FB25D Subaru FB25D

Модульний 4-циліндровий двигун з атмосферним впорском, відомий своєю надійністю та економічністю.

Brand: Subaru Type: Petrol Configuration: Flat-4 Production Years: 2010 - теперішній час Production: Gunma, Japan
27 Brand engines
3 Modifications

Technical Specifications

Engine Displacement 2.4 L (2,498 cc)
Configuration Flat-4
Number of Cylinders 4
Valves per Cylinder 4
Power 173 - 175 л.с.
Torque 235 - 250 Н*м
Cylinder Bore 90.00 mm
Piston Stroke 90.00 mm
Compression Ratio 10.5:1
Firing Order 1-3-2-4
Fuel System Multi-point Fuel Injection
Aspiration Naturally Aspirated
Intercooler No
Maximum RPM 6,000 rpm
Max Torque RPM 4,000 rpm
Valve Train DOHC
Timing Drive Chain
Timing Chain Replacement 200000 or as needed
Block Material Aluminum
Head Material Aluminum
Engine Weight 150 kg
Dimensions (L×W×H) 600 × 600 × 600 mm
Lubrication System Wet sump
Cooling System Liquid cooling

Additional Information

Engine Family Subaru FB engine family
Manufacturing Plant Gunma, Japan
Predecessor EJ25

Maintenance

Engine Oil Capacity 5.5 L (with filter: 6 L)
Recommended Viscosity 0W-20, 5W-30
Oil Standard API SN, ILSAC GF-5
Recommended Brands Subaru Genuine Oil, Mobil 1, Castrol Edge
Oil Change Interval 10 000 km or 6 mo
Oil Filter 15208AA12A
Air Filter 16546AA12A
Replace every 30 000 km
Cabin Filter 72880AJ00A
Spark Plugs Type: Iridium
Part number: 22401AA550
Gap: 1.1 mm
Quantity: 4 pcs
Replace every 60 000 km
Coolant Capacity 8 L
Coolant Type Subaru Long Life Coolant (Subaru Coolant)
Coolant Change Interval 240 000 km
Thermostat Opening Temperature 88°C
Operating Temperature 90°C
Max Operating Temperature 120°C
Critical Temperature 130°C
Annual Maintenance Cost 500-800 USD

Reliability

Reliability rating: 8/10

Expected lifespan: 300 000 km

Common problems

Problem Severity Mileage Repair cost
Oil consumption issues Medium 100000-150000 km $800-1500
Timing chain tensioner failure Medium 120000-180000 km $1000-2000

Known defects

  • Some early models had issues with valve cover gaskets
  • Potential for head gasket leaks

Warranty extensions

  • Subaru offers extended warranty options for certain models

Tuning potential

Tuning potential: Medium | Max. safe power: 300 hp

Stage Power Torque Method Cost
Stage 1 200 hp 280 Nm ECU remap only
Reliability impact: Minimal 		$600
Stage 2 230 hp 320 Nm -
Required: Cold air intake, ECU remap
Reliability impact: Low 		$1500
Stage 3 270 hp 370 Nm -
Required: Turbocharger kit, ECU remap
Reliability impact: Medium 		$4000

Popular modifications

  • ECU tune
  • Cold air intake
  • Exhaust system upgrade

Tuning limitations

  • Stock internals limit power potential
  • Turbocharging requires significant modifications

Детальні технічні характеристики

3
модифікацій
182–185
к.с.

Спільні характеристики

Back suspension Independent, spring
Boost type none
Capacity 2498 cm3
Compression ratio 12
Country Japan
Cylinder layout opposed
Engine placement Front, longitudinal
Engine type Gasoline
Front brakes ventilated disc
Front suspension Independent, spring
Fuel 95
Number of cylinders 4
Number of seater 5
Rear brakes ventilated disc
Timing belt DOHC
Valves per cylinder 4

Модифікації двигуна

2.5 CVT 4WD (185 hp)
Привід All wheel drive (AWD) КПП Continuously variable transmission (CVT) Impreza 6 2023–2026
185 hp
engine
Cylinder bore 94.0 mm
Engine code FB25
Engine model FB25D
Engine power 185 hp
Fuel tank capacity 63 l
Injection type direct injection (direct)
Max power (kW) 136 kW
Max power at RPM 5800 RPM
Max trunk capacity 1585 l
Maximum torque 242 N*m
Min trunk capacity 577 l
Stroke cycle 90.0 mm
Turnover of maximum torque 3700 RPM
fuel
City driving fuel consumption per 100 km 9.0 l
Highway driving fuel consumption per 100 km 7.1 l
Mixed driving fuel consumption per 100 km 8.1 l
transmission
Drive wheels All wheel drive (AWD)
Gearbox type Continuously variable transmission (CVT)
dimensions
Back track width 1545 mm
Clearance 130 mm
Curb weight 1487 kg
Front track width 1540 mm
Height 1450 mm
Length 4475 mm
Number of doors 5
Wheelbase 2670 mm
Width 1780 mm
suspension
Steering wheel position Left/Right
Wheel size 225/40 R18
other
Body type Hatchback
Car class C
2.5 CVT 4WD (182 hp)
Привід All wheel drive (AWD) КПП Continuously variable transmission (CVT) Crosstrek 3 2022–2026
182 hp
engine
Cylinder bore 94 mm
Engine code FB25D
Engine power 182 hp
Fuel tank capacity 63 l
Injection type direct injection (direct)
Max power (kW) 136 kW
Max power at RPM 5800 RPM
Max trunk capacity 1549 l
Maximum torque 242 N*m
Min trunk capacity 563 l
Stroke cycle 90 mm
Turnover of maximum torque 3700 RPM
performance
Acceleration (0-100 km/h) 9.3 s
Max speed 208 km/h
fuel
City driving fuel consumption per 100 km 9.0 l
Emission standards Euro 6
Highway driving fuel consumption per 100 km 7.1 l
Mixed driving fuel consumption per 100 km 8.1 l
transmission
Drive wheels All wheel drive (AWD)
Gearbox type Continuously variable transmission (CVT)
dimensions
Back track width 1570 mm
Clearance 220 mm
Curb weight 1511 kg
Front track width 1560 mm
Full weight 1885 kg
Height 1575 mm
Length 4480 mm
Number of doors 5
Wheelbase 2670 mm
Width 1800 mm
suspension
Steering wheel position Left/Right
Wheel size 225/55/R18
other
Body type Crossover
Car class C
2.5 CVT AWD (182 hp)
Привід All wheel drive (AWD) КПП Continuously variable transmission (CVT) Legacy 5 2009–2012
182 hp
engine
Cylinder bore 94.0 mm
Engine code FB25D
Engine power 182 hp
Fuel tank capacity 70 l
Injection type combined injection (direct-distributed)
Max power (kW) 136 kW
Max power at RPM 5800 RPM
Maximum torque 239 N*m
Min trunk capacity 428 l
Stroke cycle 90.0 mm
Turnover of maximum torque 4400 RPM
fuel
City driving fuel consumption per 100 km 8.7 l
Highway driving fuel consumption per 100 km 6.7 l
Mixed driving fuel consumption per 100 km 7.8 l
transmission
Drive wheels All wheel drive (AWD)
Gearbox type Continuously variable transmission (CVT)
dimensions
Back track width 1610 mm
Clearance 150 mm
Curb weight 1583 kg
Front track width 1580 mm
Height 1500 mm
Length 4855 mm
Number of doors 4
Wheelbase 2750 mm
Width 1840 mm
suspension
Steering wheel position Left
Wheel size 225/55 R17, 225/50 R18
other
Body type Sedan
Car class D
Flow calculation method EPA

Cars with the FB25D engine

This engine was fitted to 2 models

Photo Brand Model Generation Production years
No photo
 Subaru Outback Outback V (BS) 2015 - 2021
No photo
 Subaru E-Outback E-Outback 2026 - 2026

All modifications (3)

Vehicle Generation Modification Power Gearbox Drive
Subaru Outback Outback V (BS) 2.4 Turbo 260 л.с. CVT 4x4 260 hp CVT 4x4
Subaru Outback Outback V (BS) 2.4 Turbo 260 л.с. 6-МКП 4x4 260 hp 6-МКП 4x4
Subaru E-Outback E-Outback E-Boxer 2.0 150 л.с. CVT 4x4 150 hp CVT 4x4

Interesting Facts

  • FB25D is part of Subaru's new generation of engines with improved fuel efficiency.
  • Features a lightweight design and lower center of gravity.
  • Utilizes Subaru's signature Boxer engine layout.

Applications

Total produced: загальна кількість випущених двигунів

Vehicle Generation Years Power Markets
Subaru Forester SJ 2012-2018 175hp Global
Subaru Outback BS 2015-2019 175hp Global

Compatible transmissions: 6-speed Manual, CVT

Drive types: AWD

Fuel Economy

Fuel Type Petrol 95
Octane Rating Minimum: 95 | Recommended: 98
Consumption (City) 10 L/100km
Consumption (Highway) 7.5 L/100km
Consumption (Combined) 8.5 L/100km
Real Consumption 9 L/100km
Fuel Tank Capacity 60 L
Range 705 km
Cost per 100 km 10-12 USD

Emissions Standards

Emission Standard Euro 5
CO₂ Emissions 180 g/km
Particulate Filter (DPF) Absent
AdBlue Not Required

Awards and Recognition

  • Best Engine (2012) — Up to 2.5L

Comparison with competitors

Engine Brand Displacement Power Torque
K24Z3 Honda 2,356 cc 190 hp 245 Nm
2.5L I4 Toyota 2,494 cc 203 hp 250 Nm

Pros

  • Lower center of gravity improves handling.
  • Good balance of power and fuel efficiency.
  • Durable and reliable design.

Cons

  • Oil consumption issues in some models.
  • Less power compared to turbocharged competitors.