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BMWs throw back to the iconic 2002, with a renewed form and function. The smallest car in BMW's line up but still packs a punch. Available in coupe or convertible, powered by a naturaly aspirated inline 6 in the 128 or the turbo twin power inline 6 rocket sled 135.

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  #1  
Old 11-18-2017, 07:27 AM
Carmannn Carmannn is offline
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Location: Flower Mound
 
Join Date: Nov 2017
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Mein Auto: Bmw 128
Srs light/ seat belt light

2008 128 convertible had the battery checked out at autozone.com and said it was bad. They had to jump it from the trunks battery and when my wife drove away she noticed the airbag/ seat belt light was on. She drove over to Walmart and had a new battery installed. The battery definitely fixed the starting issue however the airbag and seat belt light is still on. Could the low voltage on the old battery caused this to occur? How about the Pyro something or other on the wire to the battery? Do I just need to get a reset tool? Thanks in advance.
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  #2  
Old 11-19-2017, 10:35 AM
Cancar123 Cancar123 is offline
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Location: Maryland
 
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Mein Auto: Bmw f30
Bmw batteries need to be registered every battery exchange. Through bmw Ista computers
It could confuse the srs system still thinking you have that old faulty battery in the car therefore putting out undervoltage
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Old 11-28-2017, 11:31 AM
Dave1977 Dave1977 is offline
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Location: Usa
 
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Mein Auto: 2008i 128i
In the + battery connector panel there is a connector to the airbag sensor. Is small and black. Is very easy to damage if not careful when changing the battery. If they are unable to clear the code when the battery gets registered, then the connector could have been damaged during installation. Sometimes mechanics take it off to ease the process, but it can not be pulled straight out. A screw driver needs to be used on the top lip of the connector, gently pulled up to free and gently pull the connector out. Is very frail. Also make sure that the vent was connected. If not the battery will be venting to the trunk and you do not want that. Unfortunately BMW batteries are not like any other battery. If you don't register and reset the charging cycle system, the computer will keep the charging the "old" battery needs and your new battery life will not last.
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