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  #1  
Old 12-08-2010, 09:06 AM
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x5 4.4i After market Battery

Hi Guys, I recently changed out my x5 4.4i battery with an after market battery. Everything was working fine for 4 months, but now I am getting the fasten seat belt warning appearing randomly as well as the air bag light coming on randomly.
I just took the car in for service and BMW is claiming it is all related to the aftermarket battery.
In these posts I see many other folks asking the same questions, do I really need to pay over $350 USD for a battery when I can buy one down the road for $70-100 USD?
I'd like to understand what output (voltage and amperage) the battery should be providing to the car and if there is any one else who is experiencing the same issue. (Or is my dealer trying to make a few extra bucks off me???)
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Old 12-08-2010, 10:48 AM
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Quote:
Originally Posted by jvwiv View Post
Hi Guys, I recently changed out my x5 4.4i battery with an after market battery. Everything was working fine for 4 months, but now I am getting the fasten seat belt warning appearing randomly as well as the air bag light coming on randomly.
I just took the car in for service and BMW is claiming it is all related to the aftermarket battery.
In these posts I see many other folks asking the same questions, do I really need to pay over $350 USD for a battery when I can buy one down the road for $70-100 USD?
I'd like to understand what output (voltage and amperage) the battery should be providing to the car and if there is any one else who is experiencing the same issue. (Or is my dealer trying to make a few extra bucks off me???)
Bmw dont manufacturer batteries!Varta made the one I have for Bmw,so no reason why you cant get a Varta aftermarket battery!
If the battery in your car has been tested to be ok,then its something else and the dealer also wants to make a few extra bucks.
If the battery is indeed faulty,then just get a replacememt under warranty from where you got it and it wont cost you nothing!

The spec of your battery should be 90AH 720A.
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Old 12-08-2010, 11:23 AM
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Thanks for the input. I really appreciate the help.
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Old 12-08-2010, 11:35 AM
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Originally Posted by jvwiv View Post
Thanks for the input. I really appreciate the help.
You are welcomed!Good luck in sorting it out..Lets us know
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Old 12-08-2010, 11:55 AM
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I have had an interstate in mine for more than 2 years with no issue. battery is a battery, nothing magic about one with a BMW logo on it!!
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Old 12-08-2010, 12:25 PM
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Quote:
Originally Posted by jvwiv View Post
Hi Guys, I recently changed out my x5 4.4i battery with an after market battery. Everything was working fine for 4 months, but now I am getting the fasten seat belt warning appearing randomly as well as the air bag light coming on randomly.
I just took the car in for service and BMW is claiming it is all related to the aftermarket battery.
In these posts I see many other folks asking the same questions, do I really need to pay over $350 USD for a battery when I can buy one down the road for $70-100 USD?
I'd like to understand what output (voltage and amperage) the battery should be providing to the car and if there is any one else who is experiencing the same issue. (Or is my dealer trying to make a few extra bucks off me???)
As everyone stated already, I have interstate battery DL49 (it's for X53 4.4i) for 2 years now and no problem.

Are you sure your alternator is fine, sometime dead battery is the aftrmath of bigger problem not the culprit.
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Old 12-08-2010, 12:34 PM
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those symptoms seem to me completely unrelated to battery or alternator. BTW - once the car is started the battery is totally out of the equation if the alternator is working properly.
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Old 12-08-2010, 01:33 PM
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Not true!If the battery isnt holding its charge ,then its not out of the equation!
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Old 12-08-2010, 01:44 PM
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Where did u get a price of 350? I just paid under 200 for a BMW battery at the dealer.
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Old 12-08-2010, 02:07 PM
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The seat belt warning going off randomly and airbag light both point to the passengers seat mat sensor... I wonder what codes were stored for them to equate that to the battery????

Do you have a copy of the work order and/or can obtain the diagnostic paperwork?
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