The problem
Kia Motors America (Kia) is recalling certain 2017-2018 Kia Niro hybrid electric vehicles. The Main Relay within the Power Relay Assembly (PRA) may have inadequate connections between its contacts, causing increased electrical resistance.
The risk
The increased electrical resistance can overheat the rear seat which is above the PRA, increasing the risk of a fire.
The fix
Kia will notify owners, and dealers will inspect the Power Relay Assembly (PRA) for damage. If no damage is found, the main relay will be replaced. If damage is found, the PRA will be replaced. These repairs will be performed free of charge. The recall began November 23, 2018. Owners may contact Kia customer service at 1-800-333-4542. Kia's number for this recall is SC168.
Recall details
| NHTSA campaign | 18V-666 (18V666000) |
|---|---|
| Manufacturer number | SC168 |
| Manufacturer | Kia America, Inc. |
| Component | Hybrid propulsion system |
| Report date | September 25, 2018 |
| Owners notified | November 23, 2018 |
| Vehicles affected | 27,030 |
| Initiated by | Manufacturer |
Vehicles covered
Owner complaints about the fuel & propulsion system
Frequently asked questions
Is the recall 18V-666 repair free?
Yes. Kia dealers will fix the problem at no cost: Kia will notify owners, and dealers will inspect the Power Relay Assembly (PRA) for damage. If no damage is found, the main relay will be replaced. If damage is found, the PRA will be replaced. These repairs will be performed free of charge.
How do I know if my car is included?
Not every vehicle of the listed model years is affected — the recall covers 27,030 vehicles built in a certain window. Check your 17-character VIN with our VIN recall check or at nhtsa.gov/recalls.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.