure#

Excessive Oil Consumption#

Head Gasket Issues#

P0016 — Bank 1 Crank/Cam Correlation Fault from Low/Dirty Oil, Clogged Banjo-Bolt Filter Screen, or Failed AVCS Oil Control Valve#

FA24 2.4L Turbo Direct-Injection Intake-Valve Carbon Buildup (XT / Wilderness / Onyx Turbo Models)#

P0011 — Bank 1 Intake Cam Timing Over-Advanced from Clogged AVCS Banjo-Bolt Filter or Faulty Oil Control Valve#

FB25 Cam Carrier / Valve Cover Oil Leak#

CVT Valve Body / Internal Failure (10yr-100k Warranty Extension)#

CVT Transmission Shudder/Hesitation#

P0741 — Torque Converter Clutch Stuck Off from Failed Lockup Solenoid, Bad Trans Ground, or Contaminated Fluid#

Front Propeller (Drive) Shaft Separation From Painted Center-Support Brace Bolt Surfaces (Recall 23V647000 / WRN-23)#

Rear Differential / Driveline Carrier Bearing Whine#

Denso Fuel Pump Impeller Failure Leading to Stalling or No-Start#

Thermo Control Valve Failure Causing Check Engine Light and Overheating Risk#

A/C Compressor Failure#

Inhibitor (Park/Neutral) Switch Water Intrusion Disabling Reverse Lights and Rearview Camera (Recall 23V755000 / WRQ-23)#

Rodent-Chewed Wiring (Soy-Based Insulation) Causing Electrical Faults#

Harman Kardon Touchscreen Delamination / Bubbling and Ghost Touches#

Starlink Infotainment Issues#

Battery Drain/Weak Battery Issues#

P0455 — Gross EVAP Leak from Failed Purge Control Solenoid or Charcoal Canister Assembly#

Catalytic Converter / Front Exhaust Pipe Failure Triggering P0420#

P0430 — Bank 2 (Driver-Side) Catalytic Converter Efficiency Loss, Often Preceded by Oil-Coked Rear O2 Sensor#

P0442 — Small EVAP Leak from Gas Cap O-Ring or Leaking Purge/Vent Valve#