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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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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 1-800-940-8924 for expert service.
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  • Reviews (728)
  • Q & A (0)
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  • 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 Reviews

Pollak 7 Pole to 4 Way Connector Adapter - PK12716

Average Customer Rating:  4.9 out of 5 stars   (728 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


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.


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


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


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


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.


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


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


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


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


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



Works as advertised. Thank you.

Works as advertised.
Earl - 05/07/2022


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


I thought I would receive a better quality product. The metal used to make the connector should have been a heavier gauge. The price wasn't a concern, I want a product that will last me years of use. I can't say I have the confidence it will. The connectors are flimsy. The connectors I am hooking up to is made out of better material and I would expect the connector I purchased should be of the same quality.


Worked perfectly. Solid construction.


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!!


Received the exact product I needed with no hassles!

Timothy - 03/12/2022


Item fit and functioned perfectly. Delivery was fast and on time. Great service.


This is my second one of these converter plugs from 7 pin to a flat 4 plug for a second vehicle, works great!


Quality good Fits well. Figure out how not to lose them


Nice product, well built & makes a smooth connection


Correct part, best price, delivered as promised, works as promised.


Good quality


As decribed.

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