Sharing is caring but caring is scaring especially if it BMW. Anyway,something to share with you guys. I had active steering warning message that appeared on my iDrive almost every alternate day especially after long hours of not starting the car. One day, my car decided to strike - cannot start. I changed the battery with Bosch S5 100 and problem solved. Few days later, the active steering warning message getting active on my iDrive - almost everyday it appears on my iDrive. Send to a BMW workshop specialist and was diagnosed with cancer at critical stage - need to perform major operation - replace the $t33ring rack! Send the car to authorised BMW dealer and told them that my ''BMW Workshop Specialist " suspected that I need to replace my steering rack. They were smiling at me and told me that 530d components normally last longer than its petrol cousin and they doubt that electronic or steering rack has anything to do with the warning message. It seems that they already aware that the active steering issue normally has nothing todo with the rack. But they told me many of them were replaced previously because they were not able to trace the actual root caused. After 2 days, l collected my car in the evening and it was confirmed that my active steering is ok although their computer reading detected problem with my steering rack - Weird. But they said my battery need to be replaced with original BMW battery . I told them that l just replaced the battery which they aware. But one of their Mechanic told me that it's a common issue among E60- active steering but the root cause has nothing to do with the steering. He advise me to drive from KL to Mallacca and the problem should be solved. If the problem still persist, he told me just replace it with original battery and he guarantee the problem will be solved. On the same day, I drove to Malaca and come back - something that I enjoy to do and I still love driving 530d which I feel it much better than my company's car-FIO 52Od (but nice to drive in city when you are not in hurry). Since then, no more active steering warning message on my iDrive. So, if anybody inform you to change steering rack, my advise is to get second opinion from Authorised BMW Dealer and perform rootcause analysis but make sure not from dealer start with A. Then they might inform you to replace the entire car.