- Engine / equipment
- Hyundai Ioniq and first-generation Kia Niro (hybrid, plug-in and electric)
- Period mentioned
- 2016–2022
- Symptoms
- In the morning the car will not start or switch on because the 12 V battery is flat, sometimes even after charging overnight. On the electric versions, the charge port sometimes does not lock and charging is impossible.
- Possible cause described
- Hidden consumers (charge management, door contacts, infotainment) drain the auxiliary battery; the exact cause is not confirmed and software and hardware updates are mentioned. On the electric Ioniq before the 2019 facelift, the small motor that locks the charging connector jams.
- Check for the garage
- Measure the 12 V battery and its standby drain; ask about software updates; if the connector does not lock, use the emergency release and replace the lock motor.
- 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.
12 V battery running flat on the Ioniq and Niro
Sources are not verified in real time and no entry confirms that your car is affected.
Has this happened to you?
Anonymous answer, no personal data.
Frequently asked questions
How much does it cost to repair this fault?
No verified estimate; ask the garage for a quote.
A rough figure from the original database, not an up-to-date quote.
Calculate estimateHow is it checked?
Measure the 12 V battery and its standby drain; ask about software updates; if the connector does not lock, use the emergency release and replace the lock motor.
What are the symptoms?
In the morning the car will not start or switch on because the 12 V battery is flat, sometimes even after charging overnight. On the electric versions, the charge port sometimes does not lock and charging is impossible.
Which cars and years does it affect?
- Brands
- Hyundai, Kia
- Engine / equipment
- Hyundai Ioniq and first-generation Kia Niro (hybrid, plug-in and electric)
- Period mentioned
- 2016–2022
Taking it to a garage?
Models with this entry
- Hyundai Ioniq2016–2022
- Kia Niro (I)2016–2022
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- Hard starting from the starter-motor freewheel (i10 II)Hyundai
- Electrical connections, automatic gearbox and timing belt on the Hyundai AccentHyundai
- Brake-light switch and fluid leak in the ABS module on the Carens IIIKia
- Warning light and braking affected by software on the e-SoulKia
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