Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 1
SPC-2
Impreza
SPECIFICATIONS
1. Impreza
A: DIMENSION
*1: Model with sunroof
B: ENGINE
C: ELECTRICAL
Model
4 door
5 door
WRX-S, WRX
STI-S, SE
WRX
STI, SE
Overall length
mm (in)
4,580 (180.3)
4,415 (173.8)
Overall width
mm (in)
1,795 (70.7)
1,795 (70.7)
Overall height (at C.W.)
mm (in)
1,475 (58.1)
1,470 (57.9)
1,475 (58.1)
1,470 (57.9)
Compartment
Length
mm (in)
1,985 (78.1)
1,985 (78.1)
Width
mm (in)
1,475 (58.1)
1,475 (58.1)
Height
mm (in)
1,200 (47.2), 1,170 (46.1)
*1
1,200 (47.2), 1,170 (46.1)
*1
Wheelbase
mm (in)
2,625 (103.3)
2,625 (103.3)
Tread
Front
mm (in)
1,530 (60.2)
1,530 (60.2)
Rear
mm (in)
1,540 (60.6)
1,540 (60.6)
Minimum road clearance
mm (in)
155 (6.1)
150 (5.9)
155 (6.1)
150 (5.9)
Model
2.5 L turbo
(WRX-S, WRX model)
2.5 L high power turbo
(STI-S, STI, SE model)
Engine type
Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline engine
Valve arrangement
DOHC
Bore × stroke
mm (in)
99.5 × 79.0 (3.92 × 3.11)
Displacement
cm
3
(cu in)
2,457 (149.94)
Compression ratio
8.4
8.2
Ignition order
1 — 3 — 2 — 4
Idle speed
rpm
700±100
Maximum output
kW (HP)/rpm
198 (265)/6,000
227 (305)/6,000
Maximum torque
N·m (kgf-m, ft-lb)/rpm
330 (33.7, 244)/4,000
394 (40.2, 290)/4,000
Model
2.5 L turbo
(WRX-S, WRX model)
2.5 L high power turbo
(STI-S, STI, SE model)
Ignition timing (at idling)
BTDC
12°±10°
15°±10°
Spark plug
Type and manufacturer
NGK: SILFR6A
Generator
12 V — 110 A
Battery
Type and capacity (5HR)
12 V — 48 AH (55D23L)
CCA
390A
SPC-3
Impreza
SPECIFICATIONS
D: TRANSMISSION
6MT: 6-forward speeds and 1-reverse with synchromesh
5MT: 5-forward speeds and 1-reverse with synchromesh
DSPD: Dry Single Plate Diaphragm
E: STEERING
F: SUSPENSION
G: BRAKE
H: TIRE
Transmission type
6MT
5MT
Clutch type
DSPD
Gear ratio
1st
3.636
3.166
2nd
2.235
1.882
3rd
1.521
1.296
4th
1.137
0.972
5th
0.971
0.738
6th
0.756
—
Reverse
3.545
3.333
Reduction gear (front)
Final reduction
Type of gear
Hypoid
Gear ratio
3.900
Reduction gear (rear)
Transfer reduction
Type of gear
Helical
Gear ratio
1.103
1.000
Final reduction
Type of gear
Hypoid
Gear ratio
3.545
3.900
Type
Rack and pinion
Turns, lock to lock
2.8
Minimum turning
diameter
m (ft)
Curb to curb
11.0 (36.1)
Wall to wall
11.8 (38.7)
Front
Macpherson strut type suspension
Rear
Double-wishbone type suspension
Model
WRX-S, WRX
STI-S, STI, SE
Service brake system
Dual circuit hydraulic with vacuum suspended power unit
Front
Ventilated disc brake
Rear
Disc brake
Ventilated disc brake
Parking brake
Mechanical on rear brakes
Rim size
17 × 8J
18 × 8 1/2J
Tire size
235/45R17 94W
245/40R18 93W
Type
Tubeless, steel belted radial
SPC-4
Impreza
SPECIFICATIONS
I: CAPACITY
J: WEIGHT
Model
WRX-S, WRX
STI-S, STI, SE
Fuel tank
L (US gal, Imp gal)
64 (16.9, 14.1)
Engine oil
Total capacity (at overhaul)
L (US qt, Imp qt)
5.0 (5.3, 4.4)
When replacing engine oil and oil filter
L (US qt, Imp qt)
4.2 (4.4, 3.7)
4.3 (4.5, 3.8)
When replacing engine oil only
L (US qt, Imp qt)
4.0 (4.2, 3.5)
Transmission gear oil
L (US qt, Imp qt)
3.5 (3.7, 3.1)
4.1 (4.3, 3.6)
Rear differential gear oil
L (US qt, Imp qt)
0.8 (0.8, 0.7)
1.0 (1.1, 0.9)
Power steering fluid
L (US qt, Imp qt)
0.7 (0.7, 0.6)
Engine coolant
L (US qt, Imp qt)
7.4 (7.8, 6.5)
7.7 (8.1, 6.8)
Model
4 door
2.5 L DOHC turbo
WRX
WRX-S
5MT
5MT
OP code
U4
C0
C0
C4
U4
U4
U4
U4
U4
TX
TR
CH
4H
TX
4R
5R
OH
QH
Curb weight
(C.W.)
Total
kg (lb)
1,455
(3,208)
1,455
(3,208)
1,475
(3,252)
1,475
(3,252)
1,455
(3,208)
1,470
(3,241)
1,470
(3,241)
1,475
(3,252)
1,475
(3,252)
Front
kg (lb)
830
(1,830)
830
(1,830)
840
(1,852)
840
(1,852)
830
(1,830)
835
(1,841)
835
(1,841)
840
(1,852)
840
(1,852)
Rear
kg (lb)
625
(1,378)
625
(1,378)
635
(1,400)
635
(1,400)
625
(1,378)
635
(1,400)
635
(1,400)
635
(1,400)
635
(1,400)
Gross vehicle weight (G.V.W.)
kg (lb)
1,990
(4,387)
1,990
(4,387)
1,990
(4,387)
1,990
(4,387)
1,990
(4,387)
1,990
(4,387)
1,990
(4,387)
1,990
(4,387)
1,990
(4,387)
Maximum permissi-
ble axle weight
(G.A.W.)
Front
kg (lb)
1,020
(2,249)
1,020
(2,249)
1,020
(2,249)
1,020
(2,249)
1,020
(2,249)
1,020
(2,249)
1,020
(2,249)
1,020
(2,249)
1,020
(2,249)
Rear
kg (lb)
1,030
(2,271)
1,030
(2,271)
1,030
(2,271)
1,030
(2,271)
1,030
(2,271)
1,030
(2,271)
1,030
(2,271)
1,030
(2,271)
1,030
(2,271)
Option
Aluminum wheel 18 in
(BBS)
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Navigation
—
—
—
—
—
—
—
Sunroof
—
—
—
HID
—
—
—
—
—
—
—
Front fog light
—
—
—
Genuine leather seat
—
—
—
—
—
Seat heater
—
—
Cold weather pack-
age
—
—
Satellite tuner
—
—
—
—
—
—
—
—
Side airbag
Curtain airbag
SPC-5
Impreza
SPECIFICATIONS
Model
4 door
2.5 L DOHC high power turbo
STI
STI-S
SE
6MT
6MT
6MT
OP code
C0
C0
C4
U4
U4
U4
U4
U4
C0
U4
PH
OR
SH
3R
MR
SH
UH
VR
TR
TX
Curb weight
(C.W.)
Total
kg (lb)
1,540
(3,395)
1,550
(3,417)
1,550
(3,417)
1,535
(3,384)
1,535
(3,384)
1,550
(3,417)
1,550
(3,417)
1,535
(3,384)
1,535
(3,384)
1,535
(3,384)
Front
kg (lb)
890
(1,962)
890
(1,962)
890
(1,962)
885
(1,951)
885
(1,951)
890
(1,962)
890
(1,962)
885
(1,951)
885
(1,951)
885
(1,951)
Rear
kg (lb)
650
(1,433)
660
(1,455)
660
(1,455)
650
(1,433)
650
(1,433)
660
(1,455)
660
(1,455)
650
(1,433)
650
(1,433)
650
(1,433)
Gross vehicle weight (G.V.W.)
kg (lb)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
2,030
(4,475)
Maximum permissi-
ble axle weight
(G.A.W.)
Front
kg (lb)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
1,050
(2,315)
Rear
kg (lb)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
1,040
(2,293)
Option
Aluminum wheel 18 in
(BBS)
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—
—
—
—
—
Navigation
—
—
—
—
—
—
—
Sunroof
—
—
—
—
—
HID
—
—
Front fog light
—
—
—
—
Genuine leather seat
—
—
—
—
—
—
Seat heater
—
Cold weather pack-
age
—
Satellite tuner
—
—
—
—
—
—
—
—
—
Side airbag
Curtain airbag
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