bing tracking image
  1. Trailer Wiring
  2. Pollak
  3. Wiring Adapters
  4. Single-Function Adapter
  5. 4 Flat
  6. Plug Only
Pollak 7 Pole to 4 Way Connector Adapter

Pollak 7 Pole to 4 Way Connector Adapter

Item # PK12716
Our Price: $8.71
You Save: 60%
Trailer Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.2 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Quickly and easily convert a 7-pole, RV-style connector to a 4-way, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell. Great Prices for the best trailer wiring from Pollak. Pollak 7 Pole to 4 Way Connector Adapter part number PK12716 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (817)
  • Q & A (0)
  • Photos
  • Why etrailer?

Pollak Trailer Wiring - PK12716

  • Wiring Adapters
  • Single-Function Adapter
  • 4 Flat
  • Plug Only
  • 7 Round - Blade
  • Pollak

Quickly and easily convert a 7-pole, RV-style connector to a 4-way, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell.


  • 7-Pole RV connector to 4-way flat adapter
    • Promotes quick and easy conversion of 7-pole, RV-style connector to 4-way flat connector
    • Allows 1 vehicle to tow either campers or boat trailers without electrical brakes
    • Connects Ground, Left Turn, Right Turn and Stop circuits
  • Tethered cap for protection from sand, dirt and moisture
  • Non-corrosive nylon shell and insert


  • Application: Vehicles with 7-pole connectors
  • 1-Year limited warranty

This adapter will make the two trailer connectors pictured below work together.

7-Way socket
7-Pole Connector Socket on vehicle
4-Pole plug
4-Way connector on trailer

12-716 Pollak 7-Way to 4-Way Connector Adapter
Replaces 37358

Customer Satisfaction Score:

Customer Reviews

Pollak 7 Pole to 4 Way Connector Adapter - PK12716

Average Customer Rating:  4.9 out of 5 stars   (817 Customer Reviews)

Quickly and easily convert a 7-pole, RV-style connector to a 4-way, flat connector with this RV connector adapter. Adapter has a non-corrosive nylon shell.


Everything worked out well. On time and fits perfect. Attach hitch setup and my new Ridgeline.
It comes with a 2" inch receiver and I have a full compliment of 1.25. stuff from my previous car. All from etrailer i must admit!
so I needed the 2-1.25 reducer, a good lock, and the 7-4 reducer for my goodies!
Thanks for the grest service

great use it a lot
Ralph - 08/23/2021


Received the replacement item in record time. I will check out the ability to allow the ML350 to light the LED equipped trailer.


Continues to work as advertised!
Gary - 01/01/2023


Local Porsche dealer had been unable to get this for months for my Macan.
etrailer had it in stock for immediate shipping, and at a more reasonable price.


This will work on my trailer but need a plug that will fit in here so I can plug the 7 way pole into it.

I am happy to locate the plug that you need, however I was uncertain of what you are looking for. Are you looking to add a 7 way to your trailer?
-- Etrailer Expert Jenny N - 02/02/2023


Just what I needed to convert from 7 to 4 way; simple.


Pins on the four pin connection of the adapter were too close together and had to be pried apart with a screwdriver for it to fit in the connector on the trailer. Trailer has successfully plugged into numerous other connectors so I know the problem was the 4 pin connection on the adapter itself. Was able to make connection eventually.

I will have our Customer Service team reach out to you.
-- Etrailer Expert Jenny N - 03/04/2022


Superior quality materials and workmanship on the actual hitch, BUT I am surprised a 7-pin trailer connector will not fit the flange on this hitch!!!


This was the product I need for my vehicle 2015 Honda Pilot and was not hard to put in with just a few tools and about 2 hours. It is well worth the money and looks just like the factory installed. Thank you for a great product.


Good price. Works good, does what its made to


Need this since the factory connector on our 2020 Infiniti QX80 only has the 7 Pole connection. Works great! Stays firmly in place.


Works great, no problems.


My connector adapter that I had for at least five years disappeared. Called James at etrailer and he sorted me out quickly with a replacement that fits my 2016 TDI Touareg TDI. Plugged it in and it works just great.


Works great.


Once I got the receptacle for my 2021 VW ID.4 I needed the convert. This is retained nicely by the door on the receptacle so that it does not fall off enroute.


You need this adapter to go from the seven pole RV type plug to a four pin flat trailer wiring harness


I love this Pollak 7 pole to 4 way connector adopter good quality and at a reasonable price I would highly recommend this product to everyone looking for an adopter like this one


just what i needed - thanks!


Now I can use 7 round or flat 4 trailers on the same truck.


Great place to find parts at reasonable prices for the value, great quality, easy to use website and delivered on time. Highly recommend!


Fits perfectly, does the job!


Although I am commenting on this product, I actually would like to comment on the following products. I purchased a brake system, tow bar, base plates and wire harness from etrailer. All of my orders were filled in a timely manner. When I reached out for technical assistance, the advisors were readily accessible. All of the products were installed by me. All of the products were very easy to install by using the video and instructions.


Fast delivery and part arrived in perfect condition. Thank you!


Easy install. Works well. Recommended.


Great product at a great price. Thanks etrailer!


Great products. Overmet expectations. Superb customer service!

Show More Reviews

See what our Experts say about this Pollak Trailer Wiring

< Previous
123. . .16

Do you have a question about this Trailer Wiring?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Joe V
Installed by:
Joe V
Employee Randy B
Installed by:
Randy B
Employee Ryan G
Installed by:
Ryan G
Employee Mike L
Expert Research:
Mike L
Employee Sarah L
Expert Research:
Sarah L
Employee Patrick B
Expert Research:
Patrick B
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Reno H
Expert Research:
Reno H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Andrew K
Video Edited:
Andrew K
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Tyler C
Written by:
Tyler C
Employee Nicholas E
Test Fit:
Nicholas E
Employee Alan C
Video by:
Alan C
Employee Zach D
Video by:
Zach D
Employee Wilson B
Updated by:
Wilson B

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924