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  6. Plug Only
Pollak 7 Pole to 4 Way Connector Adapter

Pollak 7 Pole to 4 Way Connector Adapter

Item # PK12716
Our Price: $9.39
You Save: 66%
Trailer Wiring
Shipping Weight: 0.2 lbs
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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.
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  • Reviews (902)
  • Q & A (0)
  • Photos

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   (902 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


It works, it doesn’t have indicator lights so it doesn’t make my Rivian think I’m towing unless I actually am. The cap is difficult to remove as it’s recessed into the unit, overall it does the job.


This adapter plugs in to the OEM receptacle without any excessive effort and the flat 4 pin connector on my utility trailer also plugs into the adapter without any excessive effort. As a bonus there is a cover for the 4 pin side of the adapter to protect it the elements when not in use.


The trailer connector was easy to use and worked as advertised with no problems.



Still operating like new. Great product.


Exactly what I wanted, received in good shape and on time!


Best brake controller. Very easy to install and use.


Does the job. No issues, made well.


Fit perfectly on my 2020 Sprinter trailer plug in. It adapted my 4 prong flat connector for my bicycle carrier lights


This Pollak 7 Pole to 4 Way Connector Adapter is exactly what I needed and works great. I just used it a couple days ago, and after having it for over a year, it's just as reliable as day one. I highly recommend it.


First time buying a tow bar. Great experience with Jesse at errailer. etrailer videos are excellent.


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!


I have bought several items from etrailer that are high quality, affordable and sometimes not available in my area.


Easy to plug in and remove. Works great.


Good quality and the connections are snug and won’t come out too easily.


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.

Etrailer Expert

Jenny N.


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?


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.


Just what I needed at a good price.


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.


Just what I needed. Perfect fit.


Super easy to install and use.


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.


Good quality. Works great.


rear were scratched, front had hazey spots where sliding back and forth during shipping. I like the fit ,and look. maybe some of the damage will polish out.very expensive for such shipping damage.


Great product


Very well made adaptor, perfect fit in my Ram 1500 factory seven blade socket. Completely solved a problem I had with the truck's spring loaded socket cover breaking wires on 4 pole plugs. As always, good price and fast shipping from

Norm C.


Very tough adapter. Its seen a lot of dutty on different trailers and still working great. Im adding a couple more to my next big order.

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