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Pollak 7 Pole to 4 Way Connector Adapter

Pollak 7 Pole to 4 Way Connector Adapter

Item # PK12716
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Trailer Wiring
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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. Lowest 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 1-636-306-4830 for expert service.
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  • Reviews (770)
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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 Reviews

Pollak 7 Pole to 4 Way Connector Adapter - PK12716

Average Customer Rating:  4.9 out of 5 stars   (770 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


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!!!


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


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.


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


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


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


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


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


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.


Great product at a great price. Thanks etrailer!


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


Great products. Overmet expectations. Superb customer service!


it worked great

Still working good.
Richard B - 08/22/2022


Buy this to go from my 7pole connector on my truck tons 4way trailer connector. It's work good.


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


Product looks fine. Good value. Quick delivery, though to my neighbor down the street. A not uncommon situation with the carrier used.

The product works fine. Hopefully, as it gets limited use, it will continue to perform well.
Mark - 05/02/2022


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



Solid construction - works great


Just what I needed to hookup my utility trailer to my Tacoma.


Worked great for the trip with my new trailer to the shop where I had new brakes and wiring installed. Now it is in the go-bag in case I ever need to haul a different trailer.

I needed this adapter when I rented a [rental] trailer for a one-way trip. Still a fabulous accessory!
George F - 10/13/2018


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.


Works as advertised. Thank you.

Works as advertised.
Earl - 05/07/2022


After my new Tesla frame-mounted receiver/hitch was installed, the 7 tab RV plug did not interface with my old Wells Cargo Cycle Wagon 4 pole (lighting only) electrical connector. Pollak and provided the perfect solution. A one piece, durable adapter that plugs and locks in place just as the RV type plug, and provides the perfect mate to the plug on my trailer. Voila! After testing the lights and satisfying all of my concerns, a little roadtrip for us proved this product to be everything I had hoped for and just what I needed!!


Did the job works Great no problems with order or shipping.

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