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 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 2010-2015 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 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 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 2020-2025 Subaru Outback Driver Monitoring System and EyeSight Camera Faults Causing Persistent Warning Messages?

Owners across the 2020-2025 generation report recurring Driver Monitoring System and EyeSight-related warnings such as 'Driver Monitoring System Disabled' or temporary loss of driver-assist functions even in normal conditions. While some events are environmental, complaint patter… Repairs typically run $150-$2,000. Severity: medium.

What is the 2020-2025 Subaru Outback FA24 2.4L Turbo Direct-Injection Intake-Valve Carbon Buildup (XT / Wilderness / Onyx Turbo Models)?

The turbocharged FA24 (FA24F/FA24DIT) 2.4L boxer in Outback XT, Onyx Edition XT, and Wilderness trims uses port-less direct injection only, so fuel never washes the back of the intake valves. Carbon sludge accumulates on the intake ports/valves, typically becoming noticeable arou… Repairs typically run $400-$1,200. Severity: medium.

What is the 2010-2024 Subaru Outback Front and Rear Wheel Hub Bearing Failure Causing Droning/Humming Noise?

Owners across multiple Outback generations report premature wheel hub bearing failure, most commonly showing up between roughly 80,000 and 120,000 miles. The classic symptom is a low-pitched droning/humming or 'beehive' noise that begins around 45-55 mph and gets louder with spee… Repairs typically run $200-$700. 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 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.

Subaru · Known Issues

1999-2026 Subaru Outback Problems: 41 Issues Every Owner Should Know

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

Share:@au7o.io

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), 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), CVT Valve Body / Internal Failure (10yr-100k Warranty Extension) ($0-$4,500 repair), Windshield Wiper Motor Overheating / Bottom-Cover Melt — Crash and Fire Risk (Recall 16V694 / WTK-71). Across all issues, repair costs range from $15 to $4,500. 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, Thermo Control Valve Failure Causing Check Engine Light and Overheating Risk. 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 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 CVT Valve Body / Internal Failure (10yr-100k Warranty Extension) 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

2020-2022 Subaru Outback: Occupant Detection System (ODS) Sensor Failure — Front Passenger Airbag May Not Deploy (Recall 24V-227 / WRA-24)#

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

2010-2014 Subaru Outback: Windshield Wiper Motor Overheating / Bottom-Cover Melt — Crash and Fire Risk (Recall 16V694 / WTK-71)#

2010-2014 Subaru Outback: Takata Passenger Airbag Inflator Explosion Risk (Recall TKB-20)#

2020-2025 Subaru Outback: Driver Monitoring System and EyeSight Camera Faults Causing Persistent Warning Messages#

1999-2010 Subaru Outback: Head Gasket Failure#

2011-2019 Subaru Outback: Excessive Oil Consumption#

2011-2019 Subaru Outback: Head Gasket Issues#

2020-2025 Subaru Outback: FA24 2.4L Turbo Direct-Injection Intake-Valve Carbon Buildup (XT / Wilderness / Onyx Turbo Models)#

2010-2019 Subaru Outback: P0011 — Bank 1 Intake Cam Timing Over-Advanced from Clogged AVCS Banjo-Bolt Filter or Faulty Oil Control Valve#

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#

2013-2019 Subaru Outback: FB25 Cam Carrier / Valve Cover Oil Leak#

2010-2015 Subaru Outback: CVT Valve Body / Internal Failure (10yr-100k Warranty Extension)#

2012-2019 Subaru Outback: CVT Transmission Shudder/Hesitation#

2005-2014 Subaru Outback: P0741 — Torque Converter Clutch Stuck Off from Failed Lockup Solenoid, Bad Trans Ground, or Contaminated Fluid#

2023 Subaru Outback: Front Propeller (Drive) Shaft Separation From Painted Center-Support Brace Bolt Surfaces (Recall 23V647000 / WRN-23)#

2015-2022 Subaru Outback: Rear Differential / Driveline Carrier Bearing Whine#

2020 Subaru Outback: Denso Fuel Pump Impeller Failure Leading to Stalling or No-Start#

2020-2023 Subaru Outback: Thermo Control Valve Failure Causing Check Engine Light and Overheating Risk#

2011-2019 Subaru Outback: A/C Compressor Failure#

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

2015-2024 Subaru Outback: Rodent-Chewed Wiring (Soy-Based Insulation) Causing Electrical Faults#

2018-2019 Subaru Outback: Harman Kardon Touchscreen Delamination / Bubbling and Ghost Touches#

2015-2019 Subaru Outback: Starlink Infotainment Issues#

2014-2019 Subaru Outback: Battery Drain/Weak Battery Issues#

2020-2024 Subaru Outback: Rear Gate Control Module / Power Liftgate Failure and Uncommanded Reversal#

2010-2022 Subaru Outback: Sunroof/Moonroof Drain Tube Clog Causing Interior Water Leaks#

2011-2019 Subaru Outback: Windshield Cracking (Eyesight Equipped)#

2010-2019 Subaru Outback: Rear High-Mount (Third) Brake Light Gasket Failure Causing Cargo-Area Water Leaks#

2010-2019 Subaru Outback: P0430 — Bank 2 (Driver-Side) Catalytic Converter Efficiency Loss, Often Preceded by Oil-Coked Rear O2 Sensor#

2010-2022 Subaru Outback: P0455 — Gross EVAP Leak from Failed Purge Control Solenoid or Charcoal Canister Assembly#

2011-2019 Subaru Outback: Catalytic Converter / Front Exhaust Pipe Failure Triggering P0420#