Lenovo 4XC1D51445 laptop spare part WWAN Card

The Lenovo WWAN Card 4XC1D51445 is a PCIe M.2 mobile broadband module engineered for ThinkPad laptops to provide high-speed cellular connectivity. Based on a Quectel SDX24 EM120R-GL 4G LTE CAT12 design with receive diversity, the card supports mobile data access with downlink speeds up to 600 Mbps and uplink speeds up to 150 Mbps. It installs into a standard PCI Express M.2 slot and is intended to maintain reliable internet access for users who require network availability while traveling or working remotely.

Advantages

This WWAN card delivers fast mobile broadband performance optimized for cellular networks, improving download and upload throughput compared with older modules. Receive diversity helps maintain signal stability in varying conditions, and the standard PCIe M.2 interface allows straightforward installation in compatible ThinkPad models. The module’s compact form factor and industry-standard interface make it a practical upgrade to add or restore mobile data capability to a laptop.

Suitable for

• Professionals who need mobile internet access while traveling
• Remote workers requiring reliable cellular backup connectivity
• Field technicians and sales staff using cloud services on the go
• Users upgrading or repairing ThinkPad WWAN functionality

Key specifications

• Form factor: PCI Express M.2 module
• Cellular standard: 4G LTE Category 12
• Downlink speed: up to 600 Mbps
• Uplink speed: up to 150 Mbps
• Receive diversity for improved signal reliability
• Designed for integration with Lenovo ThinkPad systems

How to use

Power off the laptop and remove the battery or disconnect power according to the device service manual. Locate the M.2 WWAN slot on your ThinkPad, remove any existing module or blanking screw, and insert the WWAN card into the M.2 connector at a slight angle. Secure the card with the retaining screw and reconnect any antenna cables to the appropriate connectors. Reassemble the laptop, power it on, and install or enable the necessary drivers and firmware through the operating system or Lenovo support resources to activate mobile broadband functionality.

Recommendations

Use a compatible data SIM card from your mobile operator and ensure your device firmware and drivers are up to date. Verify carrier frequency support for your region before deployment. For optimal performance, keep antenna connections secure and consult your ThinkPad’s hardware compatibility list to confirm model support.