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Service bulletins for the 2017 Kia Cadenza

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.

72 on file from NHTSA, as of 2026-10-19.

Warranty extensions
WTY039_TSB_R42025-10-09. ENGINE. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY: INSPECTION/REPLACEMENT (WTY039) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB_R32024-12-06. ENGINE. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY034_TSB_R12024-09-26. FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: HIGH-PRESSURE FUEL PUMP REPLACEMENT (WTY034) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY034) to diagnose the ‘Malfunction Indicator Lamp’ (MIL) accompanied by DTC P0088 and, if necessary, replace the high-pressure fuel pump on 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY039_TSB2024-06-18. ENGINE. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039) - This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub-assembly on 2014-2015 MY Sorento (3.3L GDI Lambda), 2014-2017 MY Cadenza (3.3L GDI Lambda), 2015-2016 MY Sedona (3.3L GDI Lambda) vehicles.
WTY039_REIMB2024-05-29. ENGINE. WARRANTY EXTENSION CAMPAIGN: REQUEST FOR REIMBURSEMENT FORM (WTY039) - 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.
WTY039_OWNR_VG2024-05-24. ENGINE. WARRANTY EXTENSION CAMPAIGN: OWNER NOTIFICATION (WTY039) - This document is the owner notification advising that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for certain repairs related to the vehicle’s engine in 2014-2017 MY Cadenza vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. Under certain severe operating conditions and over time, the engine in the vehicle may develop a coolant leak from the cylinder head gasket area.
WTY034_TSB2024-05-24. FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: HIGH-PRESSURE FUEL PUMP REPLACEMENT (WTY034) - his bulletin provides information associated with the ‘Warranty Extension Program’ (WTY034) to diagnose the ‘Malfunction Indicator Lamp’ (MIL) accompanied by DTC P0088 and, if necessary, replace the high-pressure fuel pump on 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY034_REIMB2024-05-24. ENGINE. WARRANTY EXTENSION CAMPAIGN: REIMBURSEMENT FORM (WTY034) - 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.
WTY034_OWNR_YG2024-05-24. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: OWNER NOTIFICATION (WTY034) - This document is the owner notification advising that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for the high-pressure fuel pump in 2017-2020 MY Cadenza vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY034_QA2024-05-23. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: QUESTION AND ANSWER (WTY034) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Warranty Extension Campaign WTY034.
WTY034_DPSM2024-05-23. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: DEALER PARTS & SERVICE MANAGERS MEMO (WTY034) - This document is the announcement to the dealer Parts and Service Managers that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the high-pressure fuel pump for eligible vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. This warranty extension is to address the high-pressure fuel pump condition on 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY034_DP2024-05-23. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: DEALER PRINCIPAL MEMO (WTY034) - This document is the announcement to the dealer principals that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the high-pressure fuel pump for eligible vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. This warranty extension is to address the high-pressure fuel pump condition on the following vehicles: 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY039_QA2024-05-23. ENGINE. WARRANTY EXTENSION CAMPAIGN: QUESTION AND ANSWER - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Warranty Extension Campaign WTY039.
WTY039_DPSM2024-05-23. ENGINE. WARRANTY EXTENSION CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (WTY039) - This document is the announcement to the dealer Parts and Service Managers that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for certain repairs related to the vehicle’s engine in the following vehicles equipped with 3.3L V6 engines: 2014-2015 MY Sorento vehicles, manufactured from December 17, 2012 through December 11, 2014, 2014-2017 MY Cadenza vehicles, manufactured from February 1, 2013 through July 12, 2017, and 2015-2016 MY Sedona vehicles, manufactured from July 21, 2014 through March 17, 2016. This will extend the warranty from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. Under certain severe operating conditions and over time, the engine in the vehicle may develop a coolant leak from the cylinder head gasket area.
WTY039_DP2024-05-23. ENGINE. WARRANTY EXTENSION CAMPAIGN: DEALER PRINCIPAL MEMO (WTY039) - This document is the announcement to the dealer principals that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for certain repairs related to the vehicle’s engine in the following vehicles equipped with 3.3L V6 engines: 2014-2015 MY Sorento vehicles, manufactured from December 17, 2012 through December 11, 2014, 2014-2017 MY Cadenza vehicles, manufactured from February 1, 2013 through July 12, 2017, and 2015-2016 MY Sedona vehicles, manufactured from July 21, 2014 through March 17, 2016. This will extend the warranty from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service

A warranty extension may pay for a repair after the basic warranty has ended. Read the document for which vehicles and which repair it covers.

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Bulletins, newest first
WTY039_TSB_R72025-12-24. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039 - REVISION 7) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
PS7972025-12-18. Other. BACK OVER PREVENTION: WARNINGS. PITSTOP: TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop provides information related to Parking Distance Warning (PDW) alerts and repairs involving ultrasonic sensors. The PDW system alerts the driver while parking, by calculating distance based on the difference in signal transmission and reception times between the vehicle (ultrasonic sensor) and an object. The membrane film of the ultrasonic sensor is used for object detention and can be damaged by stone chips or foreign substances while driving. Damage to the cover of the ultrasonic sensor can also lead to damage to the internal circuit. As a result of this external damage, the PDW system may not receive the proper signal from the ultrasonic sensor. In some cases, the system may cause a false alarm, no alert, or phantom warnings by a “Warning Lamp’ to be displayed on the cluster. The ultrasonic sensor membrane film should be always inspected for external damage and if any part replacement should be treated as a general repair, not as a warranty claim repair for this concern. (Please note that this Pitstop only applies to models/trims that are equipped with the ultrasonic sensors.)
WTY039_TSB_R62025-12-10. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039 REVISION 6) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB_R52025-11-20. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN (WTY039) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB_R42025-10-09. Warranty extension. ENGINE. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY: INSPECTION/REPLACEMENT (WTY039) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
TSB_TRA046_R52025-04-23. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, and the transmission oil cooler is transferred to the new transmission.
WTY034_TSB_R22025-03-28. Service bulletin. FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: HIGH-PRESSURE FUEL PUMP REPLACEMENT (WTY034) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY034) to diagnose the ‘Malfunction Indicator Lamp’ (MIL) accompanied by DTC P0088 and, if necessary, replace the high-pressure fuel pump on 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 26, 2020.
WTY039_TSB_R32024-12-06. Warranty extension. ENGINE. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB_R22024-11-06. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY034_TSB_R12024-09-26. Warranty extension. FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: HIGH-PRESSURE FUEL PUMP REPLACEMENT (WTY034) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY034) to diagnose the ‘Malfunction Indicator Lamp’ (MIL) accompanied by DTC P0088 and, if necessary, replace the high-pressure fuel pump on 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY039_TSB_R12024-08-21. Service bulletin. ENGINE. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub assembly on 2014-2015 MY Sorento, 2014-2017 MY Cadenza, and 2015-2016 MY Sedona vehicles, equipped with 3.3L GDI engines. The warranty coverage for repairs related to the cylinder head gasket will be extended from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY039_TSB2024-06-18. Warranty extension. ENGINE. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: ENGINE SUB ASSEMBLY INSPECTION/REPLACEMENT (WTY039) - This bulletin provides information associated with the ‘Warranty Extension Program’ (WTY039) to diagnose a coolant leak from the cylinder head gasket area and, if necessary, replace the engine sub-assembly on 2014-2015 MY Sorento (3.3L GDI Lambda), 2014-2017 MY Cadenza (3.3L GDI Lambda), 2015-2016 MY Sedona (3.3L GDI Lambda) vehicles.
TSB_TRA046_R42024-06-04. Service bulletin. POWER TRAIN. This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced.
WTY039_REIMB2024-05-29. Warranty extension. ENGINE. WARRANTY EXTENSION CAMPAIGN: REQUEST FOR REIMBURSEMENT FORM (WTY039) - 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.
WTY039_OWNR_VG2024-05-24. Warranty extension. ENGINE. WARRANTY EXTENSION CAMPAIGN: OWNER NOTIFICATION (WTY039) - This document is the owner notification advising that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for certain repairs related to the vehicle’s engine in 2014-2017 MY Cadenza vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. Under certain severe operating conditions and over time, the engine in the vehicle may develop a coolant leak from the cylinder head gasket area.
WTY034_TSB2024-05-24. Warranty extension. FUEL/PROPULSION SYSTEM. TECHNICAL SERVICE BULLETIN: WARRANTY EXTENSION CAMPAIGN: HIGH-PRESSURE FUEL PUMP REPLACEMENT (WTY034) - his bulletin provides information associated with the ‘Warranty Extension Program’ (WTY034) to diagnose the ‘Malfunction Indicator Lamp’ (MIL) accompanied by DTC P0088 and, if necessary, replace the high-pressure fuel pump on 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY034_REIMB2024-05-24. Warranty extension. ENGINE. WARRANTY EXTENSION CAMPAIGN: REIMBURSEMENT FORM (WTY034) - 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.
WTY034_OWNR_YG2024-05-24. Warranty extension. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: OWNER NOTIFICATION (WTY034) - This document is the owner notification advising that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for the high-pressure fuel pump in 2017-2020 MY Cadenza vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service.
WTY034_QA2024-05-23. Warranty extension. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: QUESTION AND ANSWER (WTY034) - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Warranty Extension Campaign WTY034.
WTY034_DPSM2024-05-23. Warranty extension. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: DEALER PARTS & SERVICE MANAGERS MEMO (WTY034) - This document is the announcement to the dealer Parts and Service Managers that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the high-pressure fuel pump for eligible vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. This warranty extension is to address the high-pressure fuel pump condition on 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY034_DP2024-05-23. Warranty extension. FUEL/PROPULSION SYSTEM. WARRANTY EXTENSION CAMPAIGN: DEALER PRINCIPAL MEMO (WTY034) - This document is the announcement to the dealer principals that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for repairs related to the high-pressure fuel pump for eligible vehicles from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. This warranty extension is to address the high-pressure fuel pump condition on the following vehicles: 2019-2021 MY Sedona vehicles manufactured from February 13, 2018 through July 8, 2020, 2017-2020 MY Cadenza vehicles manufactured from June 2, 2016 through October 15, 2020, and 2019-2020 MY Sorento vehicles equipped with 3.3L V6 Engines manufactured from January 24, 2018 through October 15, 2020.
WTY039_QA2024-05-23. Warranty extension. ENGINE. WARRANTY EXTENSION CAMPAIGN: QUESTION AND ANSWER - This document is the Question and Answer Guide containing the most frequently asked questions regarding the Warranty Extension Campaign WTY039.
WTY039_DPSM2024-05-23. Warranty extension. ENGINE. WARRANTY EXTENSION CAMPAIGN: DEALER PARTS AND SERVICE MANAGER MEMO (WTY039) - This document is the announcement to the dealer Parts and Service Managers that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for certain repairs related to the vehicle’s engine in the following vehicles equipped with 3.3L V6 engines: 2014-2015 MY Sorento vehicles, manufactured from December 17, 2012 through December 11, 2014, 2014-2017 MY Cadenza vehicles, manufactured from February 1, 2013 through July 12, 2017, and 2015-2016 MY Sedona vehicles, manufactured from July 21, 2014 through March 17, 2016. This will extend the warranty from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service. Under certain severe operating conditions and over time, the engine in the vehicle may develop a coolant leak from the cylinder head gasket area.
WTY039_DP2024-05-23. Warranty extension. ENGINE. WARRANTY EXTENSION CAMPAIGN: DEALER PRINCIPAL MEMO (WTY039) - This document is the announcement to the dealer principals that Kia is extending the New Vehicle Limited Warranty coverage, to all owners, for certain repairs related to the vehicle’s engine in the following vehicles equipped with 3.3L V6 engines: 2014-2015 MY Sorento vehicles, manufactured from December 17, 2012 through December 11, 2014, 2014-2017 MY Cadenza vehicles, manufactured from February 1, 2013 through July 12, 2017, and 2015-2016 MY Sedona vehicles, manufactured from July 21, 2014 through March 17, 2016. This will extend the warranty from 5 years / 60,000 miles to 15 years / 180,000 miles, whichever comes first, starting from the date the vehicle was first put into service
TSB_TRA046_R32022-12-06. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced, refer to applicable vehicles in the chart starting on page 2.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.