NHTSA ID Number: 10180985
Manufacturer Communication Number: 20-ST-003H-1
TSB/Document Date: 2020-10-08
Summary
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.
GROUP
STEERING
Technical Service Bulletin
SUBJECT:
DATE
NUMBER
20-ST-003H-1
MODEL(S)
SEPTEMBER, 2020
Multiple
C-MDPS WORM SHAFT BEARING NOISE
THIS TSB SUPERSEDES 20-ST-003H TO REVISE THE CAUSAL PART NUMBER IN THE
WARRANTY INFORMATION TABLE AND UPDATE THE BEARING NOISE EXAMPLE VIDEO.
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-2, 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-1
WORM SHAFT ASSY P/N
56351-F2AAAFFF
56351-G3AAAFFF
56351-F2AAAFFF
56351-G3AAAFFF
56351-G3AAAFFF
56351-F2AAAFFF
56351-G3AAAFFF
56351-F2AAAFFF
56351-G3AAAFFF
56351-G3AAAFFF
56351-G3AAAFFF
56351-S1AAAFFF
56351-C5AAAFFF
56351-C1AAAFFF
56351-C1AABFFF
56351-C1AAAFFF
56351-C1AABFFF
56351-C1AAAFFF
56351-C1AABFFF
56351-L1AAAFFF
56351-L1AAAFFF
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-B3AAAFFF
56310-2V955
56351-B3AAAFFF
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. Use this
Worm Saft Assembly part number as the causal part number when submitting the claim.
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-T9100FFF
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-Q2100FFF
SONATA (LFa)
SONATA HYBRID/PLUG-IN
(LF HEV/PHEV)
SANTA FE/XL (NC)
PALISADE (LX2)
D-SEG
(A: 44.9mm)
0K563-D6100FFF
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-1
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
PART
56351*
NATURE CAUSE
CODE
CODE
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 the Parts Information table above for the applicable full Worm Shaft Assembly
Part Number.
TSB #: 20-ST-003H-1
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/22PI3hAEfnk
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-2, 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-1
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
Before removing the C-MDPS assembly,
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
- 【FOR END USER & DIYERS】 This error code reader AL319 is...
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 20-ST-003H-1
Replacement Service Bulletin Number:
MFR Communication Date: 2020-09-09
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used escaner automotriz device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way, and we’ll provide a solution within 24 hours. THINKSCAN 689BT Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- [Good News] THINKSCAN 689BT is the most competitive automotive scan tool to date, offering wireless updates with no subscription fees(valued 500Buc.ks) . With all the features of THINKTOOL PD8,PRO, built on Android 10 platform with 4-core CPU, 4GB RAM
and 64GB ROM, serving up to 5X faster than older MAX/MINI/PLUS vehicle scanners escaner automotriz, no more slow and delayed feedbacks, it's time to update your garage tool. - [Big Money Saver] Premium THINKSCAN 689BT Wireless Diagnostic Scanner Escaner Automotriz, save up to 400USD per year, includes all useful features: Full bi-directional controls, ECU coding, 34+ services, OEM all system diagnostics, Worldwide vehicles coverage, CAN FD & DoIP, FCA AutoAuth（The 689BT only provides a login and purchase portal, and users are required to register for an FCA account and pay a membership fee in order to perform the relevant automotive diagnostics)
- [3000+ Active Tests]Active testing is one of the most useful features in automotive maintenance and greatly improves mechanic efficiency. THINKCAR 689BT bidirectional scanner can send action commends to vehicle sub-systems or components for active test without using vehicle controls. It can perform various tests such as: EVAP Test, Fuel Trim Reset, Injector Buzz Test, Window/ Mirror/ Door Lock Test, Pump and Value Tests, etc. Get functions from "Diagnose>Car Model>System>Active Test".
- [Hot Advanced Features] 689BT bidirectional tool scanner for car newly adds ECU Coding, Power Balance, Flash Hidden Functions, Reset Adaptive Data, Match Replaced Components, Customize OE-Settings. Such as: 1. changing the color of interior lights 2. switching on/off the auto hold, 3. customizing dash kits 4. activating the auto side mirror folding function 5. disables auto start-stop. Note: Coding functions vary by model&year.
- 【15+ Advanced Reset & Calibration Functions】The Thinkdiag scanner provides 15+ professional maintenance functions, including:✔ Oil Reset | ✔ ABS Bleeding | ✔ Injector Coding | ✔ SAS Reset✔ TPMS Reset | ✔ BMS Reset | ✔ Transmission Adaptation | ✔ AFS Reset | ✔ Sunroof Calibration | ✔ Brake Reset | ✔ Suspension Relearn | ✔ Electronic Throttle Relearn | ✔ Seat Calibration | + More reset/relearn/calibrate/adaptive functions under automotive full systems diagnostic menu. Ideal professional OBDII scanner for mechanics and DIY enthusiasts, Thinkdiag delivers professional OE-level diagnostics with adaptive relearn capabilities for precise vehicle servicing.
- 【Full-System Diagnostics OBD2 Scanner Bluetooth】 Thinkdiag OBD2 Scanner supports all Systems diagnostic function, it can read/clear DTCs, read live data, read control module information, actuation tests and maintenance functions for ECM, BCM, SRS, TCM, BMS, TPMS, SAS, A/C system etc... It works with most car models after 1996, cover more than 120+ car brands. All car make and reset software come with 1 year update without any charge, much valuable and powerful than 1000 dollars level scanners in the market.
- 【Potential Feature Activation】 Thinkdiag diagnose obd2 scanner Bluetooth allows you to match the replaced components with ECU, activate potential functions for BMW, for GM, for Benz etc. Adjust some annoying features, adapt vehicle's settings to improve performance. No matter you are private owner or professional technician, Thinkdiag is a powerful and handy scanner in your repair tool list. Potential features are not suitable for every car models, please check with us before purchase. This superior function required newest Android OS device, it performs better on Android cell phone.
- 【Bidirectional Test/Active Test】 Thinkdiag car code reader actuates solenoids and actuators for active testing, send commands to systems/components to test their real-time working status, without using manual vehicle controls which saves much diagnostic time and effort to identify malfunction causes. You can check windows, doors, mirrors, sunroof, fans, fuel pump and other parts working status by actuation test function, thinkdiag supports 10000+ active tests. When you process Automotive full system diagnostic, you can do active test on every supported module.
- 【Intelligent Diagnostic Tool with Auto-VIN】Thinkdiag Bluetooth OBD2 scanner makes your smart phone device become a professional vehicle diagnostic tool, it compatible with Android and iOS system. Auto-VIN function supports the Thinkdiag identifies the most car models automatically, if autovin failed, you can choose car info manually. Full system Vehicle health report will be automatically created after diagnosis, report can be shared. Live Data Stream combined 4-in-1 Graphing+Data Record better for monitoring vehicle performance and analyze the abnormal parameter.
- 【Powerful Bidirectional Control -- Active Test】Good News! The THINKSCAN 662 obd2 scanner has bidirectional control function,which is the most popular feature among mechanics.This function is mainly used to test whether the executing components in the electronic control system can work normally,By requesting information from the vehicle's ECU or sending commands to the ECU module to execute commands and identify maintenance status,quickly locate the cause of the fault.Such as ABS,Fuel Injectors,Adjusting Throttle,Coolant Fans,Radiator Fans,Coolant Pumps,EV.AP Test, Fuel Trim Reset,Injector Buzz Test,Pump/ Value Test,etc. Effectively shorten diagnosis time and reduce diagnosis costs.
- 【Unlock Pro-Level Diagnostics With Half Costs】 THINKSCAN 662 obd2 scanner diagnostic tool Delivers Premium Scanning Power for Half the Price! The OBD2 scanner can handle common issues with ECM,TCM,ABS,SRS. It can easily read and clear fault codes, analyze data streams, and ensure quick identification of problems. THINKSCAN 662 bidirectional scan tool has 12 practical reset functions, including Airbag Reset,ABS Bleeding,BMS,Brake Reset, D.P.F,Throttle Adaptation,Injector Coding,OIL Reset,steering angle Reset,Gearbox,TPMS,and more. The car scanner diagnostic tool very suitable for DIY enthusiasts, car repair technicians, and small and medium-sized repair shops.
- 【Multi Functional Intelligent Car Scanner Diagnostic Tool】 Automatic VIN + Real-time Data + DTC Lookup + Historical Diagnostic Records: This OBD2 scanner features auto serch technology, allowing for car recognition without the need for manual input. The real-time data of the car ECU is read and displayed in the form of text or a 4-in-1 merged waveform chart. You can save, share, print or send the entire inspection report via email for analysis. Historical diagnostic reports help you quickly identify vehicle issues and understand the condition of the vehicle. The built-in 'feedback' module provides customized repair Operation recommendations from our certified professionals.
- 【Upgraded Hardware + Ergonomically Engineered】 THINKSCAN 662 OBD2 scanner has a friendly combination of touch screen and physical buttons with an ergonomic appearance for comfortable use.Experience 2x faster scans and 50% longer lifespan vs standard models.This scanner para autos boast a 4-core 1.8GHz CPU,6.2-inch HD touch screen,2GB RAM + 32GB ROM storage capacity,a long-lasting 4150mAh battery,Android 8 ensures lightning-fast bootup and processing.The scanner is robust with rubberized protection that you can store and use in the trunk or garage.Whether you are engaged in Home car maintenance or road rescue car repair,this car scanner can help you perfectly solve car problems.
- 【Effortless Setup & Scanning - Intuitive for All Skill Levels】No More Complicated Scanners! The User Interface is as User-Friendly as THINKCAR 689BT! Truly Plug-and-Play,The downward sliding setup shortcut portal and drawer function shortcut portal make you use this scan tool as easy as using your own cell phone.The car scanner supports setup screenshot,screen recording,volume adjustment,this scan tool includes product e-manuals,instructional videos,and fault code libraries,users can check the usage guide,perfect for DIY car owners,Maintenance technician.If your father,husband,brother,boyfriend enjoys car repairs,THINKSCAN 662 is a great gift choice, and it has amazing family value.
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.