GROUP

NUMBER

STEERING
DATE

Technical Service Bulletin
SUBJECT:

22-ST-003H
MODEL(S)

APRIL 2022

Sonata (DN8A)

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Description: Certain 2020-2022MY Sonata (DN8A) vehicles may develop a bearing noise within the
Motor Driven Power Steering (MDPS) column worm shaft assembly. If bearing noise is heard, follow
the procedure in this bulletin to replace the worm shaft bearing.

Applicable Vehicles:
Certain 2020 – 2022MY Sonata (DN8A) produced from October 22, 2019 to December 30, 2021

Parts Information:
PART NAME

PART NUMBER

2

1

SMALL
BEARING KIT

PART
DESCRIPTION

PHOTO

56359-L1AAAFFF
3

1.
2.
3.
4.

End cover assy
Sliding damper
Bearing
Paper stick

4

NOTE: Sonata (DN8A) requires the use of the end cover (part #1).

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT:

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

SST Information:
PART NAME

PART NUMBER

MDPS
SMALL BEARING
REMOVAL TOOL

0K563-L2100FFF

MDPS
SMALL BEARING
MOUNTING TOOL

0K563-L2200FFF

PHOTO

NOTE: All dealers were sent one of each tool at the launch of TSB 21-ST-003H in October 2021.
NOTE: The tools sent may or may not have part numbers ending in “FFF” (0K563-L2100/0K563L2200).

Warranty Information:
MODEL

OP CODE

OPERATION

OP
TIME

CAUSAL
PART

SONATA (DN8A)

20DA01R0

SMALL BEARING
REPLACEMENT

0.6
M/H

56359L1AAAFFF

NATURE CAUSE
CODE
CODE
Q57

ZZ6

NOTE 1: Submit claim on Campaign Claim Entry Screen.
NOTE 2: If a part that is not covered by this TSB is in need of replacement while performing this
TSB, and the affected part is still under warranty, please submit a separate claim using the same
repair order. If the part is out of warranty, submit a prior approval request for goodwill consideration
prior to performing the work.

TSB #: 22-ST-003H

Page 2 of 12
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SUBJECT:

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Service Procedure:
1.
Determine if bearing noise comes from the
MDPS column and housing.

2.

•

Start the engine and turn the steering
wheel left and right.

•

Listen for the bearing noise occurring
from the worm shaft housing (A). This
noise will be located near the CMDPS motor on the steering column.

•

To hear an example of the bearing
noise, refer to the link or QR code
below.
https://youtu.be/22PI3hAEfnk

Replace the worm shaft small bearing if
noise is heard.

MDPS Motor

A

If noise is not heard in this location, refer to
the shop manual for detailed diagnostic and
repair service procedures or refer to the
most current Column-Mounted MDPS Repair
Information TSB for additional information.
3.

Ensure the wheels are straight and the
steering wheel is level.

4.

Record the customer’s AM, FM, and SXM
radio preset stations.

TSB #: 22-ST-003H

Page 3 of 12
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5.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Disconnect the negative (-) battery terminal.

NOTICE
Wait at least 3 minutes before
proceeding to ensure voltage is bled
off.
Battery Terminal Tightening Torque

lb-in • 69.6-86.4
lb-ft • 5.8-7.2

!

!

kgf.m • 0.1-1.0

Not removing the negative (-) terminal
from the battery may result in
accidental airbag deployment and
possible physical injury.

N.m • 7.8-9.8

6.

CAUTION

Removal of the MDPS assembly is not
required to replace the small bearing located
in the MDPS steering column and housing.
Several parts might need to be removed to
gain access to the small bearing.
If equipped, carefully remove the driver's
knee airbag following the procedures in the
applicable shop manual.
Restraint > Airbag Module > Knee Airbag
(KAB) Module

!

!

CAUTION

The airbag may accidently be deployed
and possibly cause physical injury.
After removing the knee airbag
module, position airbag with the cover
facing upward.

7.

After removing the KAB, additional parts
may have to be removed to gain access to
the small bearing. Follow the applicable
shop manual for part removal procedures.

TSB #: 22-ST-003H

Page 4 of 12
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SUBJECT:

8.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

DN8A
Remove the plastic cover (B) by
squeezing/breaking the six cover tabs with
pliers.

NOTICE
Use the supplied plastic cover during
reassembly.
B

Ensure cover snaps into place and is
flush with the housing.

9.

Remove the anti-rattle plug (C).
Anti-Rattle Plug Tightening Torque
C

lb-in • 86.4-112.8
lb-ft • 7.2-9.4
kgf.m • 1.0-1.3
N.m • 9.8-12.8

TSB #: 22-ST-003H

Page 5 of 12
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10.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Remove the anti-rattle spring (D).

NOTICE
Keep the anti-rattle spring free of
debris after removal. Reuse the spring
during reassembly.

D

11.

Remove the slide pin (E).

NOTICE
Keep the slide pin free of debris after
removal. Reuse the slide pin during
reassembly.

TSB #: 22-ST-003H

E

Page 6 of 12
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12.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Remove the sliding damper (F) and discard.

F

TSB #: 22-ST-003H

Page 7 of 12
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13.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Use the MDPS small bearing removal tool,
to remove and discard the bearing.
How to use the tool
1. Insert the ends (a) of the tool into the
MDPS housing to grasp the outer
race of the bearing.
2. Slowly turn the threaded rod (b) until
the tip (c) reaches the center of the
bearing and worm shaft.
3. Continue to turn the rod slowly until
the bearing is pulled off the worm
shaft.

b

b

c

a

TSB #: 22-ST-003H

Page 8 of 12
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SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

14.

Use the supplied paper stick to remove the
excess grease.

15.

Remove the bolt (G) from the MDPS small
bearing mounting tool. This bolt will be used
to locate the tool on the MDPS housing.

G

NOTICE
After completing the bearing
installation procedure, thread the bolt
back into its original position.

16.

Insert the new, small bearing into the
bearing holder.

TSB #: 22-ST-003H

Page 9 of 12
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17.

18.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Place the tool onto the MDPS housing as
shown in the photo in the right. Slide the bolt
(H) through the hole and then thread the bolt
into the anti-rattle plug boss (I). Tighten the
bolt (H) until the tool is firmly held onto the
MDPS housing.

I
H

Use a torque wrench to slowly seat the
bearing into position on the worm shaft.
Bearing Seating Torque

lb-in • 26.52
lb-ft • 2.21
kgf.m • 0.31
N.m • 3.0

NOTICE
Note the small torque values to seat
the bearing.
Only use hand tools. Electric tools may
damage the bearing during assembly.

TSB #: 22-ST-003H

Page 10 of 12
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19.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Remove the tool from the MDPS housing
and inspect the bearing.
Ensure the bearing is fully seated and the
end of the worm shaft is protruding
approximately 1.2mm (0.047 inch).
If the bearing did not seat as shown in the
photo, increase the torque setting on the
torque wrench and continue to slowly seat
the bearing.
Increased Bearing Seating Torque

lb-in • 44.28

OK
Bearing is seated
properly. The end
of the worm shaft is
protruding.

Not OK
Bearing is not
seated properly.
The end of the
worm shaft is flush
with the bearing.

lb-ft • 3.69
kgf.m • 0.51
N.m • 5.0

NOTICE
If the bearing is removed during this
procedure, do not reinstall the bearing
as it may be damaged and cause a
noise. A new bearing must be used.

TSB #: 22-ST-003H

Page 11 of 12
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20.

SONATA (DN8A) C-MDPS WORM SHAFT BEARING NOISE

Install the new sliding damper. Align the hole
on the side of the sliding damper (J) with the
anti-rattle plug boss (I).
I

Align this side with
the hole with the
plug boss.
21.

Reinstall parts in the reverse order of
removal.

22.

Reconnect the negative battery cable after
all the components have been reinstalled to
the vehicle.

23.

If necessary, program the customer’s AM,
FM, and SXM radio preset stations.

24.

The service procedure is now complete.

J

Not this side.

NOTICE
Use the supplied plastic cover during
reassembly.

Ensure cover snaps into place and is
flush with the housing.

TSB #: 22-ST-003H

Page 12 of 12
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