How To Open BMW Trunk With Battery Disconnected? (3 Ways)

Having a dead battery can be frustrating, especially when it prevents you from accessing essential items like the trunk of your BMW. Accessing the trunk under these circumstances can seem daunting, but with the right steps, it doesn’t have to be. 

So, how to open the BMW trunk with the battery disconnected? BMW trunks can be opened in three different ways. Firstly, simply put in the manual key and unlock the trunk. Secondly, access it manually from the rear seat. Lastly, use the external power to open the trunk.

This article will cover the best ways to open your BMW’s trunk when the battery is disconnected. With these easy techniques, you’ll never have to worry about being locked out of important items in your car again.

How To Open Bmw Trunk With Disconnected Battery?

When BMW vehicles are disabled due to a dead battery, the trunk can be opened, but the process is different compared to other vehicles. 

To open the trunk of your BMW, you need a few tools, and we will look at each of the three methods steps by step. 

Tools Required

No special tools are required to open the trunk when the battery is disconnected.

  • Manual Key
  • An external power source (if needed)

Three Methods: Step-by-Step Procedure

There are three ways to open a BMW trunk if the battery has been disconnected. Let’s take a look at each one. 

#1- Using The Key 

The easiest and most straightforward way to open your BMW trunk with the battery disconnected is by using your key. In older models, manual key access to the trunk is supported. To do this, you’ll need to:

  • Remove the panel covering the trunk’s lock cylinder.
  • Insert your key into the exposed trunk lock cylinder and turn the key counterclockwise.
  • Lift and open the trunk lid. 

But what if there isn’t a key? Not to worry. The second or third options are available.

#2- Access From The Rear Seat 

If you don’t have access to your key, you may be able to access the trunk inside from the rear seat. To do this, you’ll need to:

  • Unlock the back seat and fold it forward. 
  • Fold the rear seat panel simply by pushing. 
  • Find and locate a cable connected to the trunk lid lock and pull it. 
  • Lift and open the trunk lid. 

#3- Use an External Power Source 

If none of the above options are available, you may need to use an external power source. To do this, you’ll need to:

  • Connect the external power source to the BMW’s battery.
  • Turn on the power source to restore the car’s power.
  • Once the power is restored, open the car’s door with the remote.
  • Once the door is open, open the trunk with the trunk button or latch at the bottom of the inside of the door.

Here watch the YouTube video: How to Open the Trunk Without Power.

Safety Tips

Before opening your BMW trunk with the battery disconnected, following some safety tips is important. This includes:

  • Always wear protective gear, such as gloves when handling a car’s wiring.
  • Don’t attempt to open the trunk if there is smoke coming from the car.
  • If you use your key, ensure it’s inserted correctly in the trunk lid lock. 

These simple steps will ensure you can successfully open your BMW trunk with a disconnected battery.

Read Also: 4 Of Bad BMW Intelligent Battery Sensor Symptoms[Explained]

What Should You Do To Avoid Opening A Bmw Battery Without Battery?

Owning a BMW, it’s important to ensure that the battery is in good working order and that you know how to troubleshoot it if a problem arises. Let’s look at how to troubleshoot BMW battery issues.

Check the Battery regularly. 

The battery is an important component in the operation of your BMW, and you must check it regularly to ensure that it is in good working order.

  • You should check the battery’s exterior for any corrosion or damage and the voltage levels to ensure it has the right power.
  • Check all of the battery’s cables and connectors to ensure they are properly connected and secure. Check to see that they are free of dust and debris.
  • An important step is to check the condition of the negative and positive terminals. Ensure they are free from corrosion and any signs of damage are addressed.
  • Check all of the fuses. Make sure that each fuse is in the proper location and that it is not damaged or corroded.
  • Finally, charge the battery with an appropriate charger when you fill the low power while starting your BMW. 

These are just a few steps to troubleshoot BMW batteries. It is important to properly maintain and care for your BMW battery so you can be assured that it will always start when needed. And always be prepared to take the necessary steps in an emergency.

Read Also: What Causes Bmw X5 Tailgate Won’t Lock? Try These Solutions


Here are some answers to frequently asked questions about getting into your BMW’s trunk when the battery is disconnected.

Does a BMW have an emergency trunk release?

Yes, most BMW models have an emergency trunk release handle fitted beneath the lid’s interior trim panel. This handle can open the trunk without needing a power supply.

Is it possible to lock the BMW trunk without using the battery?

Yes, it is possible to lock the BMW trunk without using the battery, but the process may differ slightly depending on the model of your BMW.

Is it dangerous to drive with a disconnected battery?

Yes, driving a BMW with a disconnected battery is dangerous because the electrical wiring won’t power the starter motor, and the vehicle won’t be able to start.

What should I do if the trunk won’t open after the power wires are reconnected?

If the trunk doesn’t open after the power wires are reconnected, then there may be an obstruction in the latch that prevents it from opening. Inspect the latch to make sure nothing is blocking it. If there is an obstruction, you may need to remove the obstruction to be able to open the trunk.

Does Opening a BMW Trunk with a Battery Connected Void My Warranty?

No. Opening a BMW trunk with a dead battery does not void the warranty as long as all the necessary precautions are taken. However, if any damage is caused to the trunk due to opening it, the warranty could be voided.


By understanding how to open  BMW trunk with battery disconnected, owners can be prepared to open their trunk in case it gets stuck after a power outage, a dead battery, or worse. 

Taking the time to learn the steps to open the trunk will help alleviate the stress in an emergency. The three ways to open the trunk without battery power are using a manual key, pulling the latch from the rear seat, and using a power jumper. 

Additionally, keeping the battery in good health and topped off with charge can help avoid emergencies, as they are more likely to occur after prolonged disuse and corrosion on the cable connections.

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