Symptoms start when you notice "sluggish starting". Like it started ok but it seems to take 1 or 2 seconds more than it used to. Not all the time but enough you notice. That will progress to intermittent starting. Like it cranks n dies but will turn over and stay running on the second try. That will then turn into crank no start. (Will crank & crank may start but quickly dies followed by constant crank but no start) Jumping the car will get you going. Next parasitic drain. (Drive around sll day with no issue. Next morning the battery is dead.

NEVER NEVER SAY YOU'RE dumb or stupid, matter of fact you're quite intelligent to figure it out and matter of factly BMW is quite the morons for putting such BS in a car for getting groceries and picking up kids etc. .... it's not a rocket to go to the moon ! Thanks too much for your efforts in figuring such a mess and what caused it in the first place, then sharing your findings with us.... much appreciated, God bless you I have 105,000 miles on my 2008 535... l was only able to drive the car 3 months after buying it 15oct2020, it sat at my job for several months before towing it to the BMW dealer "for nothing" The warranty or time for recall on the hpfp had already expired. Now it sits at the shop and the mechanic can't even figure out the problem or at least that's what he tells me anyway. The mechanic tells me there's a chip on a circuit board contained within the fuse box behind the front glove box that's blown so replace the whole front fuse box !.!.! Sound like a load a bullshit to you ? Yah, me too... So far by not knowing the problem I've replaced the hpfp and all 6 injectors.... injectors were the last codes it threw... and there was a recall in the hpfp.... oh n l should add the BMW dealership here in Dallas advised on the service record that it needs a new control module ecu ! and a new battery.... When l'd do 75 on the freeway an engine damage warning would tell me to slow down... I'd back off to 60 and things would go ok then. When I see your video and hear you beat yourself up please don't feel bad, feel proud, you're very smart to figure it out and I feel pretty good that I'll NEVER buy another BMW. Compare: you invested hours, I've invested 16 months and it still does not run ! at this point should I replace the ibs and new battery to see if it starts ? your advice is very helpful indeed, thanks dellthecomputer.9may2022

I’ve had 2 bmws so far that killed the battery one after a day and one after 15 mins turns out it was the Ibs sensor for both, what I found out was that jumping the car directly from the battery over amps the Ibs sensor and fries it so, replaced Ibs sensors on both vehicles and so far no comebacks on discharged batteries.

I have bmw 525i 2004 getting no power on the dash no crank no start only my head light work and power in the park light near the lever stick. Any help

Very good video. I succeeded in getting a friend's e60 started by disconnecting the Ibs. I initially thought it was an engine ground issue as the battery measured 11.9 volts but the measurement on the positive terminal on the engine and frame was only 5 volts. Would the Ibs cause this voltage imbalance?

Thanks for the video. Anyway i quess that BMW does not asemble that sensor for nothing. Does it harm car when you switch that off?

You have an e60 54”. Never had any issue before with the battery until about a month ago. After not using the car and heavy rain, the car wouldn’t start. Also water has seeped through the back driver passenger side( quite a lot of water). I’ve sorted the window seal out and no more water came. However, I’ve suspected the car not starting to be a battery issue but it’s not. I had 3 new batteries in, which will charge when driving but after 1 day alarm will go off and battery has died. Car will also go sleep after 15 mins. We’ve checked the car for paralistic draw but none detected. After researching I’ve came across the IBS which could have been damaged as initially there was a tiny bit of water in the trunk next to the battery. Before I change the IBS could someone advise please. Thank you

Did you find any fault codes on INPA/ISTA leading to the IBS?

My 2005 545i e60 wouldent start and i bought a thinkdiag tool off ebay and reset key number one then it started but it said keys were ok yet i still reset it then it started

On my father E60 first was batery drain, so he bought new battery. After that same drain happend so he took to mechanic who replace alternator. Afther that two days and again same drain of battery. What we find out that idle buzzing sound from motor is not stoping and that is what drain battery. After i disconnect IBS that buzzing still not stoping. On some forum says that IBS control that idle time... i dont know how to check if IBS is not working. And that is what drain battery.

Can you explain a little bit about the resistance value? You are measuring to ground and the resistance is 400 Ohms and you say that that is enough to meet spec (19 Ohms) but after you fix the problem the resistance goes to 1.7K Ohms which fixes your problem (disconnected is 200K Ohms). Did you mean to say that 400 Ohms doesn't meet spec (not enough to stop the wake up from going to ground) and maybe you meant to say that spec is 19K Ohms?

I have one question ignition is turn on if ibs dont work? In you problem before to find that ibs you have ignition?

Dud the car crank? Before removing connector. Swing but no start?

Kiitti neuvosta, mulla neljä vuotta seiso pihalla tommonen ja pari päivää pähkäillyt et miks ei inahakkaan ja tällä tuli kuntoon!

Can you measure the resistance of the ibs can bus line ?? I want to check mine because i have some problem with alternator or obs sensor because sometimes it shows me in dashboard low battery charging and car is stopping,ans sometimes i have “high battery discharging “ i don’t know what to do ….

لدي مشكلة تفريغ البطارية هل تصلح هذه الطريقة

Tämä oli hyvä ja toimava keino, harmi kun en aiemmin löytänyt videotasi.

You can code it out.

mul on tuo intelligent battery sensor fault ja sit sytty airbag valo ja en voi nyt nollata

1 fuc**** wire ... Headahce the whole day bro

Did it start when disconected?

2c9e dme