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Dell Precision 15 bottom base assembly dark finish no USB-C port

DELL

DELL Precision 15 7510 7520 New Bottom Base Assembly No USB-C 3K8M9

SKU CH-9QQN-WNBSD

Bottom base assembly with smart card slot for Precision 15 7510 and 7520 laptops lacking USB‑C

  • Genuine Dell OEM replacement ensures exact fit for Precision 15 7510 and 7520
  • Designed specifically for models without USB-C port prevents installation mismatch
  • Includes Smart Card slot maintaining original security functionality
  • Supplied with battery bay spring latch so reassembly is complete
  • New condition part guarantees full structural integrity and reliability

Dell Precision 15 Bottom Base Assembly

This genuine Dell OEM bottom base assembly replaces the lower chassis on Precision 15 7510 and 7520 laptops that were built without the optional USB-C port. It restores structural integrity and includes the Smart Card slot along with the battery bay spring latch. The part carries Dell number 3K8M9 and is supplied new.

Installation requires full laptop disassembly

Fitting this base assembly means removing the motherboard, display assembly, keyboard deck, cooling system and all internal modules from the original chassis before transferring them to the replacement part. The process demands patience, an organised workspace and the correct screwdrivers; a common error is forgetting to disconnect every antenna and flex cable before lifting the board, which can tear delicate ribbons.

Compatibility limited to non USB-C Precision 15

This base fits only Precision 15 7510 and 7520 units that left the factory without the optional USB-C port; systems equipped with that port use a different moulding and will not accept this part. Buyers who need a base for a USB-C equipped model or for any other Dell series cannot use this assembly.

Highlights

  • Genuine Dell OEM replacement ensures exact fit for Precision 15 7510 and 7520
  • Designed specifically for models without USB-C port prevents installation mismatch
  • Includes Smart Card slot maintaining original security functionality
  • Supplied with battery bay spring latch so reassembly is complete
  • New condition part guarantees full structural integrity and reliability

Specifications

BrandDell

Questions about this item

How can I confirm the bottom base assembly is correctly installed on my Precision 15 7510?

After fitting the assembly, verify the battery bay spring latch engages securely and the chassis aligns flush with the palm rest; power on the laptop and check that the Smart Card slot is recognised in Device Manager.

What components come with the 3K8M9 base assembly and what must I source separately?

The package includes the bottom base assembly with integrated Smart Card slot and the battery bay spring latch; you must reuse or purchase the motherboard, heatsink, battery, SSD, memory and all screw kits separately.

Which Dell Precision 15 models does part 3K8M9 fit?

This base assembly fits Precision 15 7510 and 7520 laptops that do not have the optional USB-C port; it is not compatible with USB-C equipped variants of either model.

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