Parts Needed to Install 7-Way on 2016 Toyota Sienna
Updated 01/19/2026 | Published 08/04/2024
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Question:
Do you have a 7-pin trailer wiring connector that plugs directly into a 2016 Toyota sienna harness
asked by: Brad
Expert Reply:
Hey Brad, for lighter duty vehicles like your 2016 Toyota Sienna we can help with a 7-way install but we don't have any direct plug in solutions. Instead you would need to start with a 4-way like the part # 118498 which is a custom fit for your vehicle and then convert to a 7-way from there.
If the trailer you tow doesn't have brakes a simple 7-way adapter like part # 37185 would be all that you would need.
If the trailer does have brakes instead you would need to go with the adapter part # ETBC7 with a brake controller like the p2 part # 90885.
Product Page this Question was Asked From
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Hidden
- Tekonsha
more information >
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Jameson C.
1/19/2026
Hey Brad, how did things go with adding the 4-way harness and converting it to a 7-way on your Sienna? Your update could make it easier for the next person looking to wire a similar setup.