Hyundai Ioniq Recall R/2018/103: Coolant May Leak Into Electric Power Control Unit, Who Is Affected And What To Do
- Urgent
- How serious
- 1 May 2018
- Launched
- 148
- vehicles in the UK
- 71C062
- Manufacturer’s campaign code
Hyundai recalled Ioniq vehicles built between 4 October 2016 and 31 March 2017. The Electric Power Control Unit (EPCU) to have some cracks in the aluminium casting which may cause the casting to become porous. The dealer will replace if found to be porous the unit. You won't usually pay for it.1
What’s Wrong
The Electric Power Control Unit (EPCU) to have some cracks in the aluminium casting which may cause the casting to become porous. The EPCU is cooled by a coolant channel and due to the porous cracks it is possible for the coolant to leak inside the EPCU unit causing the high voltage system to immediately shut down.
DVSA's Original Wording
Concern: COOLANT MAY LEAK INTO ELECTRIC POWER CONTROL UNIT Defect: The Electric Power Control Unit (EPCU) to have some cracks in the aluminium casting which may cause the casting to become porous. The EPCU is cooled by a coolant channel and due to the porous cracks it is possible for the coolant to leak inside the EPCU unit causing the high voltage system to immediately shut down. Remedy: To inspect the units with UV lamp. If found to be porous the unit will be replaced.
Contains public sector information licensed under the Open Government Licence v3.0.
The Risk
If the fault occurs, the recall notice says it could cause the casting to become porous.
The Fix
The dealer will replace if found to be porous the unit.
Are You Affected?
Ioniq built between 4 October 2016 and 31 March 2017 may be included. Hyundai estimates 148 vehicles in the UK. Enter your registration to check, then confirm by VIN with Hyundai, because not every car in the date range may be included.
Which Car Is It?
Choose the make and model so we can match recalls to your car.
What To Do Now
- Check your car by registration above, then by VIN with Hyundai.
- Book with any franchised Hyundai dealer, quoting the campaign code 71C062 or the DVSA reference R/2018/103. See how to get a Hyundai recall fixed.
- Follow the letter's instructions until the repair is done. See can you drive a car with a recall?.
Related Recalls
| Launched | Vehicle and fault | Severity | Reference |
|---|---|---|---|
| IoniqWheel nuts not tightened to correct specification | Book soon | R/2019/359 | |
| IoniqHybrid warning lamp eliminated on instrument cluster may indicate thermal damage to power relay assembly and power cable | Urgent | R/2018/297 | |
| Ioniq 5Some vehicles may have a potential issue with one module within the high voltage battery which may have been manufactured with misaligned electrodes | Urgent | R/2026/319 | |
| Ioniq AE EVSome vehicles fitted with a high voltage battery may have internal cell voltage deviation | Urgent | R/2026/159 | |
| Kona OS EVSome vehicles fitted with a high voltage battery may have internal cell voltage deviation | Urgent | R/2026/128 |
This is one of 102 Hyundai recalls in DVSA’s data. The Hyundai recall launched before it was R/2018/085 on 9 Apr 2018, for an electrical short circuit may occur inside the ABS module. The one launched after it was R/2018/104 on 1 May 2018, for steering wheel may detach. You can also see every Hyundai recall, all recalls launched in 2018 and high-voltage battery recalls across every make.
Source: DVSA recall R/2018/103, launched 1 May 2018. Data updated 15 October 2026. How we grade urgency.
Sources
- The Code does not itself say repairs are free. GOV.UK guidance says "You will not usually have to pay for any repairs or parts under a safety recall." gov.uk Checked 15 Oct 2026.