Why does the Kia Sorento battery drain quickly even when the vehicle is parked overnight in Pakistan?

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Why does the Kia Sorento battery drain quickly even when the vehicle is parked overnight in Pakistan?

Many Kia Sorento owners in Pakistan have experienced situations where the battery is completely drained after the vehicle is parked for just one night. What could be the reasons behind this frequent battery drain? Are there any known issues with the infotainment system, smart key, o r sensors staying active even after the engine is off? Could local conditions like extreme heat, dust, o r frequent short-distance driving be contributing to the problem? Owners facing similar issues are encouraged to share their experiences, diagnostics, and possible solutions.

Talha Kyanii asked on 10 Sep 2025 15:52:08 pm

1 Answer

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Gari Master - on 10 Sep 2025 15:53:53 pm

Common Causes:

Parasitic Battery Drain:
Some Sorento units suffer from minor electrical components e.g. interior lights, infotainment systems, o r ECU modules remaining powered even after the car is turned off. This slow drain can kill the battery overnight.

Smart Key & Proximity System:
The Smart Key system may continuously search for the key fob’s presence, especially in close quarters like small garages o r apartments, causing battery drain even when parked.

Faulty Alternator o r Diode:
A malfunctioning alternator may appear to work fine but fails to fully charge the battery—or worse, drains it when the engine is off.

Infotainment Glitches:
Some owners report the infotainment screen stays dimly lit o r the system doesn’t shut down fully, especially after software bugs o r updates.

Environmental Stress Dust, Heat:
Excessive heat especially during summers in Pakistan and dust can increase internal resistance within the battery, accelerating discharge.

🧰 Solutions and Tips from Owners in Pakistan:

Disconnect aftermarket accessories dashcams, lights, alarms when parking for long periods.

Perform a parasitic draw test at a trusted mechanic to identify if any module o r relay is drawing excess power.

Use the “Battery Saver” feature in infotainment settings if available.

Park further away from your house key to avoid constant Smart Key communication.

Regularly clean battery terminals to prevent poor electrical contact.

💬 Real Owner Example 2020 Sorento:

Battery kept dying overnight. Turned out the radio unit wasnt shutting off properly due to a software glitch. Dealer reset the infotainment software—problem solved.