Why does my car battery keep running flat?

Human error is a common culprit of flat car batteries. Accidently leaving the headlights or inside dome lights on is one of the main causes of a battery dying. Most times, it’s human error but parasitic drains (internal lights remaining on when they shouldn’t) can cause the battery to drain just as quick too.

Is it OK to leave a car with a flat battery?

However, even disconnected a battery will eventually discharge! The leading cause of death for lead acid batteries is leaving them discharged for long lengths of time. Discharged batteries will sulfate, and are at risk of freezing, either of which can permanently destroy a battery.

Why does MY BMW battery keep going flat?

Since Day One, the battery will go flat if I leave the car sitting for more than a few days. Two different BMW shops have been unable to diagnose the problem. The battery that came with car and a new one needed to be replaced because of so many deep discharge cycles.

Do you need to change the battery in a BMW?

There are few things your BMW will require of you to maintain its longevity then — changing your oil, replacing air filters and other general service tasks. But one thing that does the most to ensure your car will run smoothly is taking care of your BMW’s battery.

What to do if your BMW battery keeps draining?

Two different BMW shops have been unable to diagnose the problem. The battery that came with car and a new one needed to be replaced because of so many deep discharge cycles. I installed a battery cut-off switch to save the third battery and make sure the car will start when I want it to.

Where do you find the battery in a BMW?

The procedure of battery replacement can be divided into 9 steps: First turn the ignition off and remove your key. Then locate your battery. Where is the battery in a BMW? You will usually find it inside your trunk — either on the trunk floor or on the right side of the trunk.

When did the BMW 5 series battery go flat?

In Jan 09, the battery was going flat often. Since then, the battery has been changed 4 times, alternator changed twice and an electrician has checked the drainage system but i tried starting the car yesterday after a new battery was fitted on Thursday 31st Dec 09 and it was flat. I dont know what to do now. Help.

Why does MY BMW 550i battery keep going down?

A simple lamp that stays on for some reason can draw a battery down overnight. I have 2008 550i and have been having the same exact issues with my car as well as with the BMW service center. They replaced my battery after much complaining by me and out of “good faith”.

Can you change the battery in a BMW?

In short, you cannot just change a battery, there is a specific procedure that must be followed in order to do it successfully. Ben Amen at our shop explains: The car must be off and key out of the ignition.

How long does it take to charge a BMW battery?

This 5 minute operation just resulted in what will be 3 weeks of the customer not having a car, and AAA coughing up a heap of $$. The BMW electrical system has gotten extremely complex, mainly due to the fact that they aren’t just cars anymore.