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Service bulletins for the 2018 Kia Sorento

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.

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

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Only bulletins with component: Automatic transmission are shown. Show all

Bulletins, newest first
TSBENG177B_R12018-02-12. Service bulletin. POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. TSB - SERVICE ACTION: 2.4L SHIFT QUALITY & WAKE-UP LOGIC IMPROVEMENT (SA316B) - This bulletin provides the procedure to improve the logic of the Electronic Control Unit (ECU) and Transmission Control Unit (TCU) on some 2018MY Optima (JFa) 2.4L, produced from April 18, 2017 through September 7, 2017, and some 2017MY Sorento (UMa) 2.4L vehicles, produced from March 31, 2017 through December 6, 2017, which may experience an extended crank and/or a shift quality concern, such as a hard downshift, upshift, and/or shift delay.
TSBTRA071AR12017-12-22. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN. TSB - SERVICE ACTION: 2.0t & 3.3l SHIFT QUALITY LOGIC IMPROVEMENT (SA315A) - This bulletin provides the procedure to improve the logic of the Transmission Control Unit (TCU) on some 2018MY Optima (JFa) 2.0T, produced from April 19, 2017 through July 10, 2017, and some 2018MY Sorento (UMa) 2.0T and 3.3L vehicles, produced from March 23, 2017 through September 18, 2017, which may experience a shift quality concern, such as a hard downshift, upshift, and/or shift delay.
TSBTRA071A2017-12-22. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). TSB - SERVICE ACTION: SHIFT QUALITY LOGIC IMPROVEMENT (SA315A) - This bulletin provides the procedure to improve the logic of the Transmission Control Unit (TCU) on some 2018MY Optima (JFa) 2.0T, produced from April 19, 2017 through July 10, 2017, and some 2018MY Sorento (UMa) 3.3L vehicles, produced from March 31, 2017 through July 25, 2017, which may experience a shift quality concern, such as a hard downshift, upshift, and/or shift delay.
TSBTRA0712017-12-22. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). TSB - SERVICE ACTION: 2.0T & 3.3L SHIFT QUALITY LOGIC IMPROVEMENT (SA315) - CLOSED - This bulletin provides the procedure to improve the logic of the Transmission Control Unit (TCU) on some 2018MY Optima (JFa) 2.0T, produced from April 19, 2017 through July 10, 2017, and some 2018MY Sorento (UMa) 2.0T and 3.3L vehicles, produced from March 31, 2017 through July 25, 2017, which may experience a shift quality concern, such as a hard downshift, upshift, and/or shift delay.

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