The Subaru Legacy IV 2.5i, produced from 2003 to 2005, represented a significant evolution in Subaru’s mid-size sedan offering. Positioned as a step up from the base 2.0L models, the 2.5i with its 165 horsepower engine and standard all-wheel drive (AWD) aimed to provide a blend of performance, practicality, and all-weather capability for the North American market, where Subaru had steadily gained a loyal following. This generation, internally designated as the BE/BH platform, continued Subaru’s commitment to its signature boxer engine and symmetrical AWD system. The 2.5i trim occupied a middle ground in the Legacy IV lineup, offering more power and features than the base models but remaining more accessible than the higher-spec Limited variants.
Technical Specifications
| Brand | Subaru |
| Model | Legacy |
| Generation | Legacy IV |
| Type (Engine) | 2.5i (165 Hp) AWD |
| Start of production | 2003 |
| End of production | 2005 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 11.4 l/100 km (20.6 US mpg) |
| Fuel consumption (extra urban) | 6.4 l/100 km (36.8 US mpg) |
| Fuel consumption (combined) | 8.2 l/100 km (28.7 US mpg) |
| CO2 emissions | 196 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 9.3 sec |
| Acceleration 0 – 62 mph | 9.3 sec |
| Acceleration 0 – 60 mph | 8.8 sec |
| Maximum speed | 214 km/h (132.97 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 8.2 kg/Hp |
| Weight-to-torque ratio | 6 kg/Nm |
| Power | 165 Hp @ 5600 rpm |
| Torque | 226 Nm @ 4400 rpm (166.69 lb.-ft. @ 4400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | EJ251, EJ259 |
| Engine displacement | 2457 cm3 (149.94 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Boxer |
| Cylinder Bore | 99.5 mm (3.92 in.) |
| Piston Stroke | 79 mm (3.11 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 4.2 l (4.44 US qt | 3.7 UK qt) |
| Coolant capacity | 6.8 l (7.19 US qt | 5.98 UK qt) |
| Kerb Weight | 1360 kg (2998.29 lbs.) |
| Max. weight | 1930 kg (4254.92 lbs.) |
| Max load | 570 kg (1256.63 lbs.) |
| Trunk (boot) space – minimum | 433 l (15.29 cu. ft.) |
| Fuel tank capacity | 64 l (16.91 US gal | 14.08 UK gal) |
| Max. roof load | 80 kg (176.37 lbs.) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 715 kg (1576.31 lbs.) |
| Length | 4665 mm (183.66 in.) |
| Width | 1730 mm (68.11 in.) |
| Height | 1425 mm (56.1 in.) |
| Wheelbase | 2670 mm (105.12 in.) |
| Front track | 1495 mm (58.86 in.) |
| Rear (Back) track | 1490 mm (58.66 in.) |
| Ride height (ground clearance) | 150 mm (5.91 in.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Spring Strut |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 205/55 R16 |
| Wheel rims size | 6.5J x 16 |
Powertrain & Engine Architecture
The heart of the 2.5i was the EJ251 or EJ259 2.5-liter naturally aspirated boxer engine. Subaru’s horizontally opposed “boxer” configuration, where pistons move horizontally rather than vertically, provides inherent balance, reducing vibrations and contributing to a smoother driving experience. The engine featured a single overhead camshaft (SOHC) design and multi-port fuel injection. The EJ251 was generally found in earlier models of this generation, while the EJ259 incorporated minor revisions for improved efficiency and durability. The engine produced 165 horsepower at 5600 rpm and 166.69 lb-ft of torque at 4400 rpm. This power was delivered to all four wheels through a standard five-speed manual transmission. While an automatic transmission was available, it was a four-speed unit, and often considered a detriment to the engine’s performance.
Driving Characteristics
The 2.5i offered a noticeable step up in performance compared to the base 2.0L Legacy. Acceleration to 60 mph took around 8.8 seconds, making it competitive with other mid-size sedans of the era. The symmetrical AWD system provided excellent traction in various weather conditions, a key selling point for Subaru. The manual transmission allowed for precise control, while the optional four-speed automatic, though convenient, resulted in some power loss and less engaging driving dynamics. The gear ratios were tuned for a balance of fuel economy and everyday drivability, rather than outright performance. The boxer engine’s low center of gravity contributed to stable handling, but the Legacy IV wasn’t particularly known for sporty handling characteristics.
Equipment & Trim Levels
The 2.5i trim typically included features such as air conditioning, power windows and locks, a CD player, and alloy wheels. Higher trim levels, like the Limited, added features like leather upholstery, a sunroof, and upgraded audio systems. The interior design was functional and straightforward, prioritizing practicality over luxury. Optional extras included a premium sound system, heated front seats, and side airbags. The dashboard layout was clean and easy to use, with logically placed controls.
Chassis & Braking
The Legacy IV utilized a MacPherson strut front suspension and a coil spring rear suspension. The suspension was tuned for a comfortable ride, absorbing bumps and imperfections in the road effectively. Braking duties were handled by ventilated discs up front and solid discs in the rear. Anti-lock brakes (ABS) were standard, enhancing safety. The chassis was relatively lightweight, contributing to the car’s agility. Stabilizer bars were included to reduce body roll during cornering, but the Legacy IV wasn’t designed to be a performance car.
Market Reception & Comparison
The Subaru Legacy IV 2.5i was generally well-received by automotive critics. It was praised for its standard AWD, comfortable ride, and reliable engine. However, the optional four-speed automatic transmission was often criticized for its sluggishness. Compared to other mid-size sedans like the Honda Accord and Toyota Camry, the Legacy offered a unique combination of features, particularly its AWD system. Fuel economy was respectable, averaging around 28.7 US mpg in combined driving. Reliability was generally good, although some owners reported issues with the head gaskets, a common problem with Subaru engines of this era.
Legacy
The Subaru Legacy IV 2.5i remains a relatively affordable and practical used car option today. The EJ25 engine, while known for potential head gasket issues, is generally durable with proper maintenance. The AWD system continues to be a valuable asset in regions with inclement weather. Parts availability is good, and the Legacy IV is relatively easy to maintain. While not a particularly exciting car to drive, the 2.5i offers a comfortable, reliable, and capable transportation solution for those seeking a mid-size sedan with all-weather capability. Its enduring popularity in the used car market is a testament to its overall quality and practicality.
