A23-037

Service Bulletin
July 6, 2023
23-037
Version 1
2022–23 Civic EPS Gearbox Replacement
AFFECTED VEHICLES
Year
Model
Trim
VIN Range
2022
CIVIC
ALL
ALL
2023
CIVIC
ALL Except Type R
ALL
SYMPTOM
Steering effort complaint while driving at moderate or highway speeds, with possible complaint of noise at slow speeds,
and no MIL illuminated or DTC stored.
POSSIBLE CAUSE
There is a possible steering gearbox malfunction.
CORRECTIVE ACTION
Remove the EPS gearbox assembly and replace with a new gearbox. Keep the original EPS motor/control unit with the
new gearbox.
PARTS INFORMATION
Part Name
Part Number
Quantity
Gearbox (4-door Si)
53640-T22-305
1
Gearbox (4-door, 5-door, LX, EX, EX-T)
53640-T21-306
1
Gearbox (4-door, 5-door, Touring, Sport)
53640-T21-305
1
Flange Bolt (12X75)
90161-SX8-T00
4
Washer Bolt (14X85)
90179-T20-A01
4
Flange Bolt (12X30)
90174-T20-A01
2
Flange Bolt (10X20)
90165-THR-A00
4
Washer Bolt (14X45)
90163-TGH-A01
2
Flange Bolt (14X105)
90175-TRW-A00
1
CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment,
and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not
assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact
an authorized Honda automobile dealer.
©
2023 American Honda Motor Co., Inc. — All Rights Reserved
Page 1 of 9
Part Name
Part Number
Quantity
Flange Bolt (14X33)
90164-T20-A00
5
Washer Bolt (14X85)
90130-T20-A00
1
Flange Bolt (14X35)
90181-TBA-A00
2
Flange Bolt (14X80)
90108-T20-A00
3
Split Pin (3.0X22)
94201-30220
2
Washer Bolt (10X25)
90159-TBA-A00
3
Self-Lock Nut (12mm)
90215-SB0-003
6
Flange Nut (10mm)
90002-S10-000
2
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Civic Si
Operation
Number
Description
Flat Rate
Time
5131C0
Replace the EPS
1.9 hr
gearbox and transfer
motor. Includes steering
neutral position relearn,
DTC clear and
alignment.
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
03001
03217
A23037A
53640-T22-305
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
03001
03217
A23037B
53640-T21-306
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
03001
03217
A23037C
53640-T21-305
Civic 4-door and 5-door LX, EX, EX-T
Operation
Number
Description
Flat rate
Time
5131C0
Replace the EPS
1.9 hr
gearbox and transfer
motor. Includes steering
neutral position relearn,
DTC clear and
alignment.
Civic 4-door and 5-door Touring, Sport
Operation
Number
Description
Flat Rate
Time
5131C0
Replace the EPS
1.9 hr
gearbox and transfer
motor. Includes steering
neutral position relearn,
DTC clear and
alignment.
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REPAIR PROCEDURE
Refer to Service Information for a more in-depth power steering gearbox removal repair procedure.
1. Disconnect the 12 volt battery terminal.
2. Raise the vehicle to a comfortable working height.
NOTE: Keep the vehicle elevated for the remainder of the procedure.
3. Remove the front wheels.
4. Disconnect the steering joint.
NOTE:
•
Set the steering wheel straight ahead before disconnecting the shaft.
•
Do not turn the steering wheel while disconnecting the steering joint.
5. Remove the engine undercover.
6. Disconnect the EPS harness connectors.
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7. Remove the rubber exhaust mount.
8. Disconnect the stabilizer links located on top.
9. Remove the front lower assembly bolt (both sides).
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10. Loosen the outer tie-rod end nut (both sides).
11. Disconnect the front lower arms.
NOTE: During reassembly, loosely install the new flange nuts, then tighten them to the specified torque in the
numbered sequence shown.
12. Remove the engine torque rod front bolt.
13. Attach the subframe adapter to the front subframe.
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14. Raise a transmission jack and line up the slots in the subframe adapter arms with the bolt holes on the transmission
jack base, then securely attach the four bolts.
15. Remove the front subframe.
16. Transfer the tie rod ends to the replacement gearbox.
17. Transfer the steering shaft boot to the replacement gearbox.
18. Remove the steering gearbox from the subframe.
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19. Separate the EPS motor/control unit from the removed rack and retain for installation on the new gearbox.
20. Install new O-ring (the O-ring is kitted in the new gearbox) to the EPS motor/control unit.
NOTE:
•
Apply steering grease or equivalent to the O-ring.
•
Discard the motor bush.
21. Install the EPS motor/control unit, but do not install the mounting bolts.
22. Turn the EPS motor/control unit two or three times to both the left and right in a 45° arc as shown below.
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23. Loosely install the EPS motor/control unit mounting bolts by hand but do not fully torque them yet.
NOTE:
•
To prevent damaging the motor and/or gearbox, DO NOT use power tools to install or tighten the bolts.
•
Make sure the EPS motor/control unit is evenly seated on the P/S gearbox.
24. Torque the EPS motor/control unit mounting bolts to 20 N·m (15 lb-ft).
25. Install the new P/S gearbox with the EPS motor onto the subframe, and reassemble in the reverse order of removal.
26. Install the subframe, see the service information for proper installation and torque specs.
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27. Install the pinion shaft to the steering joint 29 N·m (21 lb-ft).
28. Install all removed parts in the reverse order of removal.
29. With the front wheels set straight ahead, make sure the steering wheel is centered.
30. Make sure the turning revolutions from center to full lock (left and right) are equal.
NOTE: If not, check the installation of the steering wheel and the engagement of the joint/pinion shaft splines.
31. With the tires raised, check for noise and abnormality by turning the steering wheel fully to the right and left
several times.
32. Confirm the EPS provides power assist.
33. Check that the EPS indicator does not come on.
34. Do a wheel alignment.
35. Do the VSA Sensor Neutral Position Memorization.
36. Park the vehicle on a flat and level surface.
37. Connect HDS to the DLC.
38. Turn the vehicle to the ON mode, but do not start the engine.
39. Set the steering wheel in the straight ahead position.
40. Select the ADJUSTMENT from the ABS/TCS/VSA menu with the HDS, then select ALL SENSOR, and follow the
screen prompts.
END
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