What is this part on Z4?

E89Tardis · 05-05-2010, 08:16 AM

I have an 09 with a fin.. I have Nav which includes HD and as I recall, includes SAT Ready (but no Sat).

I do get better stability at speeds over 1650 MPH.. Kind of like a center board in a sail boat.

Memphis1 · 05-05-2010, 09:33 AM

^^ mine works only when i'm going upside down on tunnels

teagueAMX · 05-06-2010, 07:12 PM

Men in Black - OK, press the button!

mikeinaustin · 05-07-2010, 09:41 AM

taking a look at bmwfans website, it is the satellite antenna.

gps and dab are located in the front center of the car dash, the telephone antenna is located in the lower back of the trunk/bumper, the backup phone antenna is located somewhere in the cabin (behind the back seat or perhaps between the two seats), tv/dab aerial is in the bumper.

my guess is depending on location, you may have the sat antenna pre-installed regardless of if you purchased sat rad. at the very least, the hump is there so that it could be put inside it later.

BMW665 · 03-02-2014, 12:39 AM

did this every get resolved? What is the Shark Fin for? satellite antenna is what I assume its used for

Lackey · 03-02-2014, 02:53 AM

About three years ago I downloaded a BMW Service manual "Technical Training. Product Information. E89 Complete Vehicle". It says the bump is "Satellite tuner aerial SDARS aerial (US).

ManiacGT · 03-02-2014, 06:21 AM

Another huge thread of massive conjecture and ignorant 'fact'. It does make me chuckle when people say its fact when it's just an ignorant guess lol.

The original answer to the ops post is correct. It's a US satellite radio antenna.

Kessler35is · 03-03-2014, 08:02 AM

This will put to rest what is under it, but not why some have it and others do not.

The following link shows it is where the SAT Radio Antenna is at.

http://www.realoem.com/bmw/showparts...48&hg=65&fg=30

Also, there are 2 different part numbers for that cover. I can not tell which it which by the description.

51137252844
&
51137252843

http://www.realoem.com/bmw/showparts...94&hg=41&fg=60

Oh and BTW, I do have Phone, Sat, Assist, but I do not have NAV and I do have the fin.

BMW665 · 03-03-2014, 11:42 PM

this is excellent. well done.

05-05-2010, 08:16 AM	#23
E89Tardis Private First Class 6 Rep 117 Posts Drives: 2009 Z4 35i Join Date: Sep 2009 Location: New England iTrader: (0)	I have an 09 with a fin.. I have Nav which includes HD and as I recall, includes SAT Ready (but no Sat). I do get better stability at speeds over 1650 MPH.. Kind of like a center board in a sail boat.
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05-05-2010, 09:33 AM	#24
Memphis1 Lieutenant Colonel 89 Rep 1,838 Posts Drives: Z4 SDrive 35i Join Date: Oct 2009 Location: CT iTrader: (0)	^^ mine works only when i'm going upside down on tunnels __________________
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05-06-2010, 07:12 PM	#25
teagueAMX Colonel 60 Rep 2,087 Posts Drives: Some are road worthy Join Date: Apr 2009 Location: So Cal, USA iTrader: (0)	Men in Black - OK, press the button!
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05-07-2010, 09:41 AM	#26
mikeinaustin First Lieutenant 42 Rep 362 Posts Drives: 2010 z4 3.0 crimson red Join Date: Sep 2009 Location: austin, tx iTrader: (0)	taking a look at bmwfans website, it is the satellite antenna. gps and dab are located in the front center of the car dash, the telephone antenna is located in the lower back of the trunk/bumper, the backup phone antenna is located somewhere in the cabin (behind the back seat or perhaps between the two seats), tv/dab aerial is in the bumper. my guess is depending on location, you may have the sat antenna pre-installed regardless of if you purchased sat rad. at the very least, the hump is there so that it could be put inside it later.
	Appreciate 0 Quote

03-02-2014, 12:39 AM	#27
BMW665 Private 10 Rep 86 Posts Drives: Z4 e89 Join Date: Jan 2014 Location: CA iTrader: (0)	did this every get resolved? What is the Shark Fin for? satellite antenna is what I assume its used for
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03-02-2014, 02:53 AM	#28
Lackey Major 0 Rep 78 Posts Drives: 2014 435 M Sport Vert Join Date: Sep 2010 Location: At your 6 iTrader: (0) Garage List 2011 Z4 30i [7.00]	About three years ago I downloaded a BMW Service manual "Technical Training. Product Information. E89 Complete Vehicle". It says the bump is "Satellite tuner aerial SDARS aerial (US).
	Appreciate 0 Quote

03-02-2014, 06:21 AM	#29
ManiacGT Major 85 Rep 1,448 Posts Drives: Z4 sDrive 35i Join Date: Jan 2011 Location: Manchester, UK iTrader: (0)	Another huge thread of massive conjecture and ignorant 'fact'. It does make me chuckle when people say its fact when it's just an ignorant guess lol. The original answer to the ops post is correct. It's a US satellite radio antenna.
	Appreciate 0 Quote

03-03-2014, 08:02 AM	#30
Kessler35is Second Lieutenant 48 Rep 247 Posts Drives: 2015 F15 50i, 2016 E89 35is Join Date: Jun 2013 Location: Tupelo, MS. iTrader: (0) Garage List 2016 Z4 35is [0.00] 2015 X5 50i [0.00]	This will put to rest what is under it, but not why some have it and others do not. The following link shows it is where the SAT Radio Antenna is at. http://www.realoem.com/bmw/showparts...48&hg=65&fg=30 Also, there are 2 different part numbers for that cover. I can not tell which it which by the description. 51137252844 & 51137252843 http://www.realoem.com/bmw/showparts...94&hg=41&fg=60 Oh and BTW, I do have Phone, Sat, Assist, but I do not have NAV and I do have the fin.
	Appreciate 0 Quote

03-03-2014, 11:42 PM	#31
BMW665 Private 10 Rep 86 Posts Drives: Z4 e89 Join Date: Jan 2014 Location: CA iTrader: (0)	this is excellent. well done.
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