Trailer Hitch and Parts Needed to Add 7-Way Wiring Harness to 2021 Toyota Sienna

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Question:

Hi Etrailer, For our 2021 Toyota Sienna, we understand the compatible hitch is Curt C22UR. Is there plug and wiring harness that hooks into the 2021 Sienna with both round 7 pin for our small camper with brakes and flat 4 pin for our utility trailer? Thank you

asked by: John H

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Expert Reply:

We do have a trailer hitch receiver and all the parts you need in order to add a 7-way to your 2021 Toyota Sienna, though there isn't a plug-in 7-way, you will need to first add a 4-way and then install a 7-way. The exact parts you need for your '21 Sienna are the following:

- Curt Trailer Hitch Receiver # C22UR

- T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # TK69FR

- Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat # ETBC7

The installation kit includes the hardware needed to install the 7-way, and the connector does have a plug for your 7-way as well as a plug for the 4-way so you can connect either trailer. It will be exactly what you need to install a brake controller as well like the Prodigy P3 # 90195 or Curt Echo # C51180.

I have added links below to some video reviews for you to check out as well as help articles for the installation of the 7-way.

expert reply by: Kyle S

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Answer 1

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 2

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 3

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 4

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 5

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 6

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 7

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 8

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 9

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 10

Hi David! There are quite a few hitches offered for your 2026 Honda Odyssey, so I definitely understand wanting to know the differences. There are basically three styles available for you and I have them broken out below: Exposed Crosstube: etrailer…

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Answer 11

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Answer 12

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Trailer Hitch and Parts Needed to Add 7-Way Wiring Harness to 2021 Toyota Sienna

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