2012 SUBARU IMPREZA WRX STI Owners Manual

Black plate (23,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 2
Specifications ..................................................... 12-2
Dimensions........................................................ 12-2
Engine ............................................................... 12-3
Electrical system ................................................ 12-3
Fuel ................................................................... 12-4
Lubricants. ......................................................... 12-5
Fluids ................................................................ 12-7
Engine coolant ................................................... 12-8 Tires
.................................................................. 12-9
Fuses and circuits ........................................... 12-10
Fuse panel located in the passenger
compartment ................................................. 12-10
Fuse panel located in the engine compartment ................................................. 12-12
Bulb chart......................................................... 12-14
Vehicle identification ....................................... 12-17
Specifications
12

Black plate (380,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
12-2
Specifications
SpecificationsThese specifications are subject to change without notice.& Dimensions
in (mm)
Item 4-door
5-door
Turbo models Turbo models
Except STI STIExcept STI STI
Overall length 180.3 (4,580)173.8 (4,415)
Overall width 70.7 (1,795)70.7 (1,795)
Overall height 58.1 (1,475)57.9 (1,470)58.1 (1,475) 57.9 (1,470)
Wheel base 103.3 (2,625)103.3 (2,625)
Tread Front 60.2 (1,530) 60.2 (1,530)
Rear 60.6 (1,540) 60.6 (1,540)
Ground clearance*
1
6.1 (155) 5.9 (150)6.1 (155) 5.9 (150)
*1: Measured with vehicle empty

Black plate (381,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& EngineEngine model
EJ255
(2.5 L, DOHC, turbo, except STI) EJ257
(2.5 L, DOHC, turbo, STI)
Engine type Horizontally opposed, liquid cooled 4 cylinder, 4-stroke gasoline engine
Displacement cc (cu-in) 2,457 (150)
Bore 6Stroke in (mm) 3.9 63.1 (99.5 679.0)
Compression ratio 8.4 : 1 8.2 : 1
Firing order 1
– 3–2– 4& Electrical systemBattery type and capacity (5HR)
MT 12V-48AH (55D23L)
Alternator Turbo models
12V-110A
Spark plugs Turbo models
SILFR6A (NGK)Specifications
12-3
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CONTINUED –
12

Black plate (382,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
12-4
Specifications
& Fuel
NOTEThe engine is designed to operate using unleaded gasoline.
Model Fuel requirement Fuel tank capacity
Except STI 91 AKI (95 RON) or higher*
1
16.9 US gal (64 liters, 14.1 Imp gal)
STI 93 AKI (98 RON) or higher*
2
*1: If unleaded gasoline with an octane rating of 91 AKI (95 RON) is not available, unleaded gasoline with an octane rating of 87 AKI (90 RON) or higher
may be temporarily used. For details, refer to
“Fuel ”F 7-3.
*2: If unleaded gasoline with an octane rating of 93 AKI (98 RON) is not available, unleaded gasoline with an octane rating of 91 AKI (95 RON) may be
used with no detriment to engine durability or driveability. For details, refer to “Fuel ”F 7-3.

Black plate (383,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Lubricants
NOTEEach quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
! Engine oil
For checking, adding and replacing procedure, or other details, refer to “Engine oil”F 11-8.
Oil grade SAE viscosity No. and
applicable temperature Engine oil capacity
API classification SM or SN
with the words
“
ENERGY CONSERVING ”or
“ RESOURCE CONSERVING ”or
ILSAC GF-4 or GF-5, which can be
identified with the ILSAC certification
mark (Starburst mark) 5W-30 synthetic
oil is the required oil for
optimum engine performance and pro-
tection. Conventional oil may be used if
synthetic oil is unavailable.
*: 10W-30, 10W-40, 5W-30 or 5W-40
conventional oil may be used if replen-
ishment is needed but should be changed
to 5W-30 synthetic oil at the next oil
change.
· When adding the oil from L to F level:
1.1 US qt (1.0 liter, 0.9
Imp qt)
· When changing the oil and oil filter:
- Except STI:
4.4 US qt (4.2 liters, 3.7
Imp qt)
- STI:
4.5 US qt (4.3 liters, 3.8
Imp qt) Specifications
12-5
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12

Black plate (384,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
12-6
Specifications
! Manual transmission and rear differential gear oil
Oil grade SAE viscosity No. and applicable temperature Applied part and model Oil capacity
API classification GL-5
Manual transmission 5-speed 3.7 US qt (3.5 liters, 3.1 Imp qt)
6-speed 4.3 US qt (4.1 liters, 3.6 Imp qt)
Rear differential STI 1.1 US qt (1.0 liter, 0.9 Imp qt)
Others
0.8 US qt (0.8 liter, 0.7 Imp qt)
For the checking procedures or other details, refer to “Manual transmission oil ”F 11-15 or “Rear differential gear oil ”F 11-16.

Black plate (385,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
& Fluids
NOTEEach quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
Fluid Fluid type Fluid capacity
Power steering fluid · SUBARU ATF
·
“Dexron III ”Type Automatic Transmission Fluid 0.7 US qt (0.7 liter, 0.6 Imp qt)
Brake fluid · Genuine SUBARU brake fluid
· FMVSS No. 116, fresh DOT 3 or DOT 4 brake fluid –
Clutch fluid –
For the checking procedures or other details, refer to “Power steering fluid ”F 11-17, “Brake fluid ”F 11-18 or “Clutch fluid ”F 11-19. Specifications
12-7
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12

Black plate (386,1)
北米Model "A1130BE-A" EDITED: 2011/ 6/ 7
12-8
Specifications
& Engine coolant
NOTEEach quantity indicated here is only a guideline. The necessary quantity for replacement may differ slightly depending on the
temperature and other factors.
Model Coolant capacity Coolant type
Turbo models Except STI
7.8 US qt (7.4 liters, 6.5 Imp qt)
SUBARU Super Coolant
STI 8.1 US qt (7.7 liters, 6.8 Imp qt)
For the checking, adding and replacing procedure, or other details, refer to “Cooling system ”F 11-11.