How To Bypass BMW Battery Safety Terminal? Explained!

The BMW battery safety terminal is important in any model but can often confuse drivers. It’s important to understand why the BMW battery safety terminal bypasses and how it works to avoid potential problems. 

So, why does the BMW battery safety terminal bypass? The BMW battery safety terminal bypass can be achieved by connecting the positive wire directly from the battery to the vehicle’s electrical system. Bypassing the BST sends power directly from the battery to the car’s components.

This article will explore exactly how this bypass works and its importance in providing a secure, reliable BMW driving experience.

Why BMW Battery Safety Terminals Need To Be bypassed? 

The battery safety terminal can become corrupted or damaged over time, leading to various electrical issues in the car. The BMW battery safety terminal bypass effectively avoids such problems and ensures your car runs efficiently. 

Understanding BMW Battery Safety Terminal Bypass

The Battery Safety Terminal is located in the battery’s positive connector and provides the necessary power supply to electronic systems. Its main function is to control the connection between the battery and the car. 

In case of any problem with the electrical connection between the parts, the BST shuts off the battery-positive terminal. When a problem is detected in the BST, the engine will shut off, and the car will not start. 

To avoid this problem in the first place, many BMW owners opt for a BST bypass. Removing the battery safety terminal bypass the BST and allow your car to start despite a malfunction in the circuit. 

Read Also: How To Check The BMW E38 Battery Is Recharging or Not?

How to Bypass the BMW Battery Safety Terminal?

Regarding safe battery access on a BMW, it is important to follow the proper safety procedures. But sometimes, a battery safety terminal can only get past with the correct know-how. So, if you’ve been struggling to bypass your BMW battery safety terminal, here is a step-by-step guide.

Tools Required

  • BMW scan tool (to reset codes and view/connect to the diagnostic plug)
  • T25 Torx bit (or other, depending on the model of your BMW)
  • Flathead screwdriver
  • Multi-directional wrench 
  • 4mm hex key

Step-by-Step Procedure: 

Follow the steps to bypass the battery safety terminal: 

  • Park your BMW on level ground and switch off the engine. 
  • Locate the battery terminal in the trunk area.
  • Using the T25 Torx bit, unscrew the two terminal bolts that secure the positive and negative cables. 
  • Now, unplug the two wires from the terminal. 
  • Using the flathead screwdriver, unscrew the safety terminal screw located on the side of the positive terminal.
  • Take out the safety terminal and keep it aside. You should now see four 4mm hex screws on the terminal. 
  • Unscrew the four screws using the 4mm hex key, and the battery should be exposed and ready for access. 
  • Directly attach the positive wire to the battery terminal.
  • Your bypassing is done. Close everything and give it a test ride. 
  • Finally, scan with a compatible BMW Scan Tool to remove any error code related to the battery safety terminal. 

Safety Tips: 

Always take safety precautions before doing any battery job on your car. Follow the tips: 

  • Ensure the vehicle is parked and the engine is switched off before opening the terminal. 
  • Always make sure that you unplug and remove both the positive and negative wires before unscrewing the safety terminal screws. 
  • Make sure you use the appropriate tools to complete the task correctly. 
  • Wear protective gloves and clothing when working on the battery terminal. 

Read Also: Battery Discharge Increased In BMW? (7 Reasons Why)

Benefits of BMW Battery Safety Terminal Bypass 

The BMW Battery Safety Terminal Bypass provides a reliable and secure way to get around the traditional limitations of BMW’s battery safety terminal. By allowing the bypassing of the battery safety terminal, BMW owners can enjoy greater performance and reliability from their vehicles.

Increased engine reliability 

Bypassing the BST means that if any electrical abnormality is found in the circuit connection, your car will still start without any issues. It means more reliable performance in all conditions. 

Easier installation 

Installing a BST bypass is a relatively simple process that most car owners can perform. It also does not require additional tools or parts, so you can get the job done quickly and easily. 

Improved battery life 

One of the main benefits of installing a BST bypass is that it will further preserve the life of your car battery. When the BST is bypassed, the amount of current traveling through the battery will be lower, helping to improve the battery’s overall lifespan. 

Cost-effective maintenance 

Installing a bypass on your BMW will help save you money in the long run, enabling you to avoid costly repairs in the future. It’s especially beneficial for BMW owners looking to reduce maintenance costs and keep their cars running in peak condition. 

Read Also: Bmw Battery Won’t Charge? Here’s What You Need To Know


We’ll also provide answers to frequently asked questions to help you understand the process better. 

Is Bypassing The Battery Safety Terminal A Safe Procedure?

Yes, bypassing the battery safety terminal can be safe if you follow the manufacturer’s instructions. It is important to test the connection after connecting the wire to ensure the battery is operating correctly.

Is It Necessary To Bypass The Battery Safety Terminal?

In some cases, bypassing the battery safety terminal is necessary to keep the car running. If the car is not functioning properly and the battery safety terminal prevents the car from starting, you may need to bypass it to get it running again.

What Happens If I Don’t Bypass The Battery Safety Terminal?

If the battery safety terminal is not bypassed, the car may not start or could malfunction. You may also need help with the battery, such as slow or not charging.

Can I Bypass The Battery Safety Terminal Myself?

You can bypass the battery safety terminal if you follow the instructions. You should always use a wire designed to bypass the safety terminal and test the connection after reconnecting the negative terminal.

Is There An Alternative To Bypassing The Battery Safety Terminal?

No, there is no alternative to bypassing the battery safety terminal. If your BMW has problems with its battery or a defective battery safety terminal, you must bypass it to keep it running.

Read Also: Why BMW Battery Discharged While Stopped? (Cause & Fix)


The BMW battery safety terminal bypass can be extremely beneficial, as it allows for a faster battery change and can help prevent the battery from draining or being damaged from attempted theft. 

Following the instructions provided in this article makes it possible to bypass the BMW battery safety terminal and enjoy its benefits. 

However, it is essential to ensure that all safety measures are taken to do it safely and correctly. Taking the necessary steps to maintain safety when bypassing the battery safety terminal can minimize potential risks.

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