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Service bulletin 21-AT-006H

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)
TypeService bulletin
NHTSA id10196546
Published by NHTSA2021-06-10
Manufacturer's number21-AT-006H
Manufacturer's date2021-05-21
NHTSA componentPOWER TRAIN

NHTSA's summary

Hyundai approves only the ATF, DCT gear oil and IVT gear oil specified in the vehicle’s owner’s manual. • Use of other ATF may result in improper shift quality or other drivability conditions. • Use of other DCT and IVT gear oil may result in reduced durability. Hyundai does not approve the use of any aftermarket ATF or gear oil additives.

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

Transmission and driveline

Vehicles listed
HYUNDAI ACCENT1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
HYUNDAI AZERA2006, 2007, 2008, 2009, 2010
HYUNDAI ELANTRA1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
HYUNDAI ELANTRA TOURING2009 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI ELANTRA TOURING2010
HYUNDAI ELANTRA TOURING2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI ENTOURAGE2007, 2008
HYUNDAI SANTA FE2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
HYUNDAI SONATA1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
HYUNDAI TIBURON1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
HYUNDAI TUCSON2005, 2006, 2007, 2008, 2009
HYUNDAI XG 3502004
HYUNDAI XG3002001
HYUNDAI XG3002002 to 2004
HYUNDAI XG300L2001 (the catalog's model; the bulletin names a series or trim of it)
HYUNDAI XG300L2002
HYUNDAI XG3502001
HYUNDAI XG3502002, 2003, 2004, 2005

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

Recalls for the same vehicles and component
01V3620002001-11-29. POWER TRAIN
19991401999-07-27. Powertrain
99V1780001999-07-07. POWER TRAIN:AUTOMATIC TRANSMISSION

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
24-AT-002H2024-04-16. Service bulletin. This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with Incorrect Ratio DTC (transmission clutch slip in gear above limit) listed on Page 2.
24-01-026H2024-04-16. Service bulletin. Some Santa Fe (CM) vehicles may have an engine that potentially leaks oil from the front cylinder bank’s valve cover onto the alternator. Oil could damage the alternator resulting in illumination of the charging system warning lamp and disablement of the charging system. If the vehicle is continually driven without recharging the battery, the engine will eventually shut off, increasing the risk of a crash. This bulletin outlines the procedures to inspect for T-joint leakage and install an oil protector to address this issue.
23-01-014H-52023-09-06. Service bulletin. Hyundai has launched an anti-theft software upgrade and window decal campaign (Campaign 993), combined with an anti-theft steering wheel lock campaign (Campaign P32), in response to an increase in thefts of certain 2011-2022MY Hyundai vehicles not equipped with engine immobilizers targeted through social media. For certain vehicles that cannot be updated with the software (Campaign 993), Hyundai is offering customers steering wheel locks at the dealer (Campaign P32). This Dealer Best Practices Guide provides information to assist dealership personnel with customer questions relating to the immobilizer software upgrade, window decals and steering wheel lock ant-theft solutions available from HMA through Hyundai dealers.
20-AT-017H2020-06-06. Service bulletin. If you are servicing an applicable vehicle with the following symptoms and DTC, follow the Service Procedure on Page 4. • Check Engine light on • DTC P0880/P088000 - TCM Power signal error open/short • Transmission stuck in 4th gear fail-safe • Harsh shift into Reverse and Drive
20-AT-016H2020-05-07. Service bulletin. The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions:
20-AT-014H2020-05-07. Service bulletin. If you are servicing an applicable vehicle with a “Check Engine” light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness.
20-AT-008H2020-03-07. Service bulletin. If you are servicing an applicable vehicle with a “Check Engine” light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness.
20-AT-001H2020-02-03. Service bulletin. This TSB provides a procedure to diagnose and repair a transaxle for the following Incorrect Ratio DTC (transaxle clutch slipping more than 200 rpm in gear).
19-AT-021H-12020-01-21. Service bulletin. If you are servicing a vehicle with a transmission slipping concern, follow the Service Procedure shown below and perform a stall test. This TSB provides a procedure to test each clutch in the transmission. If the vehicle fails the stall test, replace the transmission. ? PASS: Stall speed is between 1700~2900 rpm (See shop manual for stall speed). ? FAIL: Engine revs to redline limit (6,000~6,500 rpm). If so, replace the transmission.
19-AT-015H2019-09-30. Service bulletin. If you are servicing an applicable vehicle with a ?Check Engine? light on and one or more of the DTC listed below, follow the repair procedure and replace the related solenoid and oil pressure harness