2015 Subaru Legacy — Full Specifications
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The 2015 Subaru Legacy is a saloon/sedan offered with 2 engines (2.5L 4-cyl, 3.6L 6-cyl). Its most fuel-efficient configuration returns around 35 mpg (UK) / 29 mpg (US EPA) combined, with 28–35 mpg (UK) across all configurations. Owners often keep a Subaru Legacy workshop manual to hand for servicing and repairs.
Compared with the 2014 Subaru Legacy: Fuel economy improves from 32 to 35 mpg (UK) combined on the most efficient configuration. The engine line-up listed by EPA is unchanged. It carries the same 5★ overall NHTSA rating. EPA passenger volume changes from 103 to 105 cu ft.
Full Specifications
| Engine (most efficient) | 2.5L 4-cyl |
|---|---|
| Engine options | 2.5L 4-cyl · 3.6L 6-cyl |
| Transmission (most efficient) | Automatic (AV-S6) |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | All-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 105 cu ft (2,973 L) |
| Luggage Volume (EPA) | 15 cu ft (425 L) |
| Fuel Economy (UK) | 35 combined / 31 urban / 42 extra-urban mpg |
| Fuel Economy (US EPA) | 29 combined / 26 city / 35 highway mpg |
| CO₂ Emissions | 188 g/km |
| EPA Greenhouse Gas Score | 7 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,300 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2015 Subaru Legacy across 2 engines (2.5L 4-cyl, 3.6L 6-cyl). Combined fuel economy ranges from 23 to 29 mpg (US), or 28 to 35 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 2.5L 4-cyl | Automatic (AV-S6) | All-Wheel Drive | 35 | 29 (26/35) | 188 | $2,300 |
| 3.6L 6-cyl | Automatic (AV-S6) | All-Wheel Drive | 28 | 23 (20/28) | 240 | $2,900 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 105 cubic feet (about 2,973 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2015 Subaru Legacy
Running Costs: 2015 Subaru Legacy
Covering around 8,000 miles a year in a 2015 Subaru Legacy at 35 mpg combined, expect roughly 1,039 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,300 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2015 Subaru Legacy Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists 3 safety recall campaigns that include the 2015 Subaru Legacy (as of 6 October 2026). Most affected areas: Electronic stability control (esc) (1), Power train (1), Forward collision avoidance (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Electronic stability control (esc) — campaign 16V251000, reported 27 April 2016. Risk: Poor performance of the electronic stability control system when it is activated may result in a loss of vehicle control, increasing the risk of a crash.
- Power train — campaign 15V502000, reported 10 August 2015. Risk: If the transmission oil leaks onto the exhaust pipe, there is a possible risk of fire.
- Forward collision avoidance — campaign 15V366000, reported 12 June 2015. Risk: If the automatic pre-collision braking system does not function as intended, the vehicle will not react to an obstacle in its path, increasing the risk of a crash.
Owners have filed 159 complaints with NHTSA about the 2015 Subaru Legacy. The most-reported areas are Electrical system (37), Visibility/wiper (36), Unspecified (27). Complaints include 15 reported crashes, 3 reported fires, 10 reported injuries. That is well above the median of 104 complaints across the 16 Subaru Legacy model years in our data.
Used-buyer checklist for the 2015 Subaru Legacy
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Electrical system (37 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Visibility (36 owner complaints) — Check wipers, washers and demisters work properly.
- Engine (23 owner complaints) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
- Stability control (1 recall campaign) — Make sure no stability or traction warning light stays on.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
Subaru models in our database average about 33 mpg (UK) combined on their most efficient configuration; the 2015 Subaru Legacy's 35 mpg is 2 mpg above that make average. Its 188 g/km CO₂ figure is 18 g/km lower than the 206 g/km Subaru average.
Of the 16 Subaru Legacy model years we cover, the 2015 ranks 7th for combined fuel economy on its best configuration (35 mpg UK combined, against a high of 36 mpg). See every Subaru Legacy year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2015 Subaru Legacy
Frequently Asked Questions
What engine does the 2015 Subaru Legacy have?
EPA lists 2 engines for the 2015 Subaru Legacy: 2.5L 4-cyl, 3.6L 6-cyl. The most fuel-efficient configuration pairs the 2.5L 4-cyl with a automatic (av-s6).
What is the fuel economy of the 2015 Subaru Legacy?
The most efficient configuration returns around 35 mpg (UK) combined, or 29 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 28 to 35 mpg.
How much does the 2015 Subaru Legacy cost to fuel per year?
The US EPA estimates about $2,300 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2015 Subaru Legacy have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 5 stars for frontal crash protection.
Does the 2015 Subaru Legacy have any recalls?
NHTSA lists 3 safety recall campaigns that include the 2015 Subaru Legacy (as of 6 October 2026). Most affected areas: Electronic stability control (esc) (1), Power train (1), Forward collision avoidance (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2015 Subaru Legacy?
Among the 159 owner complaints filed with NHTSA, the most-reported areas are Electrical system (37 complaints), Visibility/wiper (36 complaints), Unspecified (27 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2015 Subaru Legacy have?
EPA measures interior passenger volume at 105 cubic feet (about 2,973 litres) and luggage volume at 15 cubic feet (about 425 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.