Recommended Wiring Harness for a 2025 Kia K5

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Question:

Hello, I have a 2025 kia k5 and want to attach a trailer but there is no trailer t connector wiring harness for the 2025, only 2024 and below. I also dont want to splice any wires. Are there any t connectors made for other vehicles that fit the 25 k5? If not do you guys have any idea when one may be made? Please let me know. Thanks!

asked by: Vincent C

0

Expert Reply:

Hey Vincent. As of 5/8/2025 there are no plug in wiring harnesses for a 2025 Kia K5. The only option I have today is the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit item # 119250KIT. This kit uses sensors that clamp onto your K5's taillights without splicing into them. The sensors detect the current and activate your trailer's lights through the 4-way connector.

Here are some other parts you'll need to tow a trailer with your 2025 Kia K5:

Curt Trailer Hitch - Custom Fit - Class I - 1-1/4" item # C58JR

etrailer Ball Mount w/ Pre-Torqued 2" Ball - 1-1/4" Hitch - 3-7/8" Rise - 3,500 lbs item # e47DR

I recommend using the No-Drill Mount for Electrical Mounting Bracket - Short item # 18140 and the item # C42CR bracket. to secure the 4-way connector to your hitch. This will put it in an easy to reach spot and prevent the risk of it falling onto the road.

What kind of trailer are you towing?

expert reply by: Jerred H

0

Vincent C.

5/8/2025

Hi Jerred, thanks for the reply. Will the ZCI Circuit Protected Vehicle Wiring Harness definitely work for my vehicle? Just want to make sure before I purchase it. This is the trailer: https://www.harborfreight.com/1195-lb-capacity-4-ft-x-8-ft-folding-trailer-62666.html

Jerred H.

5/14/2025

@VincentC Yes, it will. The ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit item # 119250KIT is our universal option that has been used on Kia's and their wiring systems successfully for years. Since your trailer has a 1-7/8" coupler you'll need the Class I Ball Mount item # 3594, which offers a 4-inch rise and the 1-7/8" hitch ball item # 19256.

Answer 1

We have just what you are looking for! The Curt Trailer Hitch Receiver - Custom Fit - Class I - 1-1/4" #C58JR was designed specifically for your 2021 Kia K5 and is currently the only available option. This hitch has a 1-1/4" receiver and a…

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Answer 2

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 3

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 6

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Answer 7

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 8

Hi David! There are quite a few hitches offered for your 2026 Honda Odyssey, so I definitely understand wanting to know the differences. There are basically three styles available for you and I have them broken out below: Exposed Crosstube: etrailer…

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Answer 9

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 10

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 11

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 12

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Recommended Wiring Harness for a 2025 Kia K5

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