Best Hitch And Wiring Harness For 2025 Toyota Sienna
Updated 08/07/2025 | Published 07/11/2025
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Question:
I am looking for P@A on a trailer hitch assembly, and the 4 pin mount assembly that has a worm clamp that it shows on the install video on your web site. My vehicle is a 2025 Toyota sienna. Thank you.
asked by: Ken
Expert Reply:
Hello Ken, congrats on the new van! We do have the hitch and wiring you need for your 2025 Toyota Sienna. Here is what I recommend:
- Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C22UR
- Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C53VV
Now typically on the Siennas we have installed wiring on here, the 4-flat plug installs in the rear cargo area, and you simply run the plug out the rear hatch when you are using it. Then it stores in the cargo area when you aren't using it. It sounds like you are wanting to use a worm clamp and bracket to mount the plug next to the hitch. To do this you will need to find a way to route the plug from the cargo area to the underside of the vehicle. This is not something we have tried so I am not 100% sure if this would be possible or not. Assuming it is, you can use the following for your bracket:
- No-Drill Mount Bracket, Long # 18136
- Mounting Bracket 4-Pole Flat # 18144
Take a look at the videos I linked.
What kind of trailer will you be towing?
(click to enlarge)
Product Page this Question was Asked From
Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Trailer Hitch
- For Towing
- Class III
- 350 lbs TW
- 3500 lbs GTW
- 5000 lbs WD GTW
- 2 Inch Hitch
- 500 lbs WD TW
- Visible Cross Tube
- CURT
more information >
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on Trailer Hitch
Jesse M.
8/7/2025
Hey Ken, how did the installation go with your new van? Did the brackets and wiring setup work out for mounting the plug next to the hitch? I'm curious because it could help others looking to do something similar with their Sienna.