12V battery drain issues on early production cars
- Typically appears
- 20,000+ miles
- What to inspect
- Check the 12V battery condition and ask about any flat battery history

A 2021 Kia EV6 is now 5 years old, so an average example has covered around 67,500 miles. This is the first model year of the generation · early-build cars carry the highest share of teething faults and the most recall activity, so check the service history for completed recall work. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2021 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2021 Kia EV6 is 5 years old, so an average example has covered roughly 67,500 miles. At that mileage 2 of the documented faults are already due, so check those first.
Documented onset mileage is at or below the ~68k miles an average 2021 car has covered.
12V battery drain issues on early production cars
Rear suspension bush wear causing knocking noises
Age, electronics and build-related issues that are not mileage-driven.
Infotainment freezes and software update requirements
Dashboard and trim rattles particularly around the centre console
Wind noise around frameless door seals at speed
Generate a tickable pre-purchase checklist for this exact year, mileage and variant · add photos and notes as you inspect.
Check this exact carYes, they share the same platform and have a similarly strong reliability record.
Yes, early cars had some 12V drain issues, so a health check is a sensible precaution.
Not generally, but always request a battery state-of-health report before purchase.
Minor rattles around the centre console occur but are inexpensive to resolve.