{"nhtsa_id":10126430,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-12-22","date":"2017-11-16","document_id":"TSBTRA071A","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"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.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10126430-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2017/MC-10126430-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10126430","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"KIA","model":"OPTIMA","year_from":2018,"year_to":2018,"match":"exact","vehicle_ids":["2018_kia_optima"]},{"make":"KIA","model":"SORENTO","year_from":2018,"year_to":2018,"match":"exact","vehicle_ids":["2018_kia_sorento"]}],"as_of":"2026-10-19","note":"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.","attribution":[]}