The Battery Safety Terminal (BST) is a device which is used to minimise the risk of any electrical fire in the engine bay if the vehicle is involved in a collision. BMW have been using BST’s as part of their safety package for around 20 years; a cutaway section of the BMW device is shown below in Figure 1.
Table of Contents
How do you check BMW BST?

What is BST cable?
BST Metal detectable cable ties feature a food safe metal additive, dispersed evenly and completely throughout the entire polyamide 6.6 body of the cable tie. These cable ties have an operating temperate of -25ยฐC to 65ยฐC, and can be used as part of a HACCP process or BRC procedures.
Are battery cable terminals Universal?
Because of it’s malleability, lead battery terminals are universal and the same terminal will work for either the positive or negative battery post.
Will a BMW start after airbags deployed?

What does BMW IBS do?
On newer BMW’s you will find the Intelligent Battery Sensor (IBS). This component monitors and measures your battery performance. The software calculates your “state of charge” and “state of health” of your battery whether your vehicle is on or off.
What BMW terminal 30?
Terminal 30 Fault is used for control units operating in the driver’s absence. That applies, for instance, to the trailer module (AHM), footwell module (FRM), instrument cluster and automatic climate control module (IHKA).
Where is the negative terminal on a BMW battery?

How do you replace battery terminal connectors?

What are the three styles of battery terminals?
- The three types are:
- SAE Terminals. SAE is the standard for most automotive vehicles.
- JIS Terminals. The JIS battery terminal is similar to the SAE but smaller.
- L Terminals. L terminals consist of an L-shaped post with a bolt hole through the vertical side.
- Marine Battery Terminals.
What are the different types of battery connectors?
- Tamiya Connector.
- Deans/T Connector.
- XT60 Connector.
- Traxxas Connectors.
- Molex Picoblade Connector.
- Bullet connectors.
- JST RCY Connector.
- Balance Connector.
What is the smell when airbags deploy?
While your deployed airbag may smell smoky after a crash, this doesn’t necessarily mean there’s a fire. In fact, the components behind airbags contain small explosives that cause them to deploy quickly, often leaving a smoky smell in the air.
Is a car considered totaled if the airbags deploy?
No, deployed airbags do not automatically make a car a total loss. If a vehicle’s airbags deploy and the cost of replacing them is more, then it would be declared a total loss.
Can a car airbag go off if the battery is disconnected?
The act of disconnecting the battery will not trigger the airbags to deploy. But, the airbags can deploy with the battery disconnected, if the crash detection system has an energy reserve.
How do you test an IBS sensor?
Once the scanner is plugged in, turn the ignition on, but don’t start the engine. Scroll through the menus on the scanner, locate the DME option, and scan for fault codes. If you see “299B DME Intelligent Battery Sensor” or “002E8D DME: Intelligent Battery Sensor, signal transmission”, there is a problem with the IBS.
Can you bypass battery current sensor?
Current will bypass the battery current sensor and its readings won’t be accurate.
Where is the IBS sensor?
The IBS is a mechatronic component for monitoring the battery condition. The IBS is secured and connected to the negative terminal of the battery.
What is Terminal 50 on a BMW?
Across the line terminal 50E, the CAS switches a positive (battery voltage) at the DME control unit, signaling that the engine is to be started. Across terminal 50L, the CAS switches a positive (battery voltage) at the comfort start relay. The starter motor is switched on.
Where is terminal 30 A in a BMW?

How do you reset terminal 30?
There is no such thing as a terminal 30 reset. Try disconnecting the battery as explained in post above yours.
How do I reset my BMW after changing the battery?
- First of all, turn the ignition key of the BMW car to the accessory position once the lights and radio are on. You have to do this before starting the vehicle.
- Again, press the “Trip” button and hold until Reset appears.
- Then, press the same button for the third time.
Are BMWS positive or negative grounded?
Negative-grounded vehicle.
Can you replace BMW battery without programming?
Apart from the registration procedure, you also have to code your BMW computer. It’ll be necessary each time you replace your battery, no matter its specifications – whether your battery is similar or extremely different from your old one.
How much does it cost to get battery terminals replaced?
The average cost for battery cable battery terminal end service is between $26 and $33. Labor costs are estimated between $26 and $33. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location.
Which battery terminal do I connect first?
“Positive first, then negative. When disconnecting the cables from the old battery, disconnect the negative first, then the positive. Connect the new battery in the reverse order, positive then negative.”