GROUP

NUMBER

STEERING

Technical Service Bulletin
SUBJECT:

DATE

20-ST-003H
MODEL(S)

AUGUST, 2020

Multiple

C-MDPS WORM SHAFT BEARING NOISE

Description: Certain 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 assembly.

Applicable Vehicles:
2017 – 2020 MY Elantra (AD, VIN beginning with “KMH”)
2017 – 2018 or 2020 MY Elantra (ADa, VIN beginning with “5NP”) with production dates between
January 01, 2017 and February 28, 2018 or between November 07, 2019 and May 03, 2020
2018 – 2019 MY Elantra GT (PD)
2017 – 2020 MY Ioniq Hybrid/Plug-In/Electric Vehicle (AE HEV/PHEV/EV)
2018 – 2020 MY Kona (OS)
2019 – 2020 MY Kona EV (OS EV)
2017 – 2019 MY Santa Fe/XL (NC)
2017 – 2019 MY Sonata (LFa)
2017 – 2019 MY Sonata Hybrid/Plug-In (LF HEV/PHEV)
2017 MY Veloster (FS)
2020 MY Palisade (LX2)
2020 MY Sonata (DN8a)
2020 MY Sonata Hybrid (DN8 HEV)

NOTICE
2018 – 2020 MY Elantra (ADa, VIN beginning with “5NP”), with production dates between March
01, 2018 and November 06, 2019, please refer to TSB 20-ST-002H-1, C-MPDS Worm Shaft
Assembly Bearing Noise.
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

C-MDPS WORM SHAFT BEARING NOISE

SUBJECT:

Parts Information:
MODEL

ELANTRA
(AD/ADa)

ELANTRA GT
(PD)
IONIQ EV
(AE EV)
IONIQ HYBRID/PLUG-IN
(AE HEV/PHEV)
KONA
(OS)
KONA EV (OS EV)
PALISADE (LX2)
SANTA FE/XL
(NC)

SONATA
(LFa)
SONATA HYBRID/PLUG-IN
(LF HEV/PHEV)
SONATA
(DN8a)
SONATA HYBRID (DN8 HEV)

C-MDPS COLUMN
ASSY-STEERING P/N
56310-F2200
56310-F2201
56310-F2210
56310-F2410
56310-F2500
56310-F2501
56310-F2510
56310-G3000
56310-G3200
56310-G3300
56310-G7500
56310-G7501
56310-G7510
56310-G2500
56310-G2501
56310-G2510
56310-J9000
56310-J9010
56310-J9030
56310-K4000
56310-S8000
56310-S8020
56310-2W830
56310-2W840
56310-2W900
56310-2W910
56310-C2500
56310-C2510
56310-C2700
56310-C2710
56310-E6700
56310-E6710
56310-L0000
56310-L0010
56310-L5500

TSB #: 20-ST-003H

WORM SHAFT ASSY P/N
56351-F2AAA FFF
56351-G3AAA FFF
56351-F2AAA FFF
56351-G3AAA FFF
56351-G3AAA FFF
56351-F2AAA FFF
56351-G3AAA FFF
56351-F2AAA FFF
56351-G3AAA FFF
56351-G3AAA FFF
56351-G3AAA FFF
56351-S1AAA FFF

56351-C5AAA FFF
56351-C1AAA FFF
56351-C1AAB FFF
56351-C1AAA FFF
56351-C1AAB FFF
56351-C1AAA FFF
56351-C1AAB FFF
56351-L1AAA FFF
56351-L1AAA FFF

Page 2 of 14
SUBJECT:

C-MDPS WORM SHAFT BEARING NOISE

SUBJECT:

MODEL

C-MDPS COLUMN
ASSY-STEERING P/N

WORM SHAFT ASSY P/N

56310-2V405
56351-B3AAA FFF
56310-2V955
56351-B3AAA FFF
Lower Steering U-Joint Bolt P/N*
All Except DN8a/DN8 HEV and LX2
56415-2H000
LX2
56415-1M000
DN8a/DN8 HEV
56415-L1000
NOTE 1: Please refer to the online parts catalog to verify the C-MDPS Column Assy-Steering part
number installed in the vehicle to order the correct Worm Shaft Assembly part number.
NOTE 2: *Steering U-Joint Bolt cannot be reused during reassembly. Only one bolt is necessary for
this repair.
VELOSTER
(FS)

SST Information: Worm Shaft Assembly Plug Tool
MODEL

DESCRIPTION

PART NUMBER

VELOSTER (FS)

C-SEG 1
(A: 34.9mm)

0K563-T9100 FFF

ELANTRA (AD/ADa)
ELANTRA GT (PD)
IONIQ HYBRID/PLUG-IN
(AE HEV/PHEV)
IONIQ EV (AE EV)
KONA (OS)
KONA EV (OS EV)

C-SEG 2
(A: 42mm)

0K563-Q2100 FFF

SONATA (LFa)
SONATA HYBRID/PLUG-IN
(LF HEV/PHEV)
SANTA FE/XL (NC)
PALISADE (LX2)

D-SEG
(A: 44.9mm)

0K563-D6100 FFF

PICTURE

NOTE 1: To re-order any of the SSTs, contact Bosch at 1-866-539-4248.
NOTE 2: Sonata and Sonata Hybrid (DN8a and DN8 HEV) requires the use of snap-ring pliers to
access the worm shaft assembly.

TSB #: 20-ST-003H

Page 3 of 14
SUBJECT:

SUBJECT:

C-MDPS WORM SHAFT BEARING NOISE

Warranty Information:
MODEL

OP CODE OPERATION

OP TIME

ELANTRA (AD/ADa)
ELANTRA GT (PD)
KONA (OS)
KONA EV (OS EV)

56350F00

1.2 M/H

IONIQ (AE EV)
IONIQ HYBRID/PLUG-IN
(AE HEV/PHEV)

56350F01

1.0 M/H

SANTA FE/XL (NC)

56350F02

1.6 M/H

VELOSTER (FS)

MDPS Worm
Shaft
Assembly
56350F03
Replacement

SONATA (LFa)
SONATA HYBRID/PLUG-IN
(LF HEV/PHEV)
56350F04
SONATA (DN8a)
SONATA HYBRID
(DN8 HEV)
PALISADE (LX2)

1.5 M/H

CAUSAL NATURE CAUSE
PART
CODE
CODE

56390*

Q57

ZZ7

1.4 M/H

56350F06

1.1 M/H

NOTE 1: If a part is found in need of replacement while performing the repair for this TSB and the
affected part is still under warranty, submit a separate claim using the same Repair Order. If the
affected part is out of warranty, submit a Prior Approval Request for goodwill consideration prior to
performing the work.
NOTE 2: *Refer to applicable parts catalog for full causal part numbers.

TSB #: 20-ST-003H

Page 4 of 14
SUBJECT:

C-MDPS WORM SHAFT BEARING NOISE

SUBJECT:

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

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.



2.

MDPS Motor

To hear an example of the bearing
noise, refer to the link below.
https://youtu.be/ZCxFSskN-Rg

Replace the worm shaft assembly if noise is
heard.
If noise is not heard in this location, refer to
the shop manual for detailed diagnostic and
repair service procedures or refer to TSB 20ST-001H-1, Column-Mounted MDPS Repair
Information (or current TSB related to partial
C-MDPS Repairs) for additional information.

A

NOTICE
If the pinch bolts on either end of the
steering universal joint assembly are
removed, the bolts cannot be reused
during reassembly.

TSB #: 20-ST-003H

Page 5 of 14
SUBJECT:

C-MDPS WORM SHAFT BEARING NOISE

SUBJECT:

3.

Remove the C-MPDS assembly and
universal joint according to the applicable
vehicle shop manual.
*Steering System > Motor Driven Power
Steering > MDPS Assembly > Repair
Procedures

NOTICE