KNOWN FAULTS · Kia

Known faults for the Kia Niro (II).

2022–2026 · Hybrid / Plug-in hybrid / Electric

Sources are not verified in real time and no entry confirms that your car is affected.

3 known faults with sources

Engines: 1.6 GDi Hybrid (Hybrid) · 1.6 GDi Plug-in Hybrid (Plug-in hybrid)

Applies if: Kia US bulletins for cars built from June 2022 to February 2023; confirm by VIN.

Applies if: Only the gearbox bulletin (TRA106): built from 14/6/2022 to 12/12/2022; confirm by VIN.

Dual-clutch gearbox not engaging second gear and 12 V lithium battery overcharging (Niro II hybrid)Gearbox

Engine / equipment: Second-generation Kia Niro hybrid and plug-in hybrid with the 6-speed dual-clutch gearbox
Period mentioned: 2022–2023
Symptoms: Fault light and code P074A73 (second gear will not engage); on the hybrid, loss of power with “Check hybrid system, stop safely”, hybrid-system, service and charging warning lights and beeping for about ten seconds.
Possible cause described: Kia technical bulletin TRA106 (February 2023) for model-year 2023 Niro hybrids and plug-in hybrids built from 14/6/2022 to 12/12/2022: the clutch actuator and gearbox control unit earth bolts are tightened and the gearbox software is updated. In addition, service campaign SC335 (February 2025, superseding ELE318/SA553) updates the battery management software on Niro hybrids built from 21/6/2022 to 6/2/2023, because the 12 V lithium battery can overcharge (code P1BB2) and reduce power.
Check for the garage: Read codes P074A73 and P1BB2 and ask Kia by VIN whether bulletin TRA106 and the battery update have been applied.
Cost cited in the source: Free under warranty or the service campaign.A rough figure from the original database, not an up-to-date quote.

Engines: Niro EV (Electric)

Applies if: Only cars built from 11/7/2022 to 24/1/2024 (US bulletin).

Coolant leak from the loose electric water pump hose on the Niro EVCooling

Engine / equipment: Niro EV (II) electric
Period mentioned: 2022–2024
Symptoms: A "refill coolant" message on the dashboard and a heater that warms less and less; sometimes drops of fluid under the front.
Possible cause described: The hose from the electric water pump to the high-voltage battery comes loose at its connector, because the retainer clip was fitted horizontally, and leaks coolant under the bulkhead. Kia fits an improved hose with the clip rotated 90° (bulletin ELE332, April 2024, for Niro EVs built from 11/7/2022 to 24/1/2024).
Check for the garage: Do not open the coolant reservoir when hot. It is a high-voltage car: at a qualified garage, have them check the electric water pump hose connector.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Engines: Niro EV (Electric)

Applies if: Kia US bulletin for cars built from 4/1/2022 to 29/3/2023; confirm by VIN.

Integrated charging control unit (ICCU) that stops charging on the second-generation Niro EVHigh-voltage battery

Engine / equipment: Second-generation Kia Niro EV
Period mentioned: 2022–2023
Symptoms: Slow or no charging on a household socket or AC wallbox (it does charge on fast chargers); “Check electric vehicle system” or “Stop vehicle and check power supply” messages and the fault light.
Possible cause described: The ICCU combines the on-board charger and the converter that charges the 12 V battery. Kia technical bulletin ELE298 (September 2023) covers poor or no AC charging on model-year 2023 Niro EVs built from 4/1/2022 to 29/3/2023: depending on the stored codes (DC/DC converter or charger), the ICCU is replaced.
Check for the garage: Try charging on AC as well as on a fast charger, read the codes and ask Kia by VIN whether bulletin ELE298 has been applied.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.