Logitech MX Master 4 Repair

The Logitech MX Master 4 mouse was announced in September 2025, replacing the MX Master 3 series. The MX Master 4 introduces customizable haptic feedback, an additional side button (8 total), quieter clicking sound, and an updated surface finish.

There are two application-specific versions of the MX Master 4: the MX Master 4 for Mac and the MX Master 4 for Business.

The Logitech MX Master 4 can be identified by the model number ("M/N") MR0118 (or part numbers, "P/N") 910-007558 (Graphite), 910-007560 (Black), or 910-007559 (Pale Gray). The part number can be found printed sideways on the mouse's underside. The device's serial number is also listed there, labeled "S/N."

Design and Connectivity

• 8 buttons, including scroll wheel and gesture button
• Customizable haptic feedback
• Bluetooth Low Energy 5.1

Sensor

• "Darkfield" Laser Sensor, 200-8000 dpi range

Battery

• Rechargeable 650 mAh Li-Po
• 70 days of battery life (expected)

Dimensions:

• 2.0 × 3.5 × 5.1 inches (5.08 × 8.83 × 12.8 cm)
• 5.3 oz (150 g)

• Logitech MX Master 4
• Logitech MX Master 4 support page