2015 Mazda 3 4-Door — Full Specifications
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The 2015 Mazda 3 4-Door is a saloon/sedan offered with 2 engines (2L 4-cyl, 2.5L 4-cyl). Its most fuel-efficient configuration returns around 40 mpg (UK) / 33 mpg (US EPA) combined, with 35–40 mpg (UK) across all configurations. Owners often keep a Mazda 3 4-Door workshop manual to hand for servicing and repairs.
Related listing: see also the 2015 Mazda 3 page for the base 3 listing, which may cover additional engines and body styles.
Compared with the 2014 Mazda 3 4-Door: Fuel economy is essentially unchanged at around 40 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) | 2L 4-cyl |
|---|---|
| Engine options | 2L 4-cyl · 2.5L 4-cyl |
| Transmission (most efficient) | Automatic (S6) |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 96 cu ft (2,718 L) |
| Luggage Volume (EPA) | 12 cu ft (340 L) |
| Fuel Economy (UK) | 40 combined / 36 urban / 48 extra-urban mpg |
| Fuel Economy (US EPA) | 33 combined / 30 city / 40 highway mpg |
| CO₂ Emissions | 165 g/km |
| EPA Greenhouse Gas Score | 8 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,050 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 4 configurations for the 2015 Mazda 3 4-Door across 2 engines (2L 4-cyl, 2.5L 4-cyl). Combined fuel economy ranges from 29 to 33 mpg (US), or 35 to 40 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 |
|---|---|---|---|---|---|---|
| 2L 4-cyl | Automatic (S6) | Front-Wheel Drive | 40 | 33 (30/40) | 165 | $2,050 |
| 2L 4-cyl | Manual 6-spd | Front-Wheel Drive | 40 | 33 (29/39) | 168 | $2,050 |
| 2.5L 4-cyl | Automatic (S6) | Front-Wheel Drive | 37 | 31 (28/38) | 175 | $2,150 |
| 2.5L 4-cyl | Manual 6-spd | Front-Wheel Drive | 35 | 29 (25/36) | 191 | $2,300 |
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 96 cubic feet (about 2,718 litres) and luggage volume at 12 cubic feet (about 340 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 Mazda 3 4-Door
Running Costs: 2015 Mazda 3 4-Door
Covering around 8,000 miles a year in a 2015 Mazda 3 4-Door at 40 mpg combined, expect roughly 909 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,050 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 Mazda 3 4-Door Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists 4 safety recall campaigns that include the 2015 Mazda 3 4-Door (as of 6 October 2026). Most affected areas: Fuel system (2), Back over prevention (1), Parking brake (1). 1 campaign carried a “do not drive” or “park outside” advisory. A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Back over prevention — campaign 23V487000, reported 14 July 2023. Risk: A rearview camera that does not display properly can reduce the driver's rear view, increasing the risk of a crash or injury.
- Parking brake — campaign 17V393000, reported 22 June 2017. Risk: If the parking brake actuator shaft binds, the parking brake may not engage or disengage fully. If the parking brake does not engage properly, the vehicle may move unexpectedly if it is parked on a slope,…
- Fuel system — campaign 16V684000, reported 22 September 2016. Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
- Fuel system — campaign 15V621000, reported 2 October 2015. Risk: A fuel leak in the presence of an ignition source increases the risk of a fire. An engine that stalls increases the risk of a crash.
Owners have filed 129 complaints with NHTSA about the 2015 Mazda 3 4-Door. The most-reported areas are Service brakes (26), Unspecified (26), Electrical system (24). Complaints include 8 reported crashes, 2 reported fires, 9 reported injuries. That is well above the median of 74 complaints across the 11 Mazda 3 4-Door model years in our data.
Used-buyer checklist for the 2015 Mazda 3 4-Door
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Brakes (1 recall campaign · 26 owner complaints) — Brake firmly from speed and look for pulling, vibration or a soft pedal; ask for brake service history.
- Electrical system (24 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
- Fuel system (2 recall campaigns) — Ask whether any fuel-pump or fuel-system recalls were completed, and watch for hard starting or stalling.
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
Mazda models in our database average about 34 mpg (UK) combined on their most efficient configuration; the 2015 Mazda 3 4-Door's 40 mpg is 6 mpg above that make average. Its 165 g/km CO₂ figure is 33 g/km lower than the 198 g/km Mazda average.
Of the 13 Mazda 3 4-Door model years we cover, the 2015 is the most economical on its best configuration (40 mpg UK combined). See every Mazda 3 4-Door 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 Mazda 3 4-Door
Frequently Asked Questions
What engine does the 2015 Mazda 3 4-Door have?
EPA lists 2 engines for the 2015 Mazda 3 4-Door: 2L 4-cyl, 2.5L 4-cyl. The most fuel-efficient configuration pairs the 2L 4-cyl with a automatic (s6).
What is the fuel economy of the 2015 Mazda 3 4-Door?
The most efficient configuration returns around 40 mpg (UK) combined, or 33 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 35 to 40 mpg.
How much does the 2015 Mazda 3 4-Door cost to fuel per year?
The US EPA estimates about $2,050 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 Mazda 3 4-Door have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 5 stars for frontal crash protection.
Does the 2015 Mazda 3 4-Door have any recalls?
NHTSA lists 4 safety recall campaigns that include the 2015 Mazda 3 4-Door (as of 6 October 2026). Most affected areas: Fuel system (2), Back over prevention (1), Parking brake (1). 1 campaign carried a “do not drive” or “park outside” advisory. 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 Mazda 3 4-Door?
Among the 129 owner complaints filed with NHTSA, the most-reported areas are Service brakes (26 complaints), Unspecified (26 complaints), Electrical system (24 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 Mazda 3 4-Door have?
EPA measures interior passenger volume at 96 cubic feet (about 2,718 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.