iPhone 12 Pro Max Earpiece Speaker with Sensor Flex Cable

The first question people ask about this part is whether Face ID will still work afterward. The honest answer: it depends on the repair. The iPhone 12 Pro Max sensor flex carries Face ID-related parts that are paired to the phone, so new ones on a replacement flex won't do the job by themselves.

This assembly combines an earpiece speaker with the sensor flex cable for the iPhone 12 Pro Max. The listing leaves quality unstated, so it's treated as aftermarket.

When a 12 Pro Max needs the whole flex

It's for phones with a damaged top flex: the screen not dimming during calls, auto-brightness stuck, a dead earpiece, or visible tears and corrosion on the cable. If the speaker is the only fault, the speaker-only part is enough and Face ID never comes into it.

Keeping Face ID

The listing says the original components, including the flood illuminator, must be transferred onto the new flex by microsoldering. A technician without that equipment can still restore calls and sensors, but Face ID won't work afterward, so agree on which outcome is acceptable before opening the phone.

Test calls, proximity, auto-brightness and Face ID before closing the phone, so any issue is caught while it's still open.