2015 Buick LaCrosse — Full Specifications
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The 2015 Buick LaCrosse is a saloon/sedan offered with 2 engines (2.4L 4-cyl, 3.6L 6-cyl). Its most fuel-efficient configuration returns around 25 mpg (UK) / 21 mpg (US EPA) combined, with 24–34 mpg (UK) across all configurations. A hybrid version is also listed by EPA (2.4L 4-cyl), returning around 34 mpg (UK) combined. Owners often keep a Buick LaCrosse workshop manual to hand for servicing and repairs.
Compared with the 2014 Buick LaCrosse: Fuel economy is essentially unchanged at around 25 mpg (UK) combined. The engine line-up listed by EPA is unchanged. It carries the same 5★ overall NHTSA rating.
Full Specifications
| Engine (most efficient) | 3.6L 6-cyl |
|---|---|
| Engine options | 2.4L 4-cyl · 3.6L 6-cyl |
| Transmission (most efficient) | Automatic (S6) |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 100 cu ft (2,832 L) |
| Luggage Volume (EPA) | 16 cu ft (453 L) |
| Fuel Economy (UK) | 25 combined / 22 urban / 34 extra-urban mpg |
| Fuel Economy (US EPA) | 21 combined / 18 city / 28 highway mpg |
| CO₂ Emissions | 260 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,200 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 4 configurations for the 2015 Buick LaCrosse across 2 engines (2.4L 4-cyl, 3.6L 6-cyl). Combined fuel economy ranges from 20 to 28 mpg (US), or 24 to 34 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 |
|---|---|---|---|---|---|---|
| 2.4L 4-cyl (Hybrid) | Automatic (S6) | Front-Wheel Drive | 34 | 28 (24/35) | 195 | $2,400 |
| 3.6L 6-cyl | Automatic (S6) | All-Wheel Drive | 24 | 20 (17/26) | 276 | $3,350 |
| 3.6L 6-cyl | Automatic (S6) | Front-Wheel Drive | 25 | 21 (18/28) | 260 | $3,200 |
| 3.6L 6-cyl | Automatic (S6) | Front-Wheel Drive | 25 | 21 (18/28) | 262 | $3,200 |
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 100 cubic feet (about 2,832 litres) and luggage volume at 16 cubic feet (about 453 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 Buick LaCrosse
Running Costs: 2015 Buick LaCrosse
Covering around 8,000 miles a year in a 2015 Buick LaCrosse at 25 mpg combined, expect roughly 1,455 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,200 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 Buick LaCrosse Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists 3 safety recall campaigns that include the 2015 Buick LaCrosse (as of 6 October 2026). Most affected areas: Air bags (3). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Air bags — campaign 17V437000, reported 10 July 2017. Risk: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
- Air bags — campaign 16V651000, reported 8 September 2016. Risk: A failure of the front air bags or seat belt pretensioners to deploy in the event of a crash necessitating deployment increases the risk of injury to the driver and front passenger.
- Air bags — campaign 15V666000, reported 16 October 2015. Risk: In the event of a crash necessitating deployment of one or both of the side impact air bags, the air bag's inflator may rupture and the air bag may not properly inflate. The rupture could cause metal fragments…
Owners have filed 44 complaints with NHTSA about the 2015 Buick LaCrosse. The most-reported areas are Steering (12), Electrical system (9), Air bags (7). Complaints include 5 reported crashes, 4 reported injuries. That is close to the median of 48 complaints across the 9 Buick LaCrosse model years in our data.
Used-buyer checklist for the 2015 Buick LaCrosse
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Air bags (3 recall campaigns · 7 owner complaints) — Confirm any air bag inflator or module recalls were completed — enter the VIN at nhtsa.gov/recalls.
- Steering (12 owner complaints) — Check for play, noise or heavy steering, and ask whether any steering recall work was done.
- Electrical system (9 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
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
Buick models in our database average about 29 mpg (UK) combined on their most efficient configuration; the 2015 Buick LaCrosse's 25 mpg is 4 mpg below that make average. Its 260 g/km CO₂ figure is 27 g/km higher than the 233 g/km Buick average.
Of the 9 Buick LaCrosse model years we cover, the 2015 ranks 5th for combined fuel economy on its best configuration (25 mpg UK combined, against a high of 30 mpg). See every Buick LaCrosse 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 Buick LaCrosse
Frequently Asked Questions
What engine does the 2015 Buick LaCrosse have?
EPA lists 2 engines for the 2015 Buick LaCrosse: 2.4L 4-cyl, 3.6L 6-cyl. The most fuel-efficient configuration pairs the 3.6L 6-cyl with a automatic (s6).
What is the fuel economy of the 2015 Buick LaCrosse?
The most efficient configuration returns around 25 mpg (UK) combined, or 21 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 24 to 34 mpg. The hybrid version returns around 34 mpg (UK) combined.
How much does the 2015 Buick LaCrosse cost to fuel per year?
The US EPA estimates about $3,200 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 Buick LaCrosse have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 5 stars for frontal crash protection.
Does the 2015 Buick LaCrosse have any recalls?
NHTSA lists 3 safety recall campaigns that include the 2015 Buick LaCrosse (as of 6 October 2026). Most affected areas: Air bags (3). 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 Buick LaCrosse?
Among the 44 owner complaints filed with NHTSA, the most-reported areas are Steering (12 complaints), Electrical system (9 complaints), Air bags (7 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 Buick LaCrosse have?
EPA measures interior passenger volume at 100 cubic feet (about 2,832 litres) and luggage volume at 16 cubic feet (about 453 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.