Kia K5 problems and known issues

By CarWhere Research · Updated

The largest Kia K5 recall covers 2021–2024 models whose fuel tank check valve can fail, letting the tank expand, touch the exhaust and melt (25V794). Other K5 campaigns cover a transmission oil pump fault that can cut drive power (22V760), side curtain air bags that may not deploy properly (23V149) and a 2.5T fuel leak (21V519).

CarWhere lists 10 documented K5 issues, including 9 NHTSA safety recalls, each with affected years, powertrains, symptoms, pre-purchase checks and a source. Recall entries come from NHTSA's recall dataset on the DOT open-data portal, which may not list every campaign, so run the specific VIN through NHTSA's recall lookup.

K5 generations at a glance

2021–present K5 problems

Damaged check valve may let the fuel tank melt (recall 25V794) (2021–2024)

Safety recall
Generation:
2021–present
Years:
2021–2024
Powertrain:
Not specified in the recall

A damaged check valve can let air into the fuel tank, making it expand until it touches hot exhaust parts and melts, which can cause a fuel leak and fire. Dealers replace the check valve and inspect the tank, replacing it if damaged, free of charge.

Symptoms

  • Fuel smell under the car
  • Fuel tank appears swollen
  • Check-engine light

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 25V794 (2025-11-17) · 250,547 vehicles in the campaign

Sources: [1]

Transmission oil pump fault may cause loss of drive power (recall 22V760) (2021–2023)

Safety recall
Generation:
2021–present
Years:
2021–2023
Powertrain:
Not specified in the recall

If the transmission oil pump malfunctions, the fail-safe limited-mobility mode may not work, and the car can lose all drive power. Dealers inspect and replace the transmission as needed and update the transmission control software, free of charge. The 69,038-vehicle count is for the whole campaign, which also covers other models.

Symptoms

  • Transmission warning message
  • Sudden loss of drive power

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 22V760 (2022-10-11) · 69,038 vehicles in the campaign

Sources: [2]

Side curtain air bags may not deploy properly (recall 23V149) (2021–2023)

Safety recall
Generation:
2021–present
Years:
2021–2023
Powertrain:
Not specified in the recall

The side curtain air bags may have been installed incorrectly and may not deploy as designed in a crash. Dealers inspect and reinstall them as needed, free of charge.

Symptoms

  • No warning signs before a crash; the defect shows only when the part is needed

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 23V149 (2023-03-07) · 188,912 vehicles in the campaign

Sources: [3]

2.5T fuel pipe may leak at the fuel rail (recall 21V519) (2021–2022)

Safety recall
Generation:
2021–present
Years:
2021–2022

On K5s with the 2.5-liter turbo engine, fuel can leak at the pipe connection between the high-pressure fuel pump and the fuel rail, raising the risk of a fire. Dealers inspect and tighten or replace the fuel pipe, free of charge. The 21,575-vehicle count is for the whole campaign, which also covers other models.

Symptoms

  • Fuel smell from the engine bay

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 21V519 (2021-07-08) · 21,575 vehicles in the campaign

Sources: [4]

Rear window (C-pillar) trim may detach (recall 25V493) (2023–2025)

Safety recall
Generation:
2021–present
Years:
2023–2025
Powertrain:
Not specified in the recall

The left and right rear window trim pieces can loosen and come off, creating a road hazard for other drivers. Dealers inspect and replace the C-pillar trim assemblies as needed, free of charge.

Symptoms

  • Rear pillar trim loose, lifting or rattling

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 25V493 (2025-07-28) · 100,063 vehicles in the campaign

Sources: [5]

Steering effort may suddenly rise with Lane Following Assist (recall 21V447) (2021–2022)

Safety recall
Generation:
2021–present
Years:
2021–2022

On K5s with the 2.5L turbo engine, the rack-mounted power steering system cannot diagnose communication faults. If one occurs in a curve with Lane Following Assist on, steering assist may not adjust and steering effort can rise suddenly. Dealers update the steering software, free of charge.

Symptoms

  • Sudden heavy steering in a curve with Lane Following Assist engaged

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 21V447 (2021-06-14) · 846 vehicles in the campaign

Sources: [6]

Parking lights may flicker (recall 25V351) (2025)

Safety recall
Generation:
2021–present
Years:
2025
Powertrain:
Not specified in the recall

A software error in the Power-net Domain Controller can make the parking lights flicker, failing federal lighting standard FMVSS 108. The software is updated over the air or by a dealer, free of charge.

Symptoms

  • Parking lights flicker

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 25V351 (2025-05-27) · 82,281 vehicles in the campaign

Sources: [7]

Instrument panel display may fail (recall 26V046) (2026)

Safety recall
Generation:
2021–present
Years:
2026
Powertrain:
Not specified in the recall

A software error can make the instrument panel display fail, so it may not show the speedometer, tire pressure or warning lights. The software is updated over the air or by a dealer, free of charge. The 42,677-vehicle count is for the whole campaign, which also covers other models.

Symptoms

  • Blank or frozen instrument display

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 26V046 (2026-01-27) · 42,677 vehicles in the campaign

Sources: [8]

Occupant sensor may not detect a child seat (recall 21V164) (2021)

Safety recall
Generation:
2021–present
Years:
2021
Powertrain:
Not specified in the recall

The front passenger occupant classification and detection unit may not detect a child restraint, so the passenger air bag could deploy with a child in the seat. Dealers replace the unit, free of charge. The 142-vehicle count is for the whole campaign, which also covers other models.

Symptoms

  • Passenger air bag status light shows ON with a child seat installed

Check before buying

  • Run the 17-digit VIN through NHTSA's recall lookup (nhtsa.gov/recalls) and confirm the campaign shows as remedied
  • Ask a Kia dealer for the repair order showing the recall work was completed

NHTSA recall: 21V164 (2021-03-11) · 142 vehicles in the campaign

Sources: [9]

Theft vulnerability on models without an immobilizer (2021–2022)

Major repair
Generation:
2021–present
Years:
2021–2022
Powertrain:
All engines (key-start vehicles not factory-equipped with an immobilizer)

2021–2022 Kia K5 models built without a factory engine immobilizer were targeted by theft methods spread on social media. Kia offers a free security software upgrade that blocks the ignition when the car is locked, and a free zinc-reinforced ignition cylinder protector for added protection, both at Kia dealers. These model years are the ones the multistate immobilizer settlement lists for the Kia K5.

Symptoms

  • Damaged steering column trim or ignition cylinder
  • Vehicle starts with a mechanical key and has no push-button start

Check before buying

  • Enter the VIN on Kia's anti-theft support page (customercare.kiausa.com/SWLD) to see whether the software upgrade or ignition cylinder protector applies
  • Look for the upgrade sticker or ask a Kia dealer to confirm the upgrade by VIN
  • Push-button-start vehicles have a factory immobilizer and are not part of this program

Sources: [10][11]

Related K5 research

This page explains specific mechanical issues and recalls. Which model years drew the most owner complaints relative to the rest of the model’s history is answered in the years-to-avoid research where CarWhere publishes it.

Confirm how a K5 was built before you buy.

Engine, transmission and packages decide which of these issues apply. The CarWhere Kia build sheet reconstructs factory colors, options and packages from licensed VIN-level build data — availability is checked free, and it is $9.99 only when detailed build data is found for that VIN.

Kia build sheet by VIN

Frequently asked questions

What are the most common Kia K5 problems?

The K5's documented problems are recalls, led by a fuel tank check valve that can let the tank melt on 2021–2024 models (25V794), a transmission oil pump fault that can cut drive power on 2021–2023 models (22V760) and side curtain air bag installation errors on 2021–2023 models (23V149).

What years of Kia K5 have transmission problems?

Recall 22V760 covers certain 2021–2023 K5s, where a transmission oil pump malfunction can cause a complete loss of drive power. Dealers inspect and replace the transmission as needed and update its software for free.

Does the K5 2.5L turbo have recalls?

Yes. The 2021–2022 K5 2.5T had a fuel leak recall at the pump-to-rail pipe (21V519) and a steering software recall tied to Lane Following Assist (21V447). Both are fixed free by Kia dealers.

Is the K5 part of the Kia theft problem?

The multistate immobilizer settlement lists 2021–2022 K5 models not factory-equipped with an immobilizer. Kia offers a free software upgrade and ignition cylinder protector; check eligibility by VIN on Kia's anti-theft page.

How do I check a used K5 for open recalls?

Enter the 17-digit VIN at nhtsa.gov/recalls and ask a Kia dealer for repair orders showing each campaign was completed. Recall repairs are free no matter who owns the car.

Sources

Issue descriptions are CarWhere’s own summaries of the sources below. Repair costs are shown only where a source states them and vary by shop and region.

  1. Recall 25V794: Fuel Tank May Leak — NHTSA (via data.transportation.gov recall dataset)
  2. Recall 22V760: Loss of Drive Power — NHTSA (via data.transportation.gov recall dataset)
  3. Recall 23V149: Side Curtain Air Bags May Not Deploy Properly — NHTSA (via data.transportation.gov recall dataset)
  4. Recall 21V519: Fuel Leak at Pipe Connection — NHTSA (via data.transportation.gov recall dataset)
  5. Recall 25V493: Rear Window Trim Pieces May Detach — NHTSA (via data.transportation.gov recall dataset)
  6. Recall 21V447: Steering Assist Level May Not Adjust Properly — NHTSA (via data.transportation.gov recall dataset)
  7. Recall 25V351: Parking Lights May Flicker/FMVSS 108 — NHTSA (via data.transportation.gov recall dataset)
  8. Recall 26V046: Instrument Panel Display Failure/FMVSS 101, 138 — NHTSA (via data.transportation.gov recall dataset)
  9. Recall 21V164: Occupant Detection System Malfunction/FMVSS 208 — NHTSA (via data.transportation.gov recall dataset)
  10. HK Multistate Immobilizer Settlement: eligible models and model years — HK Multistate Immobilizer Settlement
  11. Kia Anti-Theft Support Actions (software upgrade and ignition cylinder protector, VIN eligibility) — Kia America Customer Care

More Kia tools

Independent reference compiled by CarWhere — not affiliated with or endorsed by Kia America, Kia Corporation or Hyundai Motor Group. Kia and the model names are trademarks of their owners.