IsItAGoodCar

Common Problems with the
2016–2018 Hyundai Ioniq (Hybrid/PHEV)

We've identified 3 known issues that can affect the 2016–2018 Hyundai Ioniq (Hybrid/PHEV). 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

The 2016–2018 period has 2 more issues than the Hyundai Ioniq (Hybrid/PHEV) average across all year periods.

All Known Issues

Clutch Actuator Fluid Leak

SeriousGearbox & Transmission

An internal leak in the hydraulic clutch actuator can lead to an electrical short and is a known fire risk. Most affected cars were recalled.

Most affected: Hybrid and PHEV

Estimated cost: £0–£1,200Affects: 2016–2018Often appears around: 20,000-50,000 miles

Typical symptoms

  • •Hybrid system warning light
  • •Jerky gear changes
  • •Fluid visible under the car

What to inspect before you buy

  • ✓Check recall status for "Clutch Actuator"
  • ✓Inspect the actuator area for oily residue

12V Battery Drain & Deep Sleep Bugs

ModerateElectrics & Electronics

The auxiliary 12V battery can drain if the car is left for several days. On earlier models, this was often due to the car failing to enter a "deep sleep" mode, sometimes exacerbated by frequent Bluelink app pings or third-party tracking apps.

Most affected: Early Hybrid and PHEV models

Estimated cost: £120–£200Affects: 2016–2019Often appears around: Age-related

Typical symptoms

  • •Car completely unresponsive
  • •Remote locking fails
  • •Clock resets
  • •12V battery dies if HV battery is below 20%

What to inspect before you buy

  • ✓Age and health of the 12V battery
  • ✓Presence of a "Battery Reset" button (on newer models)
  • ✓Software version of the BMC

DCT Hesitation & Shudder

ModerateGearbox & Transmission

The 6-speed DCT can feel hesitant or "shudder" when pulling away, particularly in cold weather or stop-start traffic.

Most affected: Hybrid and PHEV

Estimated cost: £300–£1,500Affects: 2016–2022Often appears around: 30,000-60,000 miles

Typical symptoms

  • •Delay when pressing the accelerator
  • •Jerky behavior at low speed
  • •Unpleasant vibration during take-up

What to inspect before you buy

  • ✓Perform several low-speed starts from cold
  • ✓Check for gearbox software updates in the service history

Buying Tips for the 2016 Hyundai Ioniq (Hybrid/PHEV)

  • ✓Check for the "Battery Reset" button on 2019+ facelift models, which allows self-jump-starting from the hybrid battery
  • ✓Verify all recalls (Main Power Relay and Clutch Actuator) have been completed by a dealer
  • ✓Test the DCT for smoothness at low speeds; it should be more direct than a Prius CVT but can be jerky if cold
  • ✓Inspect the boot for dampness, which can affect the 12V battery or hybrid modules
2019 Hyundai Ioniq (Hybrid/PHEV)

Browse 2016–2018 Hyundai Ioniq (Hybrid/PHEV) in our Directory

View MOT history, registration data, and reliability scores for 2016–2018 Hyundai Ioniq (Hybrid/PHEV) vehicles.

View 2016–2018 Directory

Other Hyundai Ioniq (Hybrid/PHEV) Year Periods

2016–201820192020–2022

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