– Install it, perform a factory reset, and enjoy another 2-3 years of smooth 4K viewing. Have you installed this update on your KD-43X8309C? Report your experience in the comments below. For manual downloads, always visit Sony’s official support portal.

Recently, Sony rolled out a significant for the KD-43X8309C (often bundled with the v3.905 or v6.8265 series code). This is not a minor security patch; it’s a substantial overhaul affecting everything from HDR handshakes to the Android OS stability.

For owners of the , a 43-inch 4K Ultra HD Android TV released in 2015, keeping the firmware current has always been a balancing act. While newer TVs get monthly patches, this mid-range marvel from Sony’s ‘X83’ series relies on staggered, critical firmware updates.

By Tech Long Reads | Updated: 2026