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Subaru Legacy — what actually breaks, by engine

2015–2025 · 645 federal complaints · 2 engines

Reliability ratings usually stop at the model. But two Legacys with different engines can fail in completely different ways — and the engine is a choice you make at purchase. Here is what owners actually complained about, separated by engine.

Subaru Legacy
Photo: Kevauto · CC BY-SA 4.0

Ownership profile

Each axis is this model's percentile within its own segment — comparing a pickup's fuel economy against a compact car's would say nothing. Built from EPA test data.

Fuel economy71Running cost67Low emissions71Cabin space92Cargo space66Displacement40
28 MPG Fuel economy$2,200/yr Running cost320 g/mi Low emissions105 cu ft Cabin space15 cu ft Cargo space2.5 L Displacement

Value for money

89/ 100

$22,095

Capability per relative dollar, ranked against the same segment. It divides this model's average percentile across the axes above by its price relative to the segment median — so 80 means it delivers more per dollar than 80% of its class.

Price source: CarAPI vehicle trim database — base-trim MSRP, median across 2015-2020 model years. Unlike every other figure on this page, the price does not come from a federal record. It is the manufacturer's list price for the cheapest trim — what people actually paid varies with incentives and options, so treat this one axis as indicative, not exact.

What each engine's complaints are about

Share of component mentions. One complaint can name several components, so these describe what an engine's complaints are about — they are not a failure rate.

Transmission & drivetrainEngineBrakesElectricalSteeringBody & structureFuel systemEverything else

2.5L H4

2015–2025 · Naturally aspirated

586complaints
Electrical 21%
Show the numbers
ComponentShareMentions
Transmission & drivetrain3.1%23
Engine4.5%33
Brakes3.0%22
Electrical21.5%158
Steering4.1%30
Body & structure2.0%15
Fuel system2.4%18
Everything else59.4%437

3.6L H6

2016–2019 · Naturally aspirated

59complaints
Electrical 25%
Show the numbers
ComponentShareMentions
Transmission & drivetrain5.2%4
Engine6.5%5
Brakes2.6%2
Electrical24.7%19
Steering3.9%3
Body & structure5.2%4
Fuel system2.6%2
Everything else49.4%38

Diagrams show cylinder layout and displacement from the decoded VIN data. Turbo and supercharger marks come from EPA certification records; where EPA cannot tell two engines of the same size apart, the mark is left off rather than guessed.

How many of those complaints involved a fire, crash or injury

Unlike the totals above, these can be compared between engines. Each figure is a share of that engine's own complaints, so how many were sold cancels out. The vertical mark is the average across every vehicle in this database.

2.5L H4

586
Fire1.0%
Crash4.6%
Injury2.0%

all vehicles — Fire 1.1% · Crash 4.4% · Injury 2.6%

Still a share of complaints, not of vehicles on the road — it says how severe this engine's reported problems were, not how often it gets into trouble. Engines with fewer than 80 complaints are left out: fire is rare enough that a single extra case would swing the number.

Recalls on this model

Unlike everything above, recalls are issued for the whole model, not per engine — NHTSA publishes them by make, model and year. These are defects the manufacturer confirmed and filed federally, which makes them a useful counterweight to owner-reported complaints.

NHTSA told owners to stop driving these

  • Steering › Column — 2016–2017 16V292000

18 recalls · covering 2015–2023

Power Train 6Steering 2Fuel System, Gasoline 2Air Bags 1Back Over Prevention 1Service Brakes, Hydraulic 1Structure 1Visibility 1
All recalls, with campaign numbers
YearsComponentNHTSA campaign
2016–2017Steering › Column16V292000
2020–2022Air Bags › Sensor › Occupant Classification › Front Passenger24V227000
2021–2023Power Train › Automatic Transmission › Park/Neutral Start Interlock Switch23V755000
2023–2023Power Train › Driveline › Driveshaft23V647000
2020–2021Power Train › Automatic Transmission › Control Module (Tcm/Pcm/Tecm)22V485000
2020–2020Power Train › Automatic Transmission › Control Module (Tcm/Pcm/Tecm)21V955000
2018–2020Fuel System, Gasoline › Delivery › Fuel Pump21V587000
2020–2020Back Over Prevention › Display Function20V766000
2019–2019Fuel System, Gasoline › Delivery › Fuel Pump20V218000
2020–2020Service Brakes, Hydraulic › Pedals And Linkages19V664000
2019–2019Structure19V493000
2018–2018Visibility › Rearview Mirrors/Devices18V935000
2018–2018Electrical System › Software18V773000
2017–2017Steering › Column16V716000
2015–2015Electronic Stability Control (Esc)16V251000
2016–2016Power Train › Driveline › Driveshaft15V794000
2015–2016Power Train › Driveline › Driveshaft15V502000
2015–2015Forward Collision Avoidance › Crash Imminent Braking15V366000

Recall repairs are free, always — any franchised dealer, regardless of the car's age, mileage, or how many owners it has had. A great many cars are driving around with recalls nobody ever redeemed.

More recalls does not mean a worse car. Recall counts rise with sales volume and model complexity, and a manufacturer that recalls promptly looks worse than one that drags its feet. Read what the recalls were for, not how many there were.

Check a specific car by VIN at NHTSA →

NHTSA crash-test ratings

Official 5-star ratings from standardized federal crash tests. Unlike the complaint figures above, these are directly comparable between models. Where a model year was tested in several versions, the lowest overall rating is shown.

Overall · 2025
★★★★★
Frontal · 2025
★★★★★
Side · 2025
★★★★★
Rollover · 2025
★★★★★

10.1% rollover risk

Model yearOverallFrontalSideRollover
2015★★★★★★★★★★★★★★★★★★★★
2016★★★★★★★★★★★★★★★★★★★★
2017★★★★★★★★★★★★★★★★★★★★
2018★★★★★★★★★★★★★★★★★★★★
2019★★★★★★★★★★★★★★★★★★★★
2020★★★★★★★★★★★★★★★★★★★★
2021★★★★★★★★★★★★★★★★★★★★
2022★★★★★★★★★★★★★★★★★★★★
2023★★★★★★★★★★★★★★★★★★★★
2024★★★★★★★★★★★★★★★★★★★★
2025★★★★★★★★★★★★★★★★★★★★
Stability control: StandardLane-departure warning: Standard

Source: NHTSA New Car Assessment Program.

Method, sources and limitations

How this was built

  1. Source: NHTSA public complaint database (api.nhtsa.gov), retrieved 2026-08-16. Every complaint carries the first 11 characters of the vehicle's VIN.
  2. Those partial VINs were decoded through NHTSA's vPIC service to identify the exact engine — 98.2% resolved successfully. This is how the data gets to engine level; model-level ratings cannot do this.
  3. Percentages are the share of component mentions, not of complaints. One complaint can name several components, so the figures describe what a given engine's complaints are about — they do not sum to a failure rate.

What this does not tell you

  • This is not a reliability ranking. Complaint totals track how many were sold, not how often they fail. Nobody publishes per-engine sales volume, so comparing totals between engines would be misleading. Read each engine's own breakdown; don't race them against each other.
  • Engines with fewer than 50 complaints are omitted — too small to say anything honest about.
  • Complaints are self-reported by owners. They skew toward problems that are alarming or expensive, and toward vehicles under active recall attention.

Compare with

Or see the whole segment at once: Midsize sedan →

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