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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 10-08-2013, 08:15 PM
Rosie06330i Rosie06330i is offline
Billy Rose III
Location: Honolulu
 
Join Date: Mar 2013
Posts: 22
Mein Auto: 2006 BMW 330i
MAX A/C turned itself off

2006 330i. Started my car, I live in Hawaii so I always press the MAX A/C button as soon as I get in the car. This time it randomly went from max to auto. Pressed it a few times, lasted for a few seconds then went back to auto. Waited a minute, then pressed it again and is now running fine. Is this an issue I should address urgently or should I sweep it under the rug? Thanks for the advice.

Billy


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  #2  
Old 10-09-2013, 12:00 AM
gcreese gcreese is offline
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Given that it happened right at the beginning, it may be a sign that your battery is starting to go. BMW has some algorithms that decrease battery drain if the car feels the battery is being overtaxed. If I remember correctly, MAX turns the fan on to full blast, and maybe that was too much at the beginning of the start sequence. See if it happens again if you wait a minute before hitting the MAX button.
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  #3  
Old 10-09-2013, 01:00 AM
Rosie06330i Rosie06330i is offline
Billy Rose III
Location: Honolulu
 
Join Date: Mar 2013
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Mein Auto: 2006 BMW 330i
MAX A/C turned itself off

Thank you


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  #4  
Old 10-09-2013, 07:12 AM
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bmwrocks bmwrocks is offline
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Location: Winter Park, FL
 
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Mein Auto: 2011 328i Convertible
I can tell you that my battery was dysfunctional about a month ago, and even though it would start the car, I was seeing some power conservation symptoms. The blower fan would not blow full speed even on highest manual setting. The welcome lights no longer worked. Dealer diagnosed it as bad battery and replaced it. All is good now.
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  #5  
Old 10-09-2013, 08:48 AM
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thekurgan thekurgan is offline
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Mein Auto: S65B40 Powered
This can also happen due to a malfunctioning outside air temp sensor, usually located in the lower front bumper section. These do not always throw codes.
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  #6  
Old 10-09-2013, 12:57 PM
Rosie06330i Rosie06330i is offline
Billy Rose III
Location: Honolulu
 
Join Date: Mar 2013
Posts: 22
Mein Auto: 2006 BMW 330i
MAX A/C turned itself off

How much would a new battery be?


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  #7  
Old 10-09-2013, 01:19 PM
Tom K. Tom K. is offline
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Quote:
Originally Posted by thekurgan View Post
This can also happen due to a malfunctioning outside air temp sensor, usually located in the lower front bumper section. These do not always throw codes.
When the wiring to my E46's sensor was destroyed by chipmunks, the CC system functioned normally; except that the compressor would not come on as the car thought the temp was -40o F.

Tom
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  #8  
Old 10-09-2013, 01:21 PM
Tom K. Tom K. is offline
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Originally Posted by Rosie06330i View Post
How much would a new battery be?


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About $300 to $400 from a dealer - including registration. If your '06 has the original battery, it's probably past due for replacement.

Tom
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  #9  
Old 10-09-2013, 02:16 PM
gcreese gcreese is offline
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Registration is when the dealer tells the system via coding that a new battery is installed. According to BMW, the car charges an old battery differently than a new battery, so it needs to know when a new one goes in. Otherwise, the car will overcharge the battery, eventually leading to shorter battery life. There's a running debate on this forum whether registration is really necessary. Some say it is, some say it isn't. However, the separate registration process is why the fee is so high. One option is to have a third party install a new, appropriate battery, and then have the BMW dealer do the registration. The total price may be cheaper than having BMW do both parts of the process.
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  #10  
Old 10-09-2013, 02:19 PM
surfcity335i surfcity335i is offline
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Location: Huntington Beach
 
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Mein Auto: 2012 335i M-Sport
Quote:
Originally Posted by gcreese View Post
Registration is when the dealer tells the system via coding that a new battery is installed. According to BMW, the car charges an old battery differently than a new battery, so it needs to know when a new one goes in. Otherwise, the car will overcharge the battery, eventually leading to shorter battery life. There's a running debate on this forum whether registration is really necessary. Some say it is, some say it isn't. However, the separate registration process is why the fee is so high. One option is to have a third party install a new, appropriate battery, and then have the BMW dealer do the registration. The total price may be cheaper than having BMW do both parts of the process.
What a scam. Just another way to part us from our money. Next we're gonna have to code the new air in the tires at 1hr labor so the car knows the old air is gone.
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  #11  
Old 10-09-2013, 03:19 PM
Ilovemycar Ilovemycar is offline
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Location: CA
 
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Mein Auto: '08 335i coupe 6MT sport
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Originally Posted by surfcity335i View Post
What a scam. Just another way to part us from our money. Next we're gonna have to code the new air in the tires at 1hr labor so the car knows the old air is gone.
I'm hoping to learn how to DIY register it when the time comes. I've heard that some indys charge much less, I think people may have mentioned on the order of $50 or so. Of course, it sounds like you think it's BS and I can respect that opinion, but myself I'm going to register...
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  #12  
Old 10-09-2013, 03:28 PM
surfcity335i surfcity335i is offline
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Originally Posted by Ilovemycar View Post
I'm hoping to learn how to DIY register it when the time comes. I've heard that some indys charge much less, I think people may have mentioned on the order of $50 or so. Of course, it sounds like you think it's BS and I can respect that opinion, but myself I'm going to register...
Oh, I think I'd register, too. The BS refers to the designed-in need to do it.
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