Will The Thule Motion 3 Roof Box Fit On My 2025 Lexus RX350h?
Updated 08/07/2025 | Published 07/11/2025
Question:
I have a 2025 Lexus RX350h. I have decided on a new Thule Motion 3XL box and prefer to mount on Lexus OEM cross bars. How well does this work? Is there enough clearance under the bars for the Motion 3XL clamps to allow easy install and removal? Are adjustments needed to prevent interference with the RX350h and rear tail gait? I hate to spend the money on Thule bars to get more clearance if not needed but I dont want to buy the OEM bars if it turns out there are clearance or other issues. FYI - I realize the Thule bars provide options to mount more stuff but this is not important to me. I really only plan to mount the box on the bars and take it off once or twice a year. Think winter skiing and a summer vacation.
asked by: Ken
Expert Reply:
Hey Ken,
The Thule Motion 3 Roof Box, # TH87PN, mounts to most factory crossbars, along with the aftermarket options. However, you would need to measure and make sure the crossbar spread on the factory rack is enough to accommodate. Since it is a wide variety you should be good but the crossbar spread requirements for that roof box are 21-13/16" - 36-9/16" apart. Most roof racks will fit into that, but I recommend double checking. I am not entirely sure the dimensions of the OEM roof rack, but you really only need an inch or 2 of clearance for install and removal.
I believe the factory rack will work just fine for you. I would just recommend seeing if the Lexus dealership can get you an idea of where it will sit on the vehicle, and the dimensions.
Product Page this Question was Asked From
Thule Motion 3 Rooftop Cargo Box - 18 cu ft - Black Glossy
- Roof Box
- Aero Bars
- Factory Bars
- Round Bars
- Square Bars
- Extra Long Length
- High Profile
- Extra Large Capacity
- Dual Side Access
- Black
- Thule
more information >
Continue Researching
- Search Results: price match
- Search Results: thule motion xl
- Search Results: thule motion
- Shop: Trailer Hitch
- Shop: Thule Motion 3 Rooftop Cargo Box - 18 cu ft - Black Glossy
- Shop: EcoHitch Stealth Trailer Hitch Receiver - Custom Fit - 2"
- Video: Checking Out the Thule Motion 3 Rooftop Cargo Box
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: etrailer Anti-Rattle Hitch Collar for 2" Hitch Receivers
- Shop: Side Window Vents
- Shop: Trailer Wiring
- Shop: Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Putco Element In-Channel Window Visors - Chrome - 4 Piece
- Shop: Replacement EasySnap Mounting Hardware for Thule Time Travel ES Series Cargo Boxes
- Article: Rooftop Cargo Carriers
- Q&A: Will Yakima SkyBox NX XXL and Thule Motion 3 Roof Box Fit 2023 Mazda CX-9 Carbon Edition Crossbars
- Q&A: Largest Thule Cargo Box Fit for Volvo XC-90 That Will Not Interfere With Opening Hatch
- Q&A: Roof Rack and Thule/Yakima Roof Cargo Box Recommendation for a 2020 Toyota 4Runner
- Q&A: Comparing Yakima SkyBox and SkyBox NX Roof Cargo Boxes
- Q&A: Height Difference Between Front/Back & Center of SkyBox NX 18
- Q&A: Correct Size Yakima SkyBox for a 2017 Toyota RAV4
- Q&A: Premium Roof Box Option for a 2018 Toyota Highlander with Factory Roof Racks.
- Article: How to Measure for Trailer Hitch Drop
- Article: Which Roof Rack Fits Your Vehicle? Depends on Your Roof
Nick S.
8/7/2025
Hey Ken, How did it work out with the Thule Motion 3XL box on your Lexus OEM cross bars? Did you find the clearance was enough for easy installation and removal? I'm curious because it could really help others in a similar situation!