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Service bulletins for the 2021 Kia Forte

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.

By type

By component

By trouble code

By topic

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
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.
TSB_TRA1092024-07-18. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: IVT OIL PRESSURE SENSOR REPLACEMENT: This bulletin provides information to replace the Intelligent Variable Transmission (IVT) Oil Pressure Sensor (OPS) on some 2018-2024MY vehicles listed on page 3 equipped with IVT. The affected vehicles may exhibit a malfunction indicator lamp (MIL) illuminated on the instrument cluster with DTCs P084500, P084600, and/or P0867XX present with no drivability concerns due to a failed IVT oil pressure sensor.
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.
TSB_TRA102_R12023-07-05. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: IVT SOFTWARE LOGIC IMPROVEMENT AND/OR IVT REPLACEMENT - This bulletin provides the procedure to update the Transmission Control Module (TCM) software logic and, if necessary, replace the Intelligent Variable Transmission (IVT) assembly on certain 2019-2021MY model vehicles listed in the chart below, which may exhibit an MIL ON with the DTC(s) listed below and a lack/delay in acceleration due to transmission slippage.
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.
TSB_TRA1022022-05-04. Service bulletin. POWER TRAIN. TECHNICAL SERVICE BULLETIN: IVT SOFTWARE LOGIC IMPROVEMENT AND/OR IVT REPLACEMENT - This bulletin provides the procedure to update the Transmission Control Module (TCM) software logic and, if necessary, replace the Intelligent Variable Transmission (IVT) assembly on certain 2019-2021MY model vehicles listed in the chart below, which may exhibit an MIL ON with the DTC(s) listed below and a lack/delay in acceleration due to transmission slippage. To correct this concern, if necessary, apply the improved software logic to the CVT system using the KDS ECU Upgrade function as described in this bulletin and replace the IVT assembly.
SC199_TSB_R12021-12-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. VOLUNTARY EMISSIONS SERVICE CAMPAIGN: IVT SOFTWARE LOGIC IMPROVEMENT AND/OR IVT REPLACEMENT (SC199) - 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 was previously referred to as SA424 or ELE 200.) This bulletin provides the procedure to update the Transmission Control Module (TCM) software logic and, if necessary, replace the Intelligent Variable Transmission (IVT) on certain 2019-2021MY vehicles listed in the chart below. The affected vehicles may exhibit the illumination of MIL with the DTC(s) listed below in addition to a lack of acceleration or delay in accelerating due to transmission slippage.

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