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  1. Custom Fit Vehicle Wiring
  2. Subaru
  3. Legacy
  4. 2011
  5. CURT
FITS 2011 Subaru Legacy
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 56091
Our Price: $43.55
You Save: 49%
Custom Fit Vehicle Wiring
Confirmed to Fit
2011 Subaru Legacy

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Shipping Weight: 0.89 lbs
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CURT Custom Fit Vehicle Wiring - 56091
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Call at 1-800-940-8924 for expert service. We are your Subaru custom fit vehicle wiring experts, and offer a great price. carries a complete line of CURT products for your Subaru Legacy 2011. Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part 56091 from CURT can be ordered online at Complete custom fit vehicle wiring installation instructions and technical support.
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  • Reviews (18)
  • Q & A (0)
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2011 Subaru Legacy - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

  • Trailer Hitch Wiring
  • 4 Flat
  • Converter
  • CURT

Quickly and easily install a 4-way trailer connector on your Subaru Legacy with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.


  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection points in rear cargo area
    • Plug in T-connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 5 amps per circuit
  • Limited 1-year warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side interior trim panels in your rear cargo area.

Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area.

It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.

Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.

Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.

Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.

Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.

56091 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details 56091 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 56091

Average Customer Rating:  4.9 out of 5 stars   (18 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter is made using SMT to ensure superior performance.


Nicole was great but service from installers sucks. I called multiples and if you didn't order from them they wouldn't help. One I even spoke to before finalizing my offer cancelled doing service.

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 11/19/2021

2013 SubaruLegacy

Literally plugs into the cars wiring harness at the brake lights. Directions are good but the video on this web site was great for seeing how things come apart. Product appears to be well made and performs perfectly.


etrailer vehichle specific videos made this trailer reciever (two person job) ,and trailer wiring harness a breeze! Will definitely be recommending etrailer recievers in the future. Thanks you for your quality!


These guys are good. One order, problem solved. Right part, good delivery. Couldn't be happier with this group.


I’ve had this wiring harness about a year it was Easy to install and works as it should.

2017 Subaru Outback Wagon

The process of ordering was clear and straightforward. I received the product within a week.

I have not installed the hitch or harness yet. The hatch looks solid and very well-built.


This harness was pretty easy to connect to oem points as per instructions. I recommend this product.


This product was the most put together plug and play Harness everything you need no searching for parts and or screws,wire ties nothing it's all included and available. Great product guy two thumbs up!

2010 SubaruLegacy

The product quality can speak for itself, but i was extremely satisfied with the turn around time. i received my package in plenty of time for a planned camping trip. Also your customer service was top notch. i got a phone call checking my address for shipping and thought it was really great that someone was actually handling my order with care and it wasn't just me and a computer. So thanks alot. I'll for sure be using this service in the future


The hitch went on easily and I'm very plese it and the great service I received from Would buy from them again.


Plug & play, works great!


Product came on time and was a perfect fit. Minimal effort to install and worked perfectly. Took maybe 15min to get it all set up and tested.

All good. Still working like a champ.
jon - 07/20/2018


Works as intended. No reason to need more than a four pin on a small sedan.



2014 SubaruLegacy

Works great, installs easy!


Easy install. Exactly is as described.

2014 SubaruLegacy



See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Does T-Connector Wiring Harness # 56091 Connect to the Battery on a 2011 Subaru Legacy
    The Curt Circuit Protected T-Connector Vehicle Wiring Harness, # 56091, does not require a power wire to the vehicle battery. It is a T-connector that plugs in line with the vehicle tail lights. Only the ground wire needs to be manually attached to a bare metal surface. I have included a link to the installation details for you to view.
    view full answer...
  • Is Curt Trailer Wiring Harness 56091 Compatible with LED Taillights
    Yes the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 56091 that you referenced is compatible with LED taillights on a trailer or in your case on a hitch carrier.
    view full answer...
  • Comparing Curt and Tow Ready Trailer Wiring Harnesses for a 2010 Subaru Legacy
    Normally when there is a choice between a powered converter and a non-powered converter I go with the powered converter. The reason is that the powered converter, in this case # 118511, gets most of the power for the trailer lights from the vehicle battery. This protects the vehicle wiring and any potential electrical problems that could occur should there be a short on the trailer wiring. Either harness will work for you but the little extra effort needed to route and connect the power...
    view full answer...
  • Will Trailer Hitch # 75673 Fit a 2011 Subaru Legacy or Outback with Factory Dual Exhaust
    I spoke with my contact at Draw-Tite and he stated that trailer hitch # 75673 will fit the 2011 Subaru Wagon (except Sport) and All Legacy models. This would include dual exhaust models. There is some heat shield modification that will need to be done so the trailer hitch will fit properly. I have included a link to the installation instructions for reference and a video showing installation on a similar model. For the 2011 Subaru Outback (except Sport), you can use Tow Ready Custom Fit...
    view full answer...
  • Recommended Trailer Hitch for 2013 Subaru Legacy
    If you do not know what trailer you are going to be towing you can still get a hitch because the trailer will require a ball mount in order to tow. For your 2013 Subaru Legacy I recommend the Draw-Tite # 36493 because the use of stabilizing straps with accessories are not a manufacturer's requirement in order to maintain the warranty like they are with the Curt hitch. Also, please keep in mind that according to the owner's manual of your 2013 Subaru Legacy the maximum you can tow is 1,000...
    view full answer...
  • Recommended Towing Package for 2010 Subaru Legacy
    For a Class III trailer hitch by Curt that is a custom fit for your Subaru Legacy sedan, you will want the Curt Trailer Hitch # C13158. To complete your towing setup, you will also need the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 56091. I have included installation instructions and a installation video of this harness on a 2011 Subaru Legacy for you to check out. Then you will need the Brake Controller 7 & 4 Way Installation Kit, # ETBC7, to complete...
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?

Info for this part was:

Employee Lindsey S
Updated by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video Edited:
Joshua S
Employee Cole B
Installed by:
Cole B
Employee Shane T
Test Fit:
Shane T

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