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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 10-16-2013, 07:24 AM
blackjuju2 blackjuju2 is offline
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Location: Gahanna, Ohio
 
Join Date: Oct 2013
Posts: 5
Mein Auto: 2008 335i
e90 ibs

my dealer is telling me i need am intelligent battery sensor replaced at the cost of $425.00, i have seen them on e-bay for $215.00 and they look pretty simple. i am sure the part must be coded to the car. i am getting a bit perturbed with the idea of not being able to do routine maintenance such as changing out a battery on my car. i love driving this car.
how can i get around some of this.
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  #2  
Old 10-16-2013, 07:48 AM
CALWATERBOY's Avatar
CALWATERBOY CALWATERBOY is offline
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Location: San Francisco
 
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Posts: 10,058
Mein Auto: 2009 E93 N54
Quote:
Originally Posted by blackjuju2 View Post
my dealer is telling me i need am intelligent battery sensor replaced at the cost of $425.00, i have seen them on e-bay for $215.00 and they look pretty simple. i am sure the part must be coded to the car. i am getting a bit perturbed with the idea of not being able to do routine maintenance such as changing out a battery on my car. i love driving this car.
how can i get around some of this.

Exactly why does it need replacement - detail please?
How did they troubleshoot it - detail again?

This looks like a simple assy and may be no more than a resistor as a current sense. Wow....item #2 in this illustration.
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  #3  
Old 10-16-2013, 08:02 AM
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CALWATERBOY CALWATERBOY is offline
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Mein Auto: 2009 E93 N54
.

THIS may be useful info and a better view of what the IBS looks like. Note the blue connector - two wires just as a current sense would have.

Most annoying that nobody's torn one down - if you have a replaced IBS don't throw it out - I'll take it apart! PM for deliv addr.
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  #4  
Old 10-16-2013, 08:11 AM
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CALWATERBOY CALWATERBOY is offline
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Mein Auto: 2009 E93 N54
.

OTOH, I might find THIS! A power monitor, fairly common and very useful in predicting the future; diagnosing the state of the system. Yup, still just resistors, but includes analog to digital processing on-chip - digital output: current, voltage; temp. A number of secondary calc's derived. BMW's cost of electronics? Likely <$5

You N54/52 pilots - need your old IBS! In return, detailed photo teardown thread will be posted. PM me.

blackjuju2?

.

Last edited by CALWATERBOY; 10-16-2013 at 09:20 AM.
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  #5  
Old 10-17-2013, 11:18 AM
fdriller9 fdriller9 is online now
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Mein Auto: '06 AW 330xi
IBS monitors the battery and relays info to the DME. You would need more than a simple current sense circuit to replace it with a DIY setup.
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  #6  
Old 12-27-2014, 11:24 AM
hunnypuppy hunnypuppy is offline
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Mein Auto: 535i
IBS explanation from BMW:
http://prodcds.bmwuniversity.com/lib...Management.pdf
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  #7  
Old 12-27-2014, 01:03 PM
CALWATERBOY DUE's Avatar
CALWATERBOY DUE CALWATERBOY DUE is offline
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Mein Auto: 09 E93 335i somewhat mod
Quote:
Originally Posted by hunnypuppy View Post

IBS - your common battery charging device with data bus to DME as massaged for BMW's specifics. Most interesting is messaging to shut down loads as battery condition changes - unclear if IBS selects which to kill, or DME....?? Maybe should read again.


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  #8  
Old 12-27-2014, 01:21 PM
hunnypuppy hunnypuppy is offline
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Location: macon
 
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Mein Auto: 535i
DME, IBS only sends the raw data to the DME, DME decides Class A or Class B shutdown. (see manual)

People who disconnect IBS, still works but no real time data only static information assumed by DME
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  #9  
Old 06-21-2015, 10:19 AM
jboban jboban is offline
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Location: Serbia
 
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Mein Auto: 2006 BMW e90 320d
Cool 4A27 error, but I don't have IBS

Hi,

I have replaced voltage regulator, but now have 4A27 error:
Code:
E R R O R   M E M O R Y
---------------------------------------
Date: 19.06.2015 18:10:20
ECU: D60M47A0
JobStatus: OKAY
Variant: D60M47A0
-------------------------------------------------------------
RESULT: 1 error in error memory !
-------------------------------------------------------------
4A27 4A27 Intelligenter Batterie Sensor (Layer_DIBS1)
Error counter: 1
Logistic counter: 40
Mileage 213384 km
Motordrehzahl 992.97 1/min
Kühlmitteltemperatur 44.10 °C
Abstand zur Startfaehigkeitsgrenze -0.00 -
Einspritzmenge 11.42 mg/Hub
Batteriespannung von IBS gemessen 14.00 V
Batteriestrom von IBS gemessen -3.78 A
Batterietemperatur -0.00 °C
Batteriespannung 14500.43 mV
Fahrzeuggeschwindigkeit 0.00 km/h
Korrekturwert Abschaltung -0.00 -
keine Kommunikation ueber BSD-Schnittstelle
Testbedingungen noch nicht erfüllt
Fehler momentan vorhanden und bereits gespeichert
Fehler würde kein Aufleuchten einer Warnlampe verursachen
Fehler nicht im Shadow eingetragen
Umweltbedingungen 1. Block gültig (Fehler nur einmal aufgetreten)
Umweltbedingungen 2. Block ungültig (Fehler nur einmal aufgetreten)
Error code: 4A 27 74 02 00 00 01 28 68 31 24 5E 62 1D 7D 32
40 59 00 62
=============================================================
Voltage regulator is Valeo, the same type and number, it works fine now and the voltage is up to 14.4 V.

My problem is that I don't have IBS on negative battery lead. Why my DDE tries to communicate with IBS and has error?

How to tell them that I don't have IBS???
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