Sony ULT Wear WH-ULT900N Left Ear Detection Sensor Flex Cable OEM Replacement Parts

This is the original OEM left ear detection sensor flex cable for the Sony ULT Wear WH-ULT900N headphones. The proximity sensor detects when the headphones are on your head and automatically pauses audio when removed. A direct replacement for a failed sensor causing auto-pause to stop working or constant false detection.

• Brand: Sony (OEM Original)
• Condition: Grade A - Excellent
• Fits Models: Sony ULT Wear WH-ULT900N

Key Features:

• Genuine OEM pulled part, tested and fully functional
• Flex cable number 400399-062115, T=0.15
• Curved arc shape designed to mount inside the left speaker housing
• FPC ribbon tail connector for direct board connection
• Fixes auto-pause failure, constant false detection, or wear sensor errors
• Direct fit for WH-ULT900N left ear cup housing

What's Included:

• 1 x OEM Sony WH-ULT900N left ear detection sensor flex cable (400399-062115)

This repair requires left ear cup disassembly and soldering to reconnect the FPC connector. This is an advanced repair recommended for experienced technicians only.

If you prefer not to repair it yourself, we also offer a mail-in repair service:
https://www.joesge.com/pages/repair-service-sony-headphones