What Does High Battery Drain Mean On A BMW?

People typically drive shorter distances more frequently and with more accessories in colder weather (10degC) (battery consumers). The battery can be heavily drained by heat, heated seats, heated steering wheels, the stereo, and spotlights, among other things. People will drive 5–10 minutes to the grocery store, stop the car, go shopping for 30 minutes, and then get back in the car to repeat the cycle. When stationary at a stop sign, some newer automobiles even have a feature called engine Start/Stop that is intended to save petrol. This feature turns off the engine but leaves the other consumers on. When they go home and turn off the car, it goes to sleep after a few minutes and when they turn it on again, the notice “increased battery discharge” pops up.

It can be challenging to maintain the battery’s charge when there are so many energy consumers, especially during cold weather.

It takes a lot of electricity to drive short distances while using all of these car accessories. As a result, the battery starts to deplete to the point where the engine computer detects that its current charge start is below the necessary minimum. The automobile might start the following time, but it might not have enough time to recover until it is driven for at least 45 to 60 minutes. Due to low voltage, this might result in a torrent of fault codes flooding the vehicle computer. The accessories will eventually start to turn off in order to conserve the battery for the following start and to give the alternator time to finish charging.


  • Error Message for Increased Battery Discharge
  • BMW might not turn on.
  • Instrument Cluster in Motion
  • Electrical Irregularities
  • During idling or while moving, the car could shut off.
  • As soon as you start the car, the warning disappears.
  • Battery charge alert
  • Dashboard service vehicle icon. vehicle being raised.
  • battery discharge increases when halted
  • turned off all electronic consumers.

Possible reasons for the BMW battery drain issue

The most frequent causes of an excessive battery discharge are an aged battery, a broken IBS (Intelligent Battery Sensor), or a bad ground connection.

The battery is older than five years. Avoid holding a charge high electrical usage from a single module defective battery contact Electronic gadgets plugged into the 12-volt outlet with a faulty IBS sensor DME (digital motor electronics) / DDE faulty junction box The trunk’s malfunctioning EDC module is consuming too much current. Scanner for faulty CA (Comfort Access) modules plugged into the OBD2 port

1- Age of battery:

The normal lifespan of a BMW battery is 4 to 6 years. When starting or during driving, you can experience greater battery depletion if your battery cannot maintain a charge. You typically get a few more alerts if the battery fails. Examining the low beam or high beam while the engine is off to see whether they appear feeble is an easy check you can make. The battery can be at blame if it’s dimly lit or the automobile struggles to start. A faulty cell frequently causes a BMW battery to die, even after two years.

Be aware that the battery might not charge properly or run out over night. Make sure the smart key is not too close to the car if your BMW battery continues dying while it is parked.

IBS sensor No. 2

IBS sensor malfunction may be to blame. The negative battery terminal is where the IBS sensor is mounted.

3. A poor connection

The warning message “increased battery discharge” might also be brought on by improper battery cable connection. Make sure the battery terminals are secure by checking them. especially if you replaced the battery before getting this problem notice. Remove the battery terminals and use a battery terminal brush to clean them if they are not loose. They may corrode, resulting in the error notice about increasing battery drain. Make that the IBS sensor cable, which is attached to the negative battery cable, is checked and cleaned. A defective alternator that isn’t effectively charging the battery is another potential issue.

4- Quick journeys:

You are not allowing your battery enough time to charge properly if you just use your BMW for short excursions. The battery charge can be decreased. If so, you can either take longer journeys (at least 30 minutes by car) once a week or connect a trickle charger to the battery overnight. Driving in the city also works to let the battery charge, so you don’t need to use the freeway. Limit your use of electronic consumers like heated seats. Additionally, turn off the daytime running lights. Thus, the battery will be able to charge more quickly.

5- Lighter socket for cigarettes:

This error message may appear if an electrical gadget or a high-power charger is plugged into the cigarette outlet. Ensure that you unplug any GPS or phone chargers from the 12 volt cigarette outlet. If you have a rear socket, make sure you check it.

6- Freezing temperatures

Battery performance declines in cold weather. Additionally, you are more likely to use several consumers, such as the defroster, wipers, heated seats, etc. There is a considerable probability that you will experience the battery drain error if your BMW is powered by an old car battery.


I have seen numerous postings on the “High Battery Drain” fault notice, but none have actually identified the root of the problem. The thread that resulted.

In my instance, a “defective passenger front door comfort access tag handle carrier” is to blame for the high battery drain. I had the error message disappear when the dealership ran a test, found the cause, and replaced the part. Solution obtained: thumbs up I think there might be additional elements that could create this problem for other individuals after conducting my investigation in numerous forums.:dunno:

Please continue reading for more information:


purchased a 2007 BMW 550i in the fall of 2009. Approximately three to four weeks after I purchased the car, this notification initially appeared. Since then, the message has appeared every two to four weeks, regardless of how many miles were traveled just hours prior to the message. I took it to the dealership, where they kept it for a few days to do tests before figuring it out.

Here is a word-for-word explanation of what the dealership reported on my invoice, according to it. Although I don’t fully comprehend everything in their article, I am confident that the professionals on this site will be able to provide clarification if you guys have any queries.

The customer complains that the battery is weak and believes there is a problem with high battery drain; check and advise.

What is a BMW enhanced battery discharge reset procedure?

Since BMW believes that telling You this information is crucial, there is no way to manually reset the message. The good news is that you shouldn’t be too concerned; your automobile is merely alerting you to the fact that the battery is depleting more quickly than it is charging. Turn off any unneeded equipment, such as seat heaters and the radio, and remove any phone chargers or other devices from the cigarette outlet as the first step in resolving issue. It may take up to 30 minutes for the notice to go, therefore you should make sure you keep the engine running throughout that time. This can happen when you stop at a red light or on chilly mornings, especially in northern locations with a lot of freezing weather. If you keep seeing this and your battery is older, it may be an indication that it will soon fail, so you should start making plans to replace it.

You must resolve the issue, which is typically brought on by a bad connection, in order to clear the BMW increasing battery discharge notice. Make sure the battery terminals are securely connected by inspecting them.

What drains the battery in my BMW?

The potential causes and testing procedures for a high battery discharge in a BMW are listed below:

  • external gadgets that are plugged in
  • connected OBD-II scanner
  • Intelligent Battery Sensor for BMW
  • notorious “hedgehog” (from the climate control panel)
  • Your car’s electronics either consume too much electricity or fail to enter sleep mode.
  • defective alternator
  • dated battery

An excessive battery drain is what?

You may not understand how crucial the sort of battery you select is; we’re not just talking about AA, AAA, etc. You should have the battery that is most suited for each individual device because they all consume energy at different rates. Devices that consume a lot of energy quickly are referred to as “high drain devices.” For instance:

  • Electronic cameras
  • Mobile phones
  • Games on portable video
  • Bluetooth portable devices
  • Toys that operate through radio

How frequently you have to recharge a device can be a strong indicator of its high drain. It’s a high-drain device if a full charge doesn’t last more than a day or two.

The same batteries that low-drain gadgets use are not ideal for these devices to operate on. You wouldn’t want to mow your fields with a racehorse or enter an ox in the Derby. In general, you should utilize lithium-ion batteries for your high-drain gadgets and alkaline batteries for your low-drain devices.

A spectrum has two ends: high-drain and low-drain, it should be highlighted. The majority of devices fall in this range. There are high-drain alkaline batteries that will work if your gadget is more in the middle. Only Lithium-Ion batteries should be taken into consideration when the high-drain limit is approaching because they are made to withstand sudden, powerful bursts of energy. They’re ideal for flash photography, a few hours of gaming, or a musical afternoon.

Why does my battery deplete quickly?

There are several reasons why the battery on your Samsung GalaxyA(r) or Google PixelA(r) could be depleting quickly. Here are a few of the most typical:

  • The battery is being depleted by an excessive number of push messages and alerts.
  • The number of apps using location services is excessive.
  • There are way too many background-running applications.
  • The display is very bright.
  • Before turning off, the screen is left on for too long.
  • There is no service on the phone.
  • The operating system on the phone is dated.
  • Extreme temperature swings have an impact on both your phone and battery.
  • The battery in the phone has reached the end of its useful life.

What does the term “battery drain” mean?

Your battery losing voltage or energy is known as discharging or draining. It’s crucial to realize that if a battery isn’t being directly charged, it is constantly discharging.

Your battery can be discharged either actively or passively. This turns into an active process when you’re utilizing your battery to power gadgets in a boat or motorhome. Importantly, if your battery is left unattended for any length of time, even when there isn’t a load attached, you are inadvertently depleting it.

What distinguishes high drain from low drain batteries?

The 1.55 nominal voltage, button shape with diameters ranging from 4.8mm to 11.6mm, and heights varying from 1.2mm to 5.4mm are all shared characteristics of silver oxide batteries. Silver oxide batteries come in two primary varieties: low drain and high drain. High drain cells are made for watches with a high energy need, like those with chronometers, alarms, or lighted dial faces, whereas low drain cells are made for watches with minimal current requirements. It is advisable to just choose the identical model number that was originally shipped with the watch; you may find it etched on the battery’s face. Leading manufacturers’ watch batteries are exceptionally dependable and leak-proof. Their service life in watches ranges from 1.5 to 5 years, and their shelf life is greater than four years. Look through our large selection to locate the ideal watch battery replacement for your requirements.

Dealers & Jewelry Stores Take Notice: In the US, we are the biggest importer of Renata & Murata watch batteries. We may offer supply stores running or recurring orders, as well as shipping at any time and the best pricing available. To view the lowest pricing available to merchants only, create a dealer account!