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As a BMW 4 Series owner, you know that the vehicle is more than just a machine — it’s an extension of your personality. That’s why it’s so important to keep it in good working order at all times. The battery in your BMW is the heart of your vehicle’s electrical system. When it fails, your vehicle will not start.

The average lifespan of a BMW 4 Series is about 5 years. Some may last longer, some may not. It is important to note the battery in your BMW 4 Series will not fail suddenly. It will gradually decline in its ability to hold a charge over time. You should pay attention to some warning signs which will tell you when it is time for a replacement:

If you notice any of the following warning signs, bring your vehicle to our Fremont Foreign Auto repair shop for battery replacement:

  1. Your BMW 4 Series is slow to crank

If your car takes longer than usual to start, the battery may be going bad. The reason for this is a bad battery can’t supply enough power to the starter motor, which is what turns over the engine and sends it on its way. If this happens often, it’s time for a new battery.

  1. The battery light comes on

When this happens, it usually means your battery needs replacing soon. It could also mean there’s another problem with the electrical system of your BMW 4 Series. If this happens, bring it into our auto repair shop immediately so we can diagnose what’s wrong and fix it for you!

  1. Your headlights are dimmer than usual

When the alternator isn’t working properly, it can cause problems with electrical components in your vehicle — including your headlights. If they seem dimmer than usual when you turn them on at night, this could be an indicator it’s time for a new battery.

  1. Battery casing is cracked or bloated

The battery casing will begin to crack if it overheats and expands too quickly. This can happen if you’ve left your lights on or if the alternator isn’t charging properly. The casing may also swell up like a balloon if there’s excess moisture inside it—a sign that it’s leaking acid or gas. Either way, you’ll need to have the battery replaced as soon as possible.

  1. Your BMW 4 struggles to crank in cold weather

Cold weather can damage batteries, causing them not to hold their charge as well as they should. If you have recently driven your BMW 4 Series in colder weather and noticed it struggled to start up again after being parked overnight, then this could be a sign that your battery needs replacing. This problem may get worse over time, so it’s best to get it replaced sooner rather than later if you suspect that this might be the issue.


If your battery is more than five years old, or if you’ve noticed any of these warning signs, it’s time to replace it. If you’re looking for a professional battery replacement auto shop for your BMW 4 Series, contact Fremont Foreign Auto today!