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2010 2011 BMW 5 Series Forum F10 What to do? '15 550i secondary steering battery |
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07-15-2020, 02:14 PM | #1 |
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What to do? '15 550i secondary steering battery
I've been having some shuddering and hesitation in steering on my '15 550i, along with some occasional errors. The dealer says that it's the secondary battery for the power steering that is failing and needs to be replaced and registered. Since this is a maintenance item, it is not covered by the CPO - hence $727 (!).
I called local Indy shops but they haven't even heard of this. This is rare as only applies to V8 and diesel models. I need to respond quickly. Let me know your thoughts or ideas if you have any. Thanks! |
07-15-2020, 05:56 PM | #3 |
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Ditto above. In many discussions across several F series BMW forums where the vehicle has either the auxiliary AGM battery or the 24 volt Lithium battery...many of them are NOT attached to the IBS (intelligent battery sensor)...but are charged by the main battery through a relay as well as having a charging unit for the aux battery (which is mentioned in the info you posted above from the TIS website).
The reason for battery registration for the main battery is due to the IBS’s monitoring of that battery. The aux battery is separated from the system by a relay that opens/closes...as well as being kept charged by the charging unit. If your car has the AGM battery...it may be currently a proprietary battery only sold by BMW...if so, you may have to bite the bullet on the cost of the battery...but save so of you money if you are handy enough to replace it yourself since it may not require registration (which may be an easy reach around from the dealer to take some extra cash from your wallet). Here’s some info about the aux battery’s charging controller: https://www.newtis.info/tisv2/a/en/f...ttery/GH1wlj6L
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Become a BMW CCA member! Click HERE to join and feel free to use my BMW CCA member #191509 as a referral. Last edited by Qsilver7; 07-15-2020 at 06:01 PM.. |
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07-17-2020, 03:29 PM | #5 |
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Thank you all for your input!
In the end, I struck a deal and I had the dealer do it. If I took it back I would still be on the hook for "diagnostics" ($229) and the little EPS battery itself costs $274. The dealer agreed to deduce the diagnostic fee from the total so it ended up more-less the same. |
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