Service bulletin TSB_CHA091_R2

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10174693
Published by NHTSA	2020-05-05
Manufacturer's number	TSB_CHA091_R2
Manufacturer's date	2020-04-24
NHTSA component	STEERING

NHTSA's summary

TECHNICAL SERVICE BULLETIN: STEERING GEAR YOKE PLUG AND ASSEMBLY REPLACEMENT - This bulletin has been revised to include additional information. This bulletin provides the procedure to replace the steering gear box yoke plug and assembly on some models listed below, which may exhibit a ticking noise while turning the steering wheel with the vehicle stopped. This condition is caused by a worn lining on the steering gear box yoke assembly.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Steering

Vehicles listed
KIA CADENZA	2014, 2015, 2016
KIA OPTIMA	2011, 2012, 2013, 2014, 2015
KIA OPTIMA HYBRID	2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
KIA SORENTO	2016, 2017, 2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
2018533	2018-09-26. Steering
18V656000	2018-09-21. STEERING:ELECTRIC POWER ASSIST SYSTEM; STEERING:COLUMN

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PS750	2023-10-01. Service bulletin. PITSTOP: AWD SYSTEM CONCERN DUE TO TIRE CIRCUMFERENCE - This Pitstop provides information regarding potential concerns with the All-Wheel-Drive (AWD) system due to tire sizes of differing circumference. Some customers may complain of a chatter sensation felt in the drivetrain of the vehicle and/or the failure of drivetrain component(s). A difference in tire size (width, aspect ratio, construction, rim diameter etc.) may be the cause.
WTY023_TSB	2022-03-31. Service bulletin. TECHNICAL SERVICE BULLETIN: MDPS WARNING LAMP DIAGNOSTIC INSPECTION & SINGLE PARTS REPLACEMENT - This bulletin provides information regarding the diagnosis of Motor Driven Power Steering (MDPS), also known as Electronic Power Steering (EPS), and parts replacement associated with the ‘Warranty Extension Program’ (WTY023) on 2016-2017MY Optima (JF/JFa), 2017MY Optima HEV/PHEV (JF P/HEV), 2016-2017MY Sorento (UMa) vehicles produced in the ranges listed below. The affected vehicles may exhibit the MDPS (also known as EPS) warning lamp ‘ON’. The warranty coverage for repairs related to the MDPS unit due to illumination of the MDPS warning lamp has been extended to 15 years/150,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY023_REIMB_UMA	2022-02-04. Service bulletin. WARRANTY EXTENSION: REIMBURSEMENT FORM - This document is a Reimbursement Request form that was mailed with the customer letter advising them to submit the form if they had paid for repairs for this same matter prior to the warranty extension program launch.
WTY023_OWNR_UMA	2022-02-04. Service bulletin. WARRANTY EXTENSION: OWNER NOTIFICATION - This document is the notification to owners of the warranty extension program for WTY023. Kia is extending the New Vehicle Limited Warranty coverage for repairs related to the Motor Driven Power Steering (MDPS) unit, also known as Electronic Power Steering (EPS) unit, due to illumination of the EPS warning light for all 2016-2017 MY Sorento vehicles from 5 years/60,000 miles to 15 years/150,000 miles, whichever comes first,starting from the date the vehicle was first put into service.
WTY023_OWNR_JF	2022-02-04. Service bulletin. WARRANTY EXTENSION: OWNER NOTIFICATION - This document is the notification to owners of the warranty extension program for WTY023. Kia is extending the New Vehicle Limited Warranty coverage for repairs related to the Motor Driven Power Steering (MDPS) unit, also known as Electronic Power Steering (EPS) unit, due to illumination of the EPS warning light for all 2016-2017 MY Optima vehicles from 5 years/60,000 miles to 15 years/150,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY023_REIMB_JF	2022-02-04. Service bulletin. WARRANTY EXTENSION: REIMBURSEMENT FORM - This document is a Reimbursement Request form that was mailed with the customer letter advising them to submit the form if they had paid for repairs for this same matter prior to the warranty extension program launch.
WTY023_QA	2022-02-04. Service bulletin. WARRANTY EXTENSION: QUESTION AND ANSWER - This document is the Question and Answer Guide containing the most frequently asked questions regarding the warranty extension (WTY023). Kia America, Inc., is extending the New Vehicle Limited Warranty coverage for the Motor Driven Power Steering (MDPS) unit, also known as Electronic Power Steering (EPS) unit, from 5 years/60,000 miles to 15 years/150,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY023_DPSM	2022-02-04. Service bulletin. WARRANTY EXTENSION: DEALER PARTS AND SERVICE MANAGER MEMO - This document is the announcement to the dealer Parts and Service Managers of the warranty extension program for WTY023. Kia America, Inc., is extending the New Vehicle Limited Warranty coverage for the Motor Driven Power Steering (MDPS) unit, also known as Electronic Power Steering (EPS) unit, from 5 years/60,000 miles to 15 years/150,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY023_DP	2022-02-04. Service bulletin. WARRANTY EXTENSION: DEALER PRINCIPAL MEMO - This document is the announcement to the dealer principals of the warranty extension program for WTY023. Kia America, Inc., is extending the New Vehicle Limited Warranty coverage for the Motor Driven Power Steering (MDPS) unit, also known as Electronic Power Steering (EPS) unit, from 5 years/60,000 miles to 15 years/150,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY023_DPSM	2022-01-20. Service bulletin. WARRANTY EXTENSION: DEALER PARTS AND SERVICE MANAGER MEMO - This document is the announcement to the dealer Parts and Service Managers of the warranty extension program for WTY023. Kia America, Inc., is extending the New Vehicle Limited Warranty coverage for the Motor Driven Power Steering (MDPS) unit, also known as Electronic Power Steering (EPS) unit, from 5 years/60,000 miles to 15 years/150,000 miles, whichever comes first, starting from the date the vehicle was first put into service. The power steering uses a motor to assist in steering the vehicle. If the engine is off or if the power steering system becomes inoperative, the vehicle may be steered, but it will require increased steering effort by the driver. This warranty extension is to address specific concerns with the functionality of the MDPS unit.