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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
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2018 Mini Cooper
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CURT

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

Part Number: 56091
25 Reviews | 6 Questions
In Stock
$49.12
Retail:$82.95
You Save: 41%
 Custom Fit Vehicle Wiring
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2018 Mini Cooper

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Product Images

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curt custom fit vehicle wiring trailer hitch 4 flat t-connector harness with 4-pole connector
curt custom fit vehicle wiring trailer hitch plug-in t-connector harness with 4-pole flat connector
curt custom fit vehicle wiring end connector 4 flat 56091
curt custom fit vehicle wiring end connector plug-in 56091
curt custom fit vehicle wiring 4 flat plug-in 56091
curt custom fit vehicle wiring trailer hitch plug-in
curt custom fit vehicle wiring end connector 4 flat

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In Use/Installed

2013 subaru legacy custom fit vehicle wiring curt trailer hitch 4 flat t-connector harness with 4-pole connector
2013 subaru legacy custom fit vehicle wiring curt trailer hitch end connector t-connector harness with 4-pole flat
2013 subaru legacy custom fit vehicle wiring curt 4 flat plug-in 56091
2013 subaru legacy custom fit vehicle wiring curt trailer hitch 4 flat 56091
2013 subaru legacy custom fit vehicle wiring curt end connector 4 flat on a
2013 subaru legacy custom fit vehicle wiring curt trailer hitch end connector on a
2013 subaru legacy custom fit vehicle wiring curt trailer hitch plug-in t-connector harness with 4-pole flat connector
2013 subaru legacy custom fit vehicle wiring curt end connector 4 flat 56091
2013 subaru legacy custom fit vehicle wiring curt end connector plug-in 56091
2013 subaru legacy custom fit vehicle wiring curt trailer hitch plug-in on a

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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. 1-800-940-8924 to order CURT custom fit vehicle wiring part number 56091 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (25)
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CURT Custom Fit Vehicle Wiring - 56091

Highlights

  • Custom Fit for Your Vehicle: Works with your vehicle's wiring
  • Tow Without Factory Prep: 4-pole flat plug powers trailer turn, brake, and tail lights.
  • Plug-and-Play Install: T-connector plugs inline with tail lights—no wire cutting needed.
  • LED-Ready Wiring: Works seamlessly with trailers or carriers using LED taillights.
  • Simple Ground Setup: Only ground wire needs manual attach to clean metal surface.
  • Circuit Protection Built-In: Converter safeguards vehicle wiring from trailer shorts.

Features to know about

Installs Fast Without Wires to the Battery: Plug-In T-Connector

Wiring a trailer doesn’t get much simpler than this. The Curt T-Connector plugs directly in line with the vehicle’s tail light wiring—no running a power wire to the battery required. Just attach the ground wire to a clean metal surface and you’re ready to tow.

Handles Modern Lighting Setups: Works with LED Taillights

Whether your trailer or hitch carrier has standard bulbs or LEDs, this harness is ready for it. The Curt T-Connector with 4-Pole Flat Trailer Connector #56091 is fully compatible with LED taillights, so signals work correctly without flicker or error messages.

Keeps Factory Wiring Intact: Circuit-Protected Converter

This harness includes a built-in circuit-protected converter that isolates trailer power from the vehicle’s sensitive wiring. It helps prevent overloads or shorts from reaching the car’s electronics while still running all basic lighting functions through its 4-flat connector.

Comparison image showing Curt T-Connector vehicle wiring harnesses with 4-pole flat trailer connectors for trailer lighting and towing applications.

Clean, Hidden Setup: 4-Flat Trailer Connector at the Ready

Once installed, the 4-flat connector stays tucked out of sight until you need it. When it’s time to tow, just pull it out and plug in your trailer’s wiring. It gives you running lights, turn signals, and brake lights through a simple plug that looks neat and works reliably every time.

Specs

Electrical and Connectivity

  • Connector type: 4-Pole Flat Trailer Connector
  • Harness type: T-Connector Vehicle Wiring Harness
  • Compatibility: Compatible with LED taillights on a trailer or hitch carrier
  • Power source: Does not require a power wire to the vehicle battery
  • Grounding: Only the ground wire needs to be manually attached to a bare metal surface
  • Connection method: Plugs in line with the vehicle tail lights

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

Similar to Hopkins HM11143624

Installation Details 56091 Installation instructions

This Product Fits The Following Vehicles






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Customer Satisfaction Score:

Ratings & Reviews

4.9

25 reviews
5 Stars
(22)
4 Stars
(3)
3 Stars
(0)
2 Stars
(0)
1 Star
(0)
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by:
It would be better if it installed itself
by:
2010 Subaru Legacy
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
by:
Follow the installation instructions and everything goes together pretty nicely
by:
2013 Subaru Legacy
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.
by:
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!
by:
I’ve had this wiring harness about a year it was Easy to install and works as it should.
by:
The hitch went on easily and I'm very plese it and the great service I received from etrailer.com. Would buy from them again.
by:
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.
by:
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!
by:
This harness was pretty easy to connect to oem points as per instructions. I recommend this product.
by:
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.

Jon profile picture

Jon

7/20/2018

All good. Still working like a champ.

by:
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.
Jenny N. profile picture
Etrailer Expert

Jenny N.

11/19/2021

I will have our customer service team reach out to you.

by:
These guys are good. One order, problem solved. Right part, good delivery. Couldn't be happier with this group.
by:
Everything works the way its supposed to! Setup was quick and painless
by:
Works as intended. No reason to need more than a four pin on a small sedan.
by:
Plug & play, works great!
by:
2014 Subaru Legacy
Works great, installs easy!
by:
Works!
by:
2011 Subaru Legacy
Easy install. Exactly is as described.
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2014 Subaru Legacy
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2010 Subaru Legacy
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See what our Experts say about this CURT Custom Fit Vehicle Wiring

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

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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