The document provides instructions for how to use service manuals. It explains that each section covers components and includes specifications, maintenance, and diagnostic information. Illustrations show parts with identification numbers and relevant repair information. Diagnosis sections use tables for troubleshooting. Measurements are in SI units with metric and imperial conversions. Common terminology is defined. Cautions are provided about fasteners, static electricity, batteries, genuine parts, vehicle protection, and lift safety.

1. HU-2
How to Use This Manuals
HOW TO USE THIS MANUALS
1. How to Use This Manuals
A: HOW TO USE THIS MANUALS
1. STRUCTURE
Each section consists of SCT that are broken down
into SC that are divided into sections for each com-
ponent. The specification, maintenance and other
information for the components are included, and
the diagnostic information has also been added
where necessary.
2. CONTENTS
The first page has an index with tabs.

2. HU-3
How to Use This Manuals
HOW TO USE THIS MANUALS
3. COMPONENT
Illustrations are provided for each component. The information necessary for repair work (tightening torque,
grease up points, etc.) is described on these illustrations. Information is described using symbol.
To order parts, refer to parts catalogue.
Example:
HU-00017
(14)
(9)
(8)
(7)
(6)
(10)
(4) (10)
(22)
(11)
(19)
(17)
(15)
(13)
(12)
(18)
(16)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(11)
(10)
(9)
(12)
(13)
(19)
(18)
(20)
(17)
(16)
(24)
(10)
(25)
(5)
(4)
(4)
(4)
(3)
(3)
(3)
(2)
(1)
(21)
(15)
(23)
T7
T2
T2
T2
T2
T2
T2
T4
T5
T5
T8
T6
T6
T6
T11
T10
T1
T1
T3
T3
T3
T1
T9
T4
T5
T5
T3
T4
T3
T2
T4
T2
T1
T3
(20)
(21)
(23)
(22)
(10)
(24)
(25)
(26)
(35)
(34)
(27)
(14)
(28)
(29)
(31)
(32)
(37)
(30)
(33)
(36)
T3
T2
T1 ....
,
: Selective part
: Replacement part
: Sealing point
: Should be lubricated with oil.
: Should be lubricated with grease.
: Tightening torque

3. HU-4
How to Use This Manuals
HOW TO USE THIS MANUALS
4. SPECIFICATION
If necessary, specifications are also included.
5. INSPECTION
Inspections to be carried out before and after maintenance are included.
6. MAINTENANCE
• Maintenance instructions for serviceable parts describe work area and detailed step with illustration. It also
describes the use of special tool, tightening torque, caution for each procedure.
• If many serviceable parts are included in one service procedure, appropriate reference is provided for each
parts.
Example:
(A) Component (D) Cautions (G) Tightening torque
(B) Process (E) Tool number of special tool (H) Illustration
(C) Reference (F) Name of special tool
HU-00020
1) Remove the manual transmission assembly
from vehicie. <Ref. to MT-33, REMOVAL, Manual
Transmission Assembly.>
15.Main Shaft Assembly for Sin-
gle-Range
A: REMOVAL
11) Tighten the lock nuts to the specified torque us-
ing ST1 and ST2.
NOTE:
Secure the lock nuts in two places after tightening.
ST1 498937000 TRANSMISSION HOLDER
(A)
(B)
(C)
(D)
(G)
(E) (F)
(H)
Tightening torque:
118 N m (12.0 kgf-m, 86.8 ft-lb)
ST1
ST2
ST2 499987003 SOCKET WRENCH (35)

4. HU-5
How to Use This Manuals
HOW TO USE THIS MANUALS
7. DIAGNOSIS
Tables showing a step-by-step process make it easy to conduct diagnosis.
8. SI UNITS
Measurements in these manuals are according to the SI units. Metric and yard/pound measurements are
also included.
Example:
Tightening torque:
44 N·m (4.5 kgf-m, 33 ft-lb)
9. EXPLANATION OF TERMINOLOGY
• List
2ndr : Secondary ISC : Idle Speed Control
AAI : Air Assist Injection LED : Light Emitting Diode
A/B : Airbag LH : LH (Left Hand)
ABS : Anti-lock Brake System LSD : Limited Slip Differential
A/C : Air Conditioner M/B : Main Fuse & Relay Box
ACC : Accessory MD : Mini Disc
A/F : Air Fuel Ratio MFI : Multi Point Injection
ALT : Generator MP-T : Multi-Plate Transfer
ASSY : Assembly MT : Manual Transmission
AVCS : Active Valve Control System NA : Natural Aspiration
AWD : All Wheel Drive NC : Normal Close (Relay)
BATT : Battery NO : Normal Open (Relay)
CAN : Controller Area Network OP : Option Parts
CD-R/RW : CD Recordable/Rewritable OBD : On-Board Diagnosis
COMPL : Complete P/S : Power Steering
CPU : Central Processing Unit P/W : Power Window
DCCD : Driver’s Control Center Defferential PCD : Pitch Circle Diameter
DOHC : Double Overhead Camshaft PCV : Positive Crankcase Ventilation
DTC : Diagnosis Trouble Code PID : Parameter Identification
DOJ : Double Offset Joint Pr : Primary
DVD : Digital Versatile Disc or Digital Video Disc RAM : Random Access Memory
EBD : Electric Brake Distribution RH : RH (Right Hand)
ECM : Engine Control Module ROM : Read Only Memory
EGI : Electronic Gasoline Injection rpm : Revolution Per Minute
E/G : Engine SOHC : Single Overhead Camshaft
EGR : Exhaust Gas Recirculation SRS : Supplemental Restraint System
ELR : Emergency Locking Retractor SSM : Subaru Select Monitor
EX : Exhaust ST : Special Tool
ETC : Electronic Throttle Control STD : Standard
F/B : Fuse & Joint Box SW : Switch
FL : Fusible Link TCM : Transmission control module
FWD : Front Wheel Drive TGV : Tumble Generator Valve
GPS : Global Positioning System T/M : Transmission
HID : High-Intensity Discharge UV : Ultraviolet
H/U : Hydraulic Unit VDC : Vehicle Dynamics Control
IG : Ignition V.I.N. : Vehicle Identification Number
IN : Intake VSV : Vacuum Switching Valve
INT : Intermittent VTD : Variable Torque Distribution
I/O : Input / Output W/H : Wiring Harness

5. ID-2
Identification
IDENTIFICATION
1. Identification
A: IDENTIFICATION
1. IDENTIFICATION NUMBER & LABEL LOCATIONS
The V.I.N. (Vehicle Identification Numbers) is used to classify the vehicle.
• POSITIONING OF THE LABEL FOR IDENTIFICATION
(1) Vehicle identification number
(V.I.N.)
(3) Tire inflation pressure label (5) Model number label (Apply on the
right side of center pillar outer)
(4) MVSS label (Apply on the left side
of center pillar outer)
(2) Emission control label
(1)
(2)
(1)
ID-00224
(3)
(4),(5)

6. ID-3
Identification
IDENTIFICATION
• ENGINE
• MANUAL TRANSMISSION
• REAR DIFFERENTIAL
• Model number label
• MVSS label
2. MEANING OF V.I.N.
The meaning of the V.I.N. is as follows:
]JF1GR896X8L800001[
The large parentheses (][) located in front and back are stop marks.
(1) Engine serial number
(2) Engine type (crankcase upper side)
(1) Transmission serial number
(2) MT type label
ID-00059
(2)
(1)
ID-00137
(1)
(2)
(1) Identification (white paint)
(1)
DI-00502
ID-00223
ID-00252
Digits Code Meaning Details
1 — 3 JF1 Manufacturer body area JF1: Passenger car, FHI made
4 G Car line G: IMPREZA
5 R Body type R: 5 door wide body
6 8 Displacement 8: 2.5 L AWD High power turbo
7 9 Grade 9: WRX STI
8 6 Restraint 6: Manual belts, dual airbag, side airbag
9 X Check digit 0 — 9&X
10 8 Model year 8: 2008MY
11 L Transmission type L: Full-time AWD 6MT
12 — 17 800001 Serial number 800001 —

7. ID-4
Identification
IDENTIFICATION
3. MODEL NUMBER LABEL
The model number label indicates: the applied model, the option code, the trim code, the engine type, the
transmission type, and the exterior color code. This information is helpful when placing orders for parts.
GRFAYEH
The engine and transmission type are as follows.
ENGINE
EJ257BG1LB
TRANSMISSION (MT)
TY856UW1MA
REAR DIFFERENTIAL
H3
Digits Code Meaning Details
1 G Series G: IMPREZA
2 R Body type R: 5 door wide body
3 F
Engine displacement
Drive system
Suspension system
F: 2.5 L AWD High power turbo
4 A Model year A: 2008MY
5 Y Destination Y: U.S., Canada
6 E Grade E: WRX STI
7 H
Transmission, fuel feed
system
H: MFI High power turbo 6MT AWD
Digits Code Meaning Details
1 and 2 EJ Engine type EJ: 4 cylinder
3 and 4 25 Displacement 25: 2.5 L
5 7 Fuel feed system 7: MFI High power turbo
6 B Exhaust regulations B: U.S. (FED, CAL)
7 G Transmission G: 6MT
8 1 Minor change 1: 1 is stamped on the engine.
9 — 10 LB Detailed specifications Used when ordering parts. See the parts catalog for details.
Digits Code Meaning Details
1 T Transmission T: Transmission
2 Y Transmission system Y: Full-time AWD MT center differential
3 and 4 85 Classification 85: 6MT
5 6 Series 6: 6MT
6 U
Transmission specifica-
tions
U: Center differential full-time AWD 6MT
7 W Mounted engine W: 925 DOHC turbo
8 1 Minor change 1: Start after 2 o 3
9 M Detailed specifications Specification difference over the transmission
10 A Detailed specifications Specification difference over the engine and body
Identification Reduction gear ratio LSD
H3 3.545 Torsen

8. ID-5
Identification
IDENTIFICATION
Option code
U4JP
• 3rd digit
• 4th digit
Digits Code Meaning Details
1 — 2 U4 Destination
C4: Mexico
CO: Canada
U4: U.S. (FED, CAL)
3 — 4 JP
Main optional parts of
the vehicle
See the following table.
OP code A B D E G H J K P Q
18 in Tire & Aluminum wheel (casting) — — — — — — — —
18 in Tire & Aluminum wheel (BBS) Silver — — — — — —
18 in Tire & Aluminum wheel (BBS) Gold — — — — — —
Navigation — — — — —
Satellite tuner — — — — — —
OP code D P T
Cold weather package —
Front fog light —
Seat heater —

9. NT-2
Note
NOTE
1. Note
A: NOTE
This information will improve the efficiency of main-
tenance and assure that the finished work is of a
good quality.
1. FASTENERS NOTICE
Fasteners are used to prevent the parts from dam-
age, dislocation and play due to looseness. Fasten-
ers must be tightened to the specified torque.
Do not apply paint, lubricant, rust retardant or other
substance to the surface around bolts, nuts, etc.
Doing so will make it difficult to obtain the correct
torque and result in looseness and other problem.
2. STATIC ELECTRICITY DAMAGE
Do not touch the control modules, connectors, logic
boards and other such parts when there is a risk of
static electricity. Always use a static electricity pre-
vention cord or touch grounded metal for the elimi-
nation of static electricity before conducting work.
3. BATTERY
When removing the battery cables, always be sure
to turn the ignition switch to OFF to prevent electri-
cal damage to the control module from overcurrent.
4. SERVICE PARTS
Use genuine parts for maximum performance and
maintenance when conducting repairs. Subaru/FHI
will not be responsible for poor performance result-
ing from the use of parts except for genuine parts.
5. PROTECTING VEHICLE UNDER
MAINTENANCE
Make sure to attach the fender cover, seat covers,
etc. before work.
6. ENSURING SECURITY DURING WORK
When working in a group of two or more, perform
the work with calling each other to ensure mutual
safety.
7. LIFT AND JACK
When using a lift or shop jack to raise a vehicle or
using rigid rack to support a vehicle, always follow
instructions concerning jack-up points and weight
limits to prevent the vehicle from falling, which
could result in injury. Be especially careful that the
vehicle is balanced before raising it. Be sure to set
the wheel stoppers when jacking-up only the front
or rear side of the vehicle.
CAUTION:
When the side sill interferes with the lift arm, a
grooveless attachment can be used. In this
case, perform the operation carefully because
the dislocation from the side sill flange may oc-
cur.
NOTE:
• When using a lift, follow its operation manual be-
fore work.
• When the side sill cover contacts the lift arm, use
a lift attachment.
• Do not work or leave unattended while the vehi-
cle is supported with jack, support it with rigid
racks.
• Be sure to use the rigid racks with rubber at-
tached to cradle to support the vehicle.
• When using a plate lift, use a rubber attachment.
(A) 80 mm (3.1 in) or more
(B) 100 — 150 mm (3.94 — 5.91 in)
(C) 120 — 190 mm (4.72 — 7.48 in)
(A)
(B)
(C)
NT-00070

10. NT-3
Note
NOTE
• Do not use the plate lift whose attachment does not reach the supporting locations.
Supporting locations
Pantograph jack
NT-00264
NT-00265

11. NT-4
Note
NOTE
Lift
Rigid racks
(A) Attachment
NT-00266
(A)
(A) Attachment
(A)
NT-00267

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13. NT-5
Note
NOTE
Plate lift
Garage jack
(A) Attachment
(A) Front (B) Rear
(1) Front crossmember (2) Rear differential
NT-00268
(A)
(A) (A)
(1)
(2)
(A)
(B)
NT-00210

14. NT-6
Note
NOTE
8. TIE-DOWNS
The tie-down hooks are used when transporting vehicles and when using the chassis dynamo. Attach tie-
down only to the specified locations on the vehicle.
• TIE-DOWN LOCATION
(1) Hook for tie-down
NT-00218
(1)
(1) (1)