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E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

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  #1  
Old 09-28-2012, 01:39 PM
humidorbanker humidorbanker is offline
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Location: South Carolina
 
Join Date: Feb 2010
Posts: 1
Mein Auto: BMW Z4
2007 Battery question

Today I was detailing my z4 and the battery is now dead because I had the radio on too long. Does anyone know how to charge the battery! I looked in the manual and under the hood is small compartment with a plus sign and underneath cover is a nut. Want to make sure I do it properly.
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  #2  
Old 09-28-2012, 04:19 PM
SD Z4MR's Avatar
SD Z4MR SD Z4MR is offline
(formerly SD 335is)
Location: San Diego, CA
 
Join Date: Jan 2011
Posts: 4,278
Mein Auto: '06 Z4 MR | '11 335is E92
You've found the battery positive charge point. The negative charge point is not covered and is found along the edge of the engine compartment on the driver's side just aft of the strut tower. It's a large silver nut just like the one under the + cover. It's pretty obvious because there isn't a matching nut on the passenger side.

Make sure that the car you're using to jump your Z4 is connected properly (red on positive and white or black on negative). Then connect the other red jumper cable to the positive charge point on your Z4 and the black or white cable to the negative charge point. If there are any sparks, disconnect immediately!

Have someone start the other car and keeps the revs to about 2000 RPM. Now try starting your car. It should start right up. Keep the revs up on your car for a few minutes then go for a drive (don't stall it!). It should be good to go.

P.S. Get a boom box for your garage!

P.P. S. Welcome to Bimmerfest!
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Last edited by SD Z4MR; 09-28-2012 at 04:20 PM.
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  #3  
Old 09-28-2012, 09:51 PM
rsutoratosu rsutoratosu is offline
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Location: Nassau
 
Join Date: May 2011
Posts: 94
Mein Auto: Z4
check your ac system, if its not blowing at high speed, you are in transport mode, dealer will need to reset that
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