Item Description Spare part number
Broadcom BCM943228HMB 802.11abgn 2x2 Wi-Fi + BT 4.0 Combo Adapter (Intel models only) 731550-001
(17) WWAN module
HP lt4112 LTE/HSPA+ Gobi 4G Module 704031-001
HP hs3110 HSPA+ Mobile Broadband Module 723895-001
RTC battery
(18) For use in models with AMD processors 683601-001
(19) For use in models with Intel processors 721532-001
(20) Memory modules (PC3L-12800, 1600-MHz, DDR3L)
8-GB 693374-001
4-GB 691740-001
2-GB 691739-001
(21) Optical drive (includes bracket, bezel, and screws)
Blu-ray ROM DVD±RW SuperMulti DL Drive (Intel models only) 721527-001
DVD±RW SuperMulti DL Drive 721529-001
DVD-ROM drive 721528-001
(22) Hard drive
1-TB, 5400-rpm (Intel models only) 676521-001
750-GB, 5400-rpm 634250-001
500-GB, 7200-rpm 703267-001
500-GB, 5400-rpm, 683802-001
500-GB, 5400-rpm, hybrid (8-GB SSD) (Intel models only) 732000-001
320-GB, 5400-rpm 645193-001
(23) Service door 721536-001
Computer major components 21