You can replace the battery in BMW 5 E60 by yourself, but in any case it needs to be adapted in a computer program that controls self-diagnosis. If the capacity and type of the battery is changed, the machine must also be encoded.
If the battery is not adapted, the car will certainly be able to go, but due to the outdated data in the power control unit, there may be reports of errors such as "Rechange battery" or other symptoms of malfunctioning, such as excessive current, battery/generator failure, malfunctioning of the other car system, etc. This may eventually lead to another replacement of the battery, so it is better to adapt it as soon as it has been delivered.
