What drains the battery in a Subaru?
Your Subaru's battery is a critical component that powers everything from starting the engine to running the electronics in your vehicle. However, like any car, a Subaru's battery can drain unexpectedly, leaving you stranded. Understanding the common causes of battery drain can help you prevent issues and keep your car running smoothly.
Common Causes of Battery Drain in a Subaru
There are several reasons why your Subaru's battery might drain. Some are related to user habits, while others stem from mechanical or electrical issues. Below are the most common culprits:
- Leaving Lights On: Forgetting to turn off your headlights or interior lights is one of the most common reasons for a drained battery. Many modern Subarus have automatic lights, but if this feature is disabled, it’s easy to overlook.
- Parasitic Drain: Even when your car is off, certain systems like the clock, alarm, and onboard computer draw a small amount of power. If there’s a fault in the electrical system, this parasitic drain can become excessive and deplete the battery.
- Faulty Alternator: The alternator charges the battery while the engine is running. If it’s not functioning properly, the battery won’t recharge, leading to frequent drains.
- Extreme Temperatures: Both hot and cold weather can affect battery performance. In cold weather, the battery’s chemical reactions slow down, reducing its ability to hold a charge. In hot weather, the battery fluid can evaporate, damaging the internal structure.
- Short Drives: Frequent short trips don’t give the alternator enough time to recharge the battery fully, especially if you’re using power-hungry features like the air conditioning or heated seats.
- Old or Worn-Out Battery: Over time, batteries lose their ability to hold a charge. If your Subaru’s battery is more than three to five years old, it may be time for a replacement.
How to Prevent Battery Drain
To avoid the inconvenience of a dead battery, follow these tips:
- Turn Off All Electronics: Always double-check that lights, wipers, and other electronics are off before leaving your car.
- Drive Regularly: If you don’t drive your Subaru often, consider taking it for a longer drive at least once a week to keep the battery charged.
- Inspect the Battery: Regularly check the battery terminals for corrosion and ensure they’re tightly connected.
- Test the Battery: Have your battery tested during routine maintenance to ensure it’s holding a charge properly.
- Address Electrical Issues Promptly: If you suspect a parasitic drain or notice dimming lights, have your Subaru inspected by a professional mechanic.
When to Seek Professional Help
If your Subaru’s battery continues to drain despite taking preventive measures, it’s time to consult a professional. At Kevin’s Autos, we specialize in diagnosing and repairing electrical issues in all makes and models, including Subarus. Our experienced technicians can identify the root cause of the problem and get you back on the road quickly.
Don’t let a drained battery disrupt your day. Contact us at Kevin’s Autos for expert advice and reliable service!
Frequently Asked Questions
What is the average life of a Subaru battery?
between 3-5 years
Subaru batteries usually last between 3-5 years, but this is variable depending on the type of battery, driving habits, weather conditions, and more.
What is draining my car battery when it's off?
Faulty Electrical Components: Malfunctioning parts, such as a faulty alternator or a short circuit, can cause excessive power draw, leading to battery drain. Leaving Lights or Accessories On: Accidentally leaving headlights, interior lights, or other accessories on can quickly drain the battery.
How do I stop my Subaru battery from draining?
Solutions 1. Buy the best battery you can, consider upgrading to a group 34 battery (not mentioned in video). 2. Don't leave anything on/open. 3. Charge your battery every few months. 4. Drive with headlights on. See why: How to Stop Your Subar... Please like and subscribe if you found this interesting or helpful.
Why is my car battery dead every morning?
“Electrical devices or lights left running, a defective charging system or alternator, and extreme weather are some common reasons but maybe it's just time to get a new battery.”
What vehicle accessories would drain the battery?
Eight Silent Car Battery Drainers
- Headlights left on.
- Interior light left on.
- Accessory socket plug-ins.
- Key fob.
- Extreme hot or cold temperatures.
- Corrosion.
- Aftermarket car stereos.
- Car alarms.
Can you solve battery drain problem?
Limit internet connectivity and location access - Minimising mobile data, WiFi, Bluetooth, location services when not needed can help conserve battery. Turn on Airplane mode when mobile data isn't required. Also avoid battery draining apps like cameras and games. Don't keep lots of apps running in the background.
What Subaru models are being draining battery?
According to the Subaru battery settlement website, the Subaru vehicles in the lawsuit settlement include the 2015-2020 Subaru Outback, 2015-2020 Subaru Forester, 2015-2020 Subaru Legacy sedan, 2015-2020 Subaru WRX, and 2019-2020 Subaru Ascent 3-Row SUVs.
Why does my car battery keep dying when I don't drive it?
Your battery has a parasitic drain
A parasitic drain can occur when there's a short in the electrical system or when too many electronics and car accessories are connected to the car. Even if the car is turned off, there may be a constant drain on the battery.
How to keep a Subaru battery charged?
Keep It Charged
To avoid this situation, it's best to use a battery maintainer or trickle charger if you're not going to use your Subaru for an extended period. These devices help keep your battery healthy and prevent the drain caused by modern vehicles' electronics even when parked.
How can I tell if my alternator is draining my battery?
Symptoms of a Bad Alternator
- Illuminated battery dashboard light.
- Low or abnormally high reading on the voltage gauge while driving (if equipped)
- Repeatedly dead batteries.
- Dim or overly bright lights.
- Underpowered or malfunctioning accessories (windows, radio, seat warmers, etc.)
