Expandable intervertebral fusion implants, system, and methods. The expandable intervertebral implant (10) is capable of being installed inside an intervertebral disc space to maintain disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. The implant may include a central drive assembly (16) configured to control left and right side assemblies. The expandable intervertebral implant (10) may be configured to transition from a collapsed configuration having a first width and a first height to an expanded configuration having a second width and a second height.