Recommended Wiring Harness for a 2025 Kia K5

Updated 05/14/2025 | Published 05/06/2025

Products Featured in This Question

ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit

(522)

$192.59

No-Drill Mount for Electrical Mounting Bracket - Short

(1180)

$21.57

Curt Mounting Bracket for 4-Pole Flat Trailer Connector

(817)

$5.94

Curt Trailer Hitch Receiver - Custom Fit - Class I - 1-1/4"

(22)

$208.73

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

(375)

$48.54

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

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

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.