Flat battery? Could be IBS lead (battery cable with sensor)
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Joined: Mar 2009
Posts: 98
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From: Southampton UK
My Ride: 2008 530d M sport
For everyone here having battery problems.....maybe you should get the bdealer to check the "IBS lead" as I had two batteries in a short period and sent it back under warranty both times and it turned out to be that lead.
It is basically an earth strap on the battery with a sensor and this is what causes the high rate of discharge warning on the i-drive and battery is chrging but the drain of the battery is faster than the charge holding inside th battery and it causes a small short and this drains th battery by not making the car go to sleep properly causing a battrey drain.
Ive got a 2005 530i M sport and this was happening to my car.... The battery just went flat over night for no reason.
The fault was the IBS lead which got moist or detriorated over time and caused the sensor to give the "high rate of discharge" warning on the i-drive....
I am sure the IBS lead is a lot cheaper than a new battery. It is a known common fault with the E60 but i am sure the dealers will charge you for a new battery and then if it happens again like it did to me, as the fault reoccured then it is likely to be the IBS lead
It is basically an earth strap on the battery with a sensor and this is what causes the high rate of discharge warning on the i-drive and battery is chrging but the drain of the battery is faster than the charge holding inside th battery and it causes a small short and this drains th battery by not making the car go to sleep properly causing a battrey drain.
Ive got a 2005 530i M sport and this was happening to my car.... The battery just went flat over night for no reason.
The fault was the IBS lead which got moist or detriorated over time and caused the sensor to give the "high rate of discharge" warning on the i-drive....
I am sure the IBS lead is a lot cheaper than a new battery. It is a known common fault with the E60 but i am sure the dealers will charge you for a new battery and then if it happens again like it did to me, as the fault reoccured then it is likely to be the IBS lead
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Joined: Jan 2009
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From: Fort Lauderdale, FL
My Ride: 2006 550i | Silver-Grey- A08 | Premium - Sport Package | Adaptive Headlights | Logic 7 w/ CD Changer | Bluetooth | Park Distance Control | Xenon Headlights | Comfort Access [s]Sprint Booster V1[/s] | K&N filter - Stock Box w/ Charcoal Filter Removed | Clear Side LED Markers | Matte Black Grilles | RPI Air Scoop | RPI 550i GT Exhaust | 12" Kicker w/ AMP | Headlight Euro Overlays | ACS Rep Roof\Trunk Spoilers |MTEC V2 Angel Eyes | 6000k HID Fog Lights | 19" VMR v710 Stag Wheels | Hankook Ventus V12 Evo K110 Tires | Debadged | LED Courtesy Door Lamps | Sprint Booster V2 | Painted Calipers | M pedals\shift knob | HID License Plate Bulbs | R1 Drilled\Slotted Rotors | Hawk HPS Brakes| ACS replica front lip |
When I went to the dealership i had a list of things for them to check based on what i've read on the forum. My problem was the Comfort Access door handles.
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