Kia Optima DL3: Rear Seat Belt / Rear Seat Belt Buckle

The buckle and tongue of different types are impossible to be latched, so check that the buckle & tongue have the same types.

Distinguish the rear side seat buckle from the center seat buckle before latching.

If foreign materials are stuck in the inside button of buckle, it may cause interference during the latching process, leading to a functional problem (for example- beverages (viscous drinks), toothpicks, sand, plastic, vinyl, metal pieces, etc.)

After latching the buckle and tongue, check the fastening force using a Push-Pull Gauge (fastening force: 3kgf or less). 7