TSB PS493 — Kia Service bulletin

PS493 is a service bulletin on file with NHTSA for 3 Kia models, 2010 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.

What the bulletin says. TSB: DEFOGGING LOGIC ? NORMAL OPERATION, DISABLING, AND ENABLING - Starting with 2010MY, all Kia vehicles, except Rio (JB), incorporate a defogging logic to prevent the interior windows from becoming excessively fogged. Depending on the specific model, the HVAC control head…

NHTSA's own summary of the document, quoted from the public manufacturer-communications file.

1Document filed
3Vehicles named
1Model year

Vehicles and model years PS493 names

VehicleModel years
Kia Optima 2010
Kia Sedona 2010
Kia Sportage 2010

Every document filed under PS493

Document IDFiledType
PS493 March 21, 2017 Service bulletin

What PS493 covers

Visibility & wipers — the component vocabulary NHTSA files this communication under.

← All Kia Optima TSB years TSB lookup by model

Questions buyers ask

What is TSB PS493?

PS493 is a service bulletin filed with NHTSA by Kia, covering 3 Kia models across the 2010 model years. NHTSA's summary reads: TSB: DEFOGGING LOGIC ? NORMAL OPERATION, DISABLING, AND ENABLING - Starting with 2010MY, all Kia vehicles, except Rio (JB), incorporate a defogging logic to prevent the interior windows from becoming excessively fogged. Depending on the specific model, the HVAC control head…

Which vehicles does PS493 cover?

NHTSA's file names Kia Optima (2010); Kia Sedona (2010); Kia Sportage (2010). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.

Is TSB PS493 a recall, and is the repair free?

No. PS493 is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.

How do I get the full text of PS493?

Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under PS493, its date, and NHTSA's own summary from the public file.

Data updated 2026-08-20 from NHTSA's public records

Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under PS493. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.