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Introduction

Use this guide to replace the Touch ID sensor in a 2018 MacBook Air.

Note that Touch ID will not function after replacing the Touch ID sensor. The MacBook’s original Touch ID sensor is uniquely paired to the T2 chip on the logic board at the factory—and without Apple’s proprietary calibration process, even a genuine replacement Touch ID sensor from another MacBook Air won’t work.

If you replace the Touch ID sensor, you must install a paired logic board to retain Touch ID functionality.

  1. Before starting this procedure, you should disable your Mac's Auto Boot feature. Auto Boot powers on your Mac when you open the lid, and may be accidentally triggered during disassembly. Use this guide to disable Auto Boot.
    • Before starting this procedure, you should disable your Mac's Auto Boot feature. Auto Boot powers on your Mac when you open the lid, and may be accidentally triggered during disassembly. Use this guide to disable Auto Boot.

    • If your MacBook is running Big Sur v11.1 or later, disabling Auto Boot may not work. You can proceed normally, but make sure to disconnect the battery as soon as you're inside.

    • Completely power off and unplug your MacBook Air before you start. Close the display and flip the entire laptop upside-down.

    • Use a P5 driver to remove the following screws:

    • Two 7.9 mm screws

    • Two 7.1 mm screws

    • Six 2.6 mm screws

  2. Wedge your fingers between the display and the lower case and pull upward to pop the lower case off the Air.
    • Wedge your fingers between the display and the lower case and pull upward to pop the lower case off the Air.

    • Remove the lower case.

  3. Peel back the tape covering the battery connector enough to reveal the connector underneath.
    • Peel back the tape covering the battery connector enough to reveal the connector underneath.

  4. Use a spudger to slide the battery connector parallel to the logic board and out of its socket on the logic board. Use a spudger to slide the battery connector parallel to the logic board and out of its socket on the logic board.
    • Use a spudger to slide the battery connector parallel to the logic board and out of its socket on the logic board.

  5. Slide the tip of a spudger underneath the speaker cable and pry straight up to disconnect the speaker. Slide the tip of a spudger underneath the speaker cable and pry straight up to disconnect the speaker.
    • Slide the tip of a spudger underneath the speaker cable and pry straight up to disconnect the speaker.

  6. Use a T4 Torx driver to remove the three 1.4 mm screws securing the audio board cable bracket. Remove the cable bracket.
    • Use a T4 Torx driver to remove the three 1.4 mm screws securing the audio board cable bracket.

    • Remove the cable bracket.

  7. Use the flat end of a spudger to pry the audio board connector straight up and disconnect it. Use the flat end of a spudger to pry the audio board connector straight up and disconnect it.
    • Use the flat end of a spudger to pry the audio board connector straight up and disconnect it.

  8. Use the flat end of a spudger to pry the Touch ID sensor connector straight up and disconnect it. Use the flat end of a spudger to pry the Touch ID sensor connector straight up and disconnect it.
    • Use the flat end of a spudger to pry the Touch ID sensor connector straight up and disconnect it.

  9. Remove the following screws:
    • Remove the following screws:

    • Two 4.3 mm, T5 Torx screws

    • One 2.4 mm, T4 Torx screw

  10. Slide the flat end of a spudger underneath the Touch ID sensor cable to slice through the adhesive securing it to the audio board.
    • Slide the flat end of a spudger underneath the Touch ID sensor cable to slice through the adhesive securing it to the audio board.

  11. Remove the audio board.
    • Remove the audio board.

  12. Use a T3 Torx driver to remove the six 1.6 mm screws securing the Touch ID sensor and its bracket. Remove the Touch ID bracket.
    • Use a T3 Torx driver to remove the six 1.6 mm screws securing the Touch ID sensor and its bracket.

    • Remove the Touch ID bracket.

  13. Turn the MacBook right-side up and open the display.
    • Turn the MacBook right-side up and open the display.

    • Lift the Touch ID sensor sensor out of its recess and remove it.

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