# Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna

Nilight 51077TR is a vehicle-specific 4-pin trailer wiring harness listed for Toyota Sienna models from 2004–2010. Its plug-in connectors are intended to tap into factory wiring without cutting or splicing, then provide a 4-way flat connection for trailer signal lights.

- [Original product page](https://best-deals.pro/product/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [View offer](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Nilight
- Model: 51077TR
- Category: Cars & Motorcycles > Vehicle Accessories
- Price: 37.37 USD
- Previous price: 43.99 USD
- Discount: 15%
- Price checked: 2026-11-14T19:08:22.839Z
- Rating: 4.4 / 5
- Reviews: 266

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Listed for 2004–2010 Toyota Sienna and uses vehicle-side connectors behind the taillight housings.
- The seller describes a plug-in installation that does not require cutting or splicing factory wires.
- The 4-way flat connector is intended for trailer tail, brake-signal and turn-signal lights.
- A fitted rubber dust cover is described for protecting the connector when it is not in use.

## Pros

- Vehicle-specific plug-in connection can avoid modifying factory wiring, if the vehicle and connector locations match the listed application.
- The 4-way flat output serves common trailer signal-light connections.
- The manufacturer lists a two-year warranty.

## Specifications

### Identity
- Brand: Nilight
- Model: 51077TR
### Connector and use
- Connector type: 4-way Flat Connector
- Listed vehicle application: Trailer Wiring Harness Kit compatible with Toyota Sienna
- Cable type: Flat Ribbon
### Dimensions and installation
- Weight listed: 16 ounces
### Materials and protection
- Material listed: Copper, PVC or PE
### Warranty
- Warranty description: 2 Years Warranty

## Before you buy

- The title uses kit identifier 55580, while the model and part number are 51077TR. The application is described as 2004–2010 Toyota Sienna, and buyers should confirm the harness identifier and exact vehicle year before ordering. The listing describes a rubber dust cover, but its explicit contents list names only the harness, six zip ties and one screw, so cover inclusion is unconfirmed.

## In the box

- Custom 4-pin trailer wiring harness, quantity 1 (Included)
- Zip ties, quantity 6 (Included)
- Screw, quantity 1 (Included)
- Rubber dust cover (Check selected pack): Mentioned in the feature text but omitted from the explicit package list. Check the selected listing.

## A good fit for

- Owners of a 2004–2010 Toyota Sienna seeking a vehicle-specific 4-way flat trailer-light connection.
- Buyers who want a plug-in harness rather than cutting or splicing factory wires.

## Less suited to

- Vehicles outside the listed 2004–2010 Toyota Sienna application unless compatibility is confirmed.
- Towing setups that require a connector other than a 4-way flat.

## Customer feedback

Customer feedback highlights plug-and-play functionality and perceived quality, while fit, wiring and completeness receive mixed comments. For buyers, the fit uncertainty makes matching the stated 2004–2010 Sienna application especially important. The overall rating distribution leans positive, but ratings alone do not establish compatibility or explain individual experiences.
- Positive themes: Feedback describes the harness as easy to use with plug-and-play functionality.
- Positive themes: Some customers speak positively about perceived quality.
- Mixed feedback: Fit receives mixed feedback, with some reporting a good match and others saying it did not suit their needs.
- Mixed feedback: Wiring and package completeness also receive mixed feedback.

## Frequently asked questions

### Which vehicles is this harness listed for?
The listing specifies Toyota Sienna models from 2004 through 2010. Confirm the vehicle year and harness identifier before purchase, as the title and model fields use different identifiers.
### Does installation require cutting factory wires?
The manufacturer describes connectors that plug into existing factory wiring and says cutting or splicing is not required. The connectors are said to be behind the driver- and passenger-side taillight housings.
### What does the 4-way flat connector support?
It is intended to connect trailer tail lights, brake signals and turn signals.
### Is a dust cover included?
The feature text says the harness comes with a rubber dust cover, but the explicit package list does not name one. Its inclusion is therefore uncertain.

## Alternative options

- [MECMO 4 Pin Trailer Wiring Harness 56434 for 2019-2024 Toyota RAV4 & RAV4 Prime Hybrid, Plug-in Simple Custom-Fit T-Connector 4-Pole Flat Trailer Light Connector, Trailer Hitch Wiring for Toyota RAV4](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [MECMO 4 Pin Trailer Wiring Harness for 1989-1995 Toyota Pickup & 1995-2004 Toyota Tacoma, 55379 Vehicle-Side 4 Prong Towing Hitch Wire for Trailer Light Hook Up, Plug & Play 4 Way Flat T-Connector](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [Oyviny Replacement 55513 4 Pin Trailer Wiring Harness for Toyota Tacoma 2005-2015, T100 1994-1998, Hilux 2010-2012](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [MECMO 4-Pin Trailer Wiring Harness 56217 for 2008-2019 Toyota Highlander, for 2018-2022 Lexus RX 350/350L, Custom 4 Way Flat T-Connector Plug and Play Towing Hitch Wire for Trailer Light Connect](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [KUAFU Class 3 Trailer Hitch Compatible with 2004-2020 Sienna All Styles \| Rear 2”; Replacement for 75237 Towing Receiver Steel Black](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [Nilight 4 Pin Trailer Wiring Harness Kit 56478 Simple Fit Tow Hitch \| Vehicle Standard 4 Way Connector Custom for 2014 2015 2016 2017 2018 2019 2020 2021 2022-2024 Ram ProMaster 1500 2500 3500](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [4-Pin Trailer Wiring Harness Compatible with Toyota Sienna 2015-2020 56261](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [Nilight 4 Pin Trailer Wiring Harness Kit 56382 Simple Fit Tow Hitch \| Vehicle Standard 4 Way Connector Custom for 2018 2019 2020 2021 2022 2023 2024 2025 Honda Odyssey Harness](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [4 Pin Trailer Wiring Harness 56434 Compatible with Toyota RAV4 \| for 2019-2025 and ...](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [WeiSen 4-Pin Plug & Play Trailer Wiring Harness Fit for Toyota RAV4 06-12 \| For Trailer Taillight & Brake Turn Signal,SMT Circuitry,Towing Hitch Wire Connector,Easy To Install](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
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- [Nilight Heavy Duty 7 Way Inline Trailer Plug with 7 Gang Junction Box \| Weatherproof 12 Feet Connector Cable Wiring Harness Suitable for RV Automotives Cars](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)

## Add-ons

- [Tow Hitch Wiring Harness Connector 82824-0C150 for Toyota Tacoma 2016-2022 \| Fits Tundra 2009-2022](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)
- [VNN Class 3 Trailer Hitch Compatible with Toyota Tacoma 2016 2017 2018 2019 2020 2021 2022 2023, 2-Inch Receiver, Rear Towing Hitches Powder Coated Black](https://best-deals.pro/visit/nilight-51077tr-4-pin-toyota-sienna-trailer-wiring-harness)

## Images

![Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna — 1](https://best-deals.pro/i/fmGE4qCLgZjSDQHJ-GAFm_CZLBHDkM6wgmGNrYsBmvm9zJ8ewLxqUY5uWBVazkCf0Sjc8UAvSwOvfVwYd7zYsoEDwB5vfrGicOCDQtJAwwy2-GByPax5.jpg)

![Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna — 2](https://best-deals.pro/i/z0iH0SAF77cy1ZxyQneHaHeIUhcmfDiBhLJa1PFPo_NpQdc1I5nXJ_2vM31ac7BmhsFs_FxeVFmOqhAT0ghoM-qUgkYYVUt4QPNCw8ZFxsilKdbvmd_J.jpg)

![Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna — 3](https://best-deals.pro/i/uz75Vfl0DeqLNHmFDcr3cvG7stLlvpPQAqA-kM05QDO-vmJMhlEGogPXvBAur-e0j80Jjaoq3UdAzmlBdyMlaQsGIgQ_5Rvo3RzIq-3_1xxWw38ciPJn.jpg)

![Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna — 4](https://best-deals.pro/i/g7LXsmCEufnyaza9G8afYz1O5H0CbZ7UDzRynq3nUtpr56BqmjXF_7tJdAbJ6y3Q8OUuqGyRZqr7EtrtNR-VA4iY-QLgmGtX1glYZH3pQ58xUJI_oMjg.jpg)

![Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna — 5](https://best-deals.pro/i/A6u-qxoUSgWSr_Dza1FDrFMgpT_-mf8QEHIgNFwi7j4pVYGM9Eu3QFSrn16IrRCA9aIL2dqE-9aapgm1sVfCGdOEJQS7nKH9a3dZ40sQ0TZmQ1u2X7jh.jpg)

![Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna — 6](https://best-deals.pro/i/jCZLafd0ZfpOtri4NKxnvUGATL8LXiCc9mv61Rrq9L7lz2rwTNBUlrGDJwIi0CtQ5jWNw4TI2CyVVu99OE5LhaU9QAXlyB4vbpOVxORPU2QdOTJvRTRD.jpg)

![Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna — 7](https://best-deals.pro/i/r_m46NPjYQP-loQJwG-02hnr_wRxn4popfCGCj7kmxQ-_i2Q5P_th4CNr2beAqV58Af_c6K9i7JylblC2YdJaTY0my0h7bruvhNrHsjRbADlAmjWlQJh.jpg)