The Mazda 3 III Hatchback, specifically the facelifted version introduced in 2017, represented a significant evolution of Mazda’s compact offering. This generation, internally designated as the BM series, aimed to blend sporty driving dynamics with refined interior appointments and modern technology. The 2.5-liter SkyActiv-G variant, producing 184 horsepower, was introduced for the 2018 model year and positioned as a premium offering within the hatchback lineup, bridging the gap between the base engine options and potential performance-focused trims. It was primarily sold in the North American market, where Mazda sought to establish itself as a driver-focused brand.
Technical Specifications
| Brand | Mazda |
| Model | 3 |
| Generation | 3 III Hatchback (BM, facelift 2017) |
| Type (Engine) | 2.5 SkyActiv-G (184 Hp) |
| Start of production | 2018 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.4 l/100 km (25 US mpg) |
| Fuel consumption (extra urban) | 7.1 l/100 km (33.1 US mpg) |
| Fuel consumption (combined) | 8.4 l/100 km (28 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 7.5 kg/Hp |
| Weight-to-torque ratio | 5.5 kg/Nm |
| Power | 184 Hp @ 5700 rpm |
| Power per litre | 74 Hp/l |
| Torque | 251 Nm @ 3250 rpm (185.13 lb.-ft. @ 3250 rpm) |
| Maximum engine speed | 6500 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | PY-VPS |
| Engine displacement | 2488 cm3 (151.83 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 100 mm (3.94 in.) |
| Compression ratio | 13:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC-VVT |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Kerb Weight | 1382 kg (3046.79 lbs.) |
| Trunk (boot) space – minimum | 572 l (20.2 cu. ft.) |
| Trunk (boot) space – maximum | 1334 l (47.11 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Length | 4460 mm (175.59 in.) |
| Width | 1796 mm (70.71 in.) |
| Height | 1455 mm (57.28 in.) |
| Wheelbase | 2700 mm (106.3 in.) |
| Front track | 1554 mm (61.18 in.) |
| Rear track | 1560 mm (61.42 in.) |
| Ride height (ground clearance) | 155 mm (6.1 in.) |
| Minimum turning circle | 10.6 m (34.78 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 6 |
| Gearbox type | Manual transmission |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link with stabilizer |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
| Tires size | 215/45 R18 |
| Wheel rims size | 7.0J x 18 |
INTRODUCTION
The 2018 Mazda 3 III Hatchback 2.5 SkyActiv-G (184 Hp) represented a significant step up in performance and refinement for the Mazda 3 line. Built on the BM platform, which underpinned the third generation of the 3, this variant was introduced as part of the 2017 facelift, bringing updated styling and enhanced features. It aimed to appeal to buyers seeking a more engaging driving experience than typically found in the compact segment, while still offering the practicality of a hatchback. This model year was a transitional one, with production limited to a single year before further updates were implemented.
Powertrain & Engine Architecture
At the heart of this Mazda 3 variant lies the PY-VPS 2.5-liter inline-four cylinder engine, a key component of Mazda’s SkyActiv technology suite. This engine is characterized by its high compression ratio of 13:1, achieved through a combination of optimized combustion chamber design, direct fuel injection, and variable valve timing (DOHC-VVT). The direct injection system precisely meters fuel into the cylinders, improving efficiency and reducing emissions. The engine produces 184 horsepower at 5700 rpm and 251 Nm (185.13 lb.-ft.) of torque at 3250 rpm. The six-speed manual transmission was standard, offering precise shifts and a direct connection to the engine. This transmission was chosen to complement the engine’s sporty character.
Driving Characteristics
The 2.5-liter engine and six-speed manual transmission combination provided a noticeably more spirited driving experience compared to the base 2.0-liter engine. The higher torque output allowed for confident acceleration in everyday driving situations, and the engine readily revved to its 6500 rpm redline. The manual gearbox, while not a short-throw design, offered a satisfyingly mechanical feel. Compared to automatic transmission equipped models, the manual provided greater driver control and a more engaging experience. While not a dedicated performance model like the Mazdaspeed3 of previous generations, the 2.5L offered a compelling balance of power and efficiency.
Equipment & Trim Levels
The 2.5-liter SkyActiv-G variant was typically offered in higher trim levels, such as the Grand Touring. Standard features included automatic climate control, a touchscreen infotainment system with Mazda Connect, Bluetooth connectivity, and a suite of safety features like ABS, stability control, and multiple airbags. Interior upholstery was typically cloth or leatherette, with available upgrades to full leather. Optional extras included a premium sound system, navigation, and advanced safety technologies like blind-spot monitoring and rear cross-traffic alert. The overall interior design emphasized a clean, minimalist aesthetic with a focus on driver ergonomics.
Chassis & Braking
The Mazda 3 III Hatchback utilized an independent suspension setup at all four corners. The front suspension employed a McPherson strut design with coil springs and an anti-roll bar, while the rear featured a multi-link setup with a stabilizer bar. This configuration provided a good balance of ride comfort and handling precision. Braking duties were handled by ventilated discs at the front and solid discs at the rear, providing adequate stopping power for the vehicle’s weight and performance. The electric power steering system offered a responsive and well-weighted feel.
Market Reception & Comparison
Critics generally praised the 2.5-liter Mazda 3 for its engaging driving dynamics and refined interior. The engine was lauded for its smooth power delivery and responsiveness. Fuel economy was considered competitive for its class, achieving around 28 US mpg in combined driving. Compared to other compact hatchbacks with similar power outputs, the Mazda 3 stood out for its focus on driver involvement and its upscale interior appointments. The 2.0-liter base engine was seen as adequate for everyday commuting, but lacked the punch of the 2.5-liter. The 2.5L offered a compelling alternative to competitors like the Honda Civic and Toyota Corolla, particularly for drivers who prioritized driving enjoyment.
Legacy
The 2.5-liter SkyActiv-G engine has proven to be a reliable and durable powertrain. While not without its minor issues (such as potential for oil consumption in some early examples), the engine generally enjoys a good reputation for longevity. On the used car market, the 2018 Mazda 3 2.5 SkyActiv-G Hatchback holds its value relatively well, particularly examples in good condition with low mileage. Its combination of sporty driving dynamics, modern features, and proven reliability makes it a desirable option for buyers seeking a well-rounded compact hatchback.
