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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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Old 02-06-2014, 09:00 PM
yyj3869 yyj3869 is offline
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Location: Southern California
 
Join Date: Jan 2014
Posts: 5
Mein Auto: 2011 e92 328i coupe
rear view mirror change

my car really doesn't have any special options.. i'd like to have homelink rear view mirror comes with autodim and compass. i found some used from ebay but i wonder if i purchase and install it, it will work? i mean is there any more to do for autodim and homelink and compass?
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Old 02-06-2014, 09:49 PM
Augster Augster is offline
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Location: Sandy Eggo
 
Join Date: May 2013
Posts: 285
Mein Auto: M1A1 Abrams
If your car only has a plain, manual rear view mirror (i.e. No auto-dimming at night) then yes, you will need to modify the wiring going to the mirror. BMW offers a retrofit wiring kit, PN 61120434330, approximately $30 from e-tailers, that basically runs power wires from a source in your overhead control panel. Getting the retrofit wires through the existing rubber grommet is tricky and I used a soda straw to accomplish that.

BMW's installation instructions mention that you have to code your car afterwards (e.g. INPA) but I don't think I needed to for auto-dimming/HomeLink with no compass.
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