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Is There Adapter for BMW Brand Cargo Box to Fit Roof Rack Top Channels  

Updated 07/06/2025 | Published 06/27/2025

Question:

Hello I have a BMW 520 liter roof box but I just traded it for a 2025 Acura mdx with factory roof rails. Would these work with the T bolts of the bmx box to mount my bmw box on the Acura? If not do you have an alternate solution? Any help appreciated Thanks Josh

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Expert Reply:

Hey Joshua, the BMW boxes are rebranded Thule cargo boxes which we do have a T-channel hardware kit adapter for them with the part # TH27PQ. Does the mounting hardware of your box match any of the brackets you see in the attached picture?

expert reply by:
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Jameson C
Thule Mounting Hardware
Thule Mounting Hardware
(click to enlarge)
Joshua J. profile picture

Joshua J.

7/2/2025

Jameson Thanks for the reply. The mounting hardware consists of an m8 T bolt that fit in a track on the rail, a knob that screws onto it and a plastic bracket that fits into a slot in the floor of the cargo box. It doesn’t look anything like that. I can send a picture of iit if it helps. Thanks Josh

Jameson C. profile picture
Etrailer Expert

Jameson C.

7/2/2025

@JoshuaJ Ahh so you already have hardware that is designed to fit crossbar top channels. Do the Acura bars have the top channels as well?
Joshua J. profile picture

Joshua J.

7/3/2025

No channels on the Acura. All of the attachments for the Acura rails use a clamp system.
Jameson C. profile picture
Etrailer Expert

Jameson C.

7/6/2025

@JoshuaJ I see what you mean, I wish we could help but we don't have a way to convert that to a compatible hardware setup.

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