How Do You Fix a BMW Battery Discharge? (Full Process)

If your BMW battery keeps dying, it’s likely due to a parasitic draw. This is when your car’s electrical system is drawing power from the battery even when the car is turned off. The most common cause of a parasitic draw is a faulty alternator or starter.

If you have a multimeter, you can check for a parasitic draw by setting it to the “amps” setting and attaching the positive lead to the positive terminal of the battery and the negative lead to the negative terminal. If there’s a draw, you’ll see a reading of 0.5 amps or more. To fix this, you’ll need to take your car to a mechanic who can diagnose and repair the car battery problem.

how do you fix a bmw battery discharge

If your BMW battery has discharged, there are a few things you can do to fix it.

Step 1First, check the battery terminals to make sure they are clean and free of corrosion. If they are dirty, clean them with a wire brush.
Step 2Next, check the positive battery cables for any damage or fraying. If you find any damage, replace the cables.
Step 3Finally, check the charging system to make sure it is working properly. If everything looks good, charge the battery and try starting the car again. You are not boring if you read the another text.

How Do You Fix a BMW Battery Discharge?

If your BMW has been sitting for a while, you may find that the battery has discharged. This can happen if the car wasn’t driven for a long period of time, or if it was left in a hot garage. There are a few things you can do to fix this problem.

First, try charging the battery with a standard household charger. If this doesn’t work, then you’ll need to purchase a new battery from your local BMW dealer. Once you have the new battery, install it according to the manufacturer’s instructions.

If your BMW still won’t start after replacing the battery, then there may be another issue at hand. Check all of the fuses and relays to make sure they’re not blown. You can also check the starter motor and alternator to see if they’re working properly.

What Causes BMW Battery Discharge?

Batteries are discharged for a variety of reasons.

One Common Reason

One common reason is when the battery is left unused for long periods of time. This can happen when a car is stored for extended periods or when it’s not driven often enough to keep the battery charged. Also, a car battery can charge your phone.

Another Common Reason

Another common cause of battery discharge is excessive heat exposure. Batteries can overheat from being used too frequently, from being stored in hot climates, or from other factors like engine overheating. Improper charging can also lead to battery discharge. So, know the types of battery charging.

If a battery isn’t charged correctly or isn’t getting enough power while driving, it will eventually run out of juice.

Last Reason

Finally, faulty electrical components can place a strain on the battery, causing it to drain faster than normal. If any lights or accessories are staying on after the car is turned off, this could be indicative of an electrical issue that needs to be addressed.

How Can I Prevent BMW Battery Discharge?

If you own a BMW, you may be wondering how you can prevent battery discharge. After all, a dead battery is the last thing you want to deal with! Fortunately, there are some simple steps you can take to help keep your BMW’s battery healthy and prevent it from dying.


Make sure you’re regularly starting and driving your car. If your BMW sits for too long without being used, the battery will slowly lose its charge. So even if you’re not using your car for long drives very often, start it up at least once a week and let it run for a while.

This will help keep the battery charged and prevent it from discharge.


Avoid short journeys where the engine doesn’t have time to fully warm up. This can put a strain on the battery and cause premature wear.

If possible, try to combine errands into one long journey so that your engine has time to reach its optimal operating temperature.


Get your BMW serviced regularly and have the charging system checked periodically. A faulty alternator or other problem with the charging system can cause batteries to discharge prematurely.

By getting regular service on your BMW, you can help ensure that everything is in good working order and reduce the risk of battery problems.


Invest in a quality Battery charger such as CTEK or NOCO Genius chargers designed specifically for trickle charging automotive batteries safely over extended periods of time.


These types of chargers maintain voltage levels below 14 volts which significantly reduces gassing off of water within lead acid cells, therefore reducing maintenance requirements.

Even if left connected permanently, they will not overcharge or damage batteries. Lastly, don’t forget about proper ventilation! Batteries give off hydrogen gas during normal operation which is highly explosive.

Good ventilation helps disperse these gases and prevents dangerous accumulation. Following these simple tips will go a long way toward preventing BMW battery discharge and keeping your car running smoothly for years to come!


BMW batteries are designed to last for many years, but they can occasionally discharge. First, try charging the battery with a standard charger. If that doesn’t work, you may need to replace the battery.

If your BMW battery is draining, there are a few possible explanations. It could be a problem with the charging system, a faulty battery, or a parasitic draw. If you suspect your BMW battery is draining, the first thing you should do is check the charging system.

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