
BMW ABS Wheel Speed Sensor Troubleshooting
If your BMW ABS, brake, DSC, DTC, or ASC lights come on, along with a message on the iDrive screen reminding you to get your BMW s
A problem BMW owners may face is that the car will not start after an accident. This problem is often caused by the BMW Battery Safety Terminal (BST sensor) fault, mounted on the positive terminal.
In this guide, we will show you how to install a BMW battery safety terminal kit on eBay and reset the BMW airbag light which comes on when the BST sensor fails.
BST sensor is often confused with the intelligent battery sensor (IBS), which is mounted on the negative terminal.
If you are stranded on the road and can't start your BMW, check to make sure the battery's positive cable is not loose. If it loses, it means that the BST ignited and disconnected the positive.
Keep in mind that a basic code reader can not clear BMW airbag codes.
CAUTION! This fix is not recommended.
If the BST sensor exploded (ignited), it SHOULD be replaced. Some BMW owners decide to bypass the BST sensor by cutting the wires to the sensor and installing a resistor. This allows you to clear the airbag light but disables a key safety feature.
Two small wires that go to the BST sensor (near battery positive terminal) are shorted with a resistor to bypass the BST sensor. A 2-ohm resistor is installed at the end of the wires bypassing the BST sensor. This will emulate a working BMW sensor, and the airbag light codes are reset using a BMW scanner.
When you install a BMW BST bypass sensor, you remove a safety feature and increase the chances of a fire if you get involved in an accident. You can replace the sensor yourself.
In the past, it would cost anywhere from $500 to $900 to replace the BMW battery safety terminal. This is why some BMW owners would bypass the BST sensor and connect the positive cable directly to the battery positive terminal.
By deleting the BMW BST sensor, you will be disabling a safety feature of your BMW. Today you can get a BMW BST repair kit on eBay for a fraction of the original prices.
Another solution is to remove the BST from a used BMW and install it on yours. You need to make sure that the BST is not from a BMW involved in an accident.
BST sensor mounts at the end of the battery positive cable and is part of the battery positive clamp that attaches to the battery post.
It is designed to disconnect the battery when the car is involved in an accident.
BMW introduced the Battery Safety Terminal in the early 2000s.
Yes, but we don't recommend deleting the BMW BST sensor. If you decide to bypass the BST sensor and are involved in an accident, the battery will stay connected, increasing the chance of a fire or explosion caused by a battery short.
By YOUCANIC Automotive Experts Published on: Thursday, February 8, 2018. |