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Service bulletin TSB-ENG166

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 id10109840
Published by NHTSA2017-08-02
Manufacturer's numberTSB-ENG166
Manufacturer's date2017-04-25
NHTSA componentELECTRICAL SYSTEM:STARTER ASSEMBLY; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

NHTSA's summary

TSB: SERVICE ACTION: HYBRID STARTER GENERATOR (HSG) PULLEY NUT INSPECTION AND/OR HSG REPLACEMENT (SA289) - This bulletin provides the procedure to inspect the Hybrid Starter Generator (HSG) pulley nut and, if necessary, replace the HSG assembly on certain Optima JF HEV/PHEV vehicles with a production range from May 31, 2016 to November 22, 2016, which may exhibit a loose pulley nut.

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

Electrical system, Alternator, Starter

Vehicles listed
KIA OPTIMA2017

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

Other bulletins for the same vehicles and component
TSBTRA072A_R22018-03-13. Service bulletin. TSB - SERVICE ACTION: INHIBITOR SWITCH - REPLACEMENT (SA317A) - This bulletin has been revised to include additional information. - This bulletin provides the procedure to replace the inhibitor switch on some 2017MY Optima (JFa), Sorento (UMa), Optima Hybrid (HEV), Optima Plug-in Hybrid (PHEV), Sportage (QL), Forte (YD), and Sedona (YP), and some 2016-2017MY Optima (JF) vehicles, equipped with a front wheel drive 6-speed transmission, which may experience the following concerns: ? Malfunction Indicator Lamp (MIL) ON with DTC P0705 - Transmission Range Sensor (TRS) Circuit Malfunction (active or history) ? CAN-related DTCs (For both Hybrids: CAN DTC C2243); ? Intermittent no crank/no start ? Erratic or harsh shifting; ? EPB and Hold lights illuminated intermittently; ? ?Key OFF? indicated after placing the selector lever into the ?P? position and depressing the Start/Stop button.Note: When this condition occurs, the ?P? position is not indicated on the instrument cluster.