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

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Product guide

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.

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.

Price

$37.37Save 15%

Reference price: ~~$43.99~~

Price checked: Nov 14, 2026

View offer

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Pros and cons

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.

Technical specifications

8 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

What to know before buying

Listing details to confirm

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.

What’s in the box

Custom 4-pin trailer wiring harness, quantity 1Included
Zip ties, quantity 6Included
Screw, quantity 1Included
Rubber dust coverCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

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.

Nilight 51077TR 4-Pin Trailer Wiring Harness for Toyota Sienna · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 266 ratings

5 stars74%74%
4 stars9%9%
3 stars6%6%
2 stars4%4%
1 star7%7%

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.
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.
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.