Hi there,
I recently fitted a OEM wind deflector to my 2008 Z4. It is not a hard job and as long as you take your time you really can’t go wrong.
There are two types of wind deflector available from BMW, the cheaper one is a kind of cloth and mesh which requires no dealer fit time and simply installs over the head rests and secures somewhere in the car. It is around £125 from the dealer, cheap but nasty looking in my opinion. Scroll down this page and its called “Wind deflector (Mesh)â€
http://www.bmw.co.uk/bmwuk/accessories/ ... uk,00.html
The second and preferred type is just above the Mesh one in the link above it is called “Wind deflector (Honeycomb)â€. I was originally quoted around £450 supplied and fitted by the dealer just on a cold call so I looked around a bit. Bear in mind that if you do not already have this installed you need to replace the roll hoop covers as they need to be removed and doing so breaks the “one time fit†clips so if you are going to the dealer to buy this kit you need to factor in the cost of these.
I then found a site called SoCal Motorsport in the US who had the complete kit including the roll hoop covers for around £170 shipped. It arrived in under a week and I had it fitted in about an hour. The worst bit is removing the old roll hoop covers as you need to snap the clips and there is just something that feels so wrong about hearing snapping noises as you remove bits from your new car.
SoCal also sell on the bay, here is the kit I bought
http://cgi.ebay.com/ebaymotors/ws/eBayI ... OTORS:1123
If you have any concerns please e-mail them, I found them very helpful. They sent me a copy of the installation PDF which I still have if you want a copy.
Some additional info and opinions on this subject on the zpost forum here
http://www.zpost.com/forums/showthread.php?p=1077973
There is a third kind I found which seems quite good, a clear one from Roadster Solutions, I can’t give you any personal opinions on this other than to say they were helpful but I preferred the OEM one so went with that in the end.
http://64.225.94.154/ShopSite/page52.html
I hope this has helped, as plowy says above do not pay the dealer for this, If I did not feel I had the time or confidence I would pay a good indy first but honestly this is an easy job.
If you have any questions or want a copy of the installation PDF let me know.