WiFi Bluetooth Airport Card BCM94331PCIEBT4AX - MacBook Pro Unibody

In this review the focus is on the BCM94331PCIEBT4 Airport wireless card as a direct replacement for MacBook Pro Unibody models from Early 2011 to Mid 2012. It is aimed at users whose internal 802.11n WiFi or Bluetooth 4.0 stopped functioning and who need a board-level replacement that matches Apple identifying numbers. The bottom line: this card is the practical fix for owners of A1278, A1286 and A1297 machines who want to restore native WiFi and Bluetooth without third-party adapters.

Key Features

• Direct replacement: Designed to match Apple APN 661-6510 and PPN 607-8958 so it fits MacBook Pro Unibody Early 2011 to Mid 2012 models without modification.
• Integrated WiFi and Bluetooth: Combines 802.11n WiFi with Bluetooth 4.0 on a single board to restore both wireless functions at once.
• Model compatibility: Specifically compatible with MacBookPro8,1, MacBookPro8,2, MacBookPro8,3 and MacBookPro9,x variations used in A1278, A1286, A1297 chassis.
• OEM-style identifiers: Uses BCM94331PCIEBT4AX/BCM94331PCIEBT4 part numbering to simplify parts matching for repairs.
• Plug-in repair: Replaces a broken or defective internal card so users can avoid external dongles and retain original antenna routing and Bluetooth performance.

Who It's For

This card is for technicians, hobbyists, and MacBook Pro owners who are comfortable opening a Unibody laptop and replacing an internal board. It is especially useful when the internal 802.11n WiFi or Bluetooth 4.0 has failed and the goal is to restore the machine to its original wireless capabilities.

It is not for users with later MacBook Pro models or those seeking newer WiFi standards such as 802.11ac or WiFi 6; buyers requiring upgraded wireless performance beyond the original specification should consider other modern solutions or external adapters.

Pros & Cons

Pros

• Matches Apple identifying numbers for straightforward compatibility with the listed Unibody models.
• Restores both Bluetooth 4.0 and 802.11n WiFi in one replacement board, removing need for external devices.
• Fits A1278, A1286 and A1297 MacBook Pro models from Early 2011 to Mid 2012, covering common Unibody variants.

Cons

• Does not provide newer WiFi standards such as 802.11ac, so it will not increase wireless speed beyond original 802.11n limits.

Specifications

Product	AirPort Wireless Bluetooth 4.0 card
Chipset / Model	BCM94331PCIEBT4 / BCM94331PCIEBT4AX
Compatible Mac Models	MacBook Pro Unibody A1278, A1286, A1297 (Early 2011 - Mid 2012)
Wireless Standard	802.11n WiFi
Bluetooth	Bluetooth 4.0
Apple Identifiers	APN 661-6510, PPN 607-8958

Our Verdict

The BCM94331PCIEBT4AX Airport card is a sensible, value-minded replacement for owners of Early 2011 to Mid 2012 MacBook Pro Unibody machines who need to restore original WiFi and Bluetooth functionality. It is not a performance upgrade beyond 802.11n, but for compatibility and convenience it is the right choice for repairs that require an internal, Apple-style replacement.

Frequently Asked Questions

Will this card fit my MacBook Pro A1278?
Yes, it is listed as compatible with MacBook Pro 13" Unibody A1278 models from Early 2011 to Mid 2012.

Does it support Bluetooth 4.0?
Yes, the board includes Bluetooth 4.0 alongside 802.11n WiFi.

Will it provide faster WiFi than the original?
No, this card restores the original 802.11n capability; it does not add newer standards like 802.11ac.