If your e38 BMW battery cannot recharge, there are a couple of things you can do to find out why. You can either disconnect the battery from the car and try charging it again, or you can use the BMW battery charging station to check the battery’s charge level. The charging station will show the battery’s charge level and indicate when it is fully charged.
First, make sure the battery is registered to the car’s ECU. This will help your BMW perform more efficiently and ensure a longer service life for the new battery. The ECU also uses this information to control how often the alternator runs, which helps save fuel while prolonging the battery’s life.
If the battery has failed to recharge, you can visit a BMW dealership or a specialist. The battery in your car can last anywhere from three to five years, depending on its condition. The manufacturer of your BMW recommends changing the battery every three years. However, you can easily replace it yourself using an aftermarket battery, which is less expensive. Just make sure to buy one that is close to the original specifications. Then you can install it in your car yourself or take it to a BMW repair shop to replace the battery.
If your battery isn’t functioning properly, you can try a jump start on the vehicle. This will charge the battery and give you a chance to check if there are any damaged cells inside. But if it is still not charged, it will take at least a day to charge the battery completely.
If the e38 battery has been discharged overnight, remove the positive and negative cables from the battery. Usually, the positive cables connect to the module, and the negative to the positive battery cables. The male prongs on the module have different keying. You can try swapping the cables, but this is not necessary.
You can also try disconnecting the IBS (the little red wire) from the battery. You can find a good video online that will explain how to disconnect this connector. It’s possible that the IBS is the culprit for the battery to drain. If this doesn’t work, you can easily replace it by buying a replacement online.
Once you have checked the wiring, it’s time to check the battery. There may be a leak or a faulty terminal that’s causing the problem. A battery tester will give you a more accurate reading and tell you what needs to be done to solve the issue.