Due to the influence of solar UV rays, most plastic parts on the car are relatively quickly crippled. With Saab cars, this usually happens with a roof antenna.
The base of the antenna is metal, but the upper part is made of plastic-rubber and This part is usually, after about ten years, almost destroyed.
You have two options (for Saab 9-3 & Saab 9-5) available: genuine replacement Saab nav fin is nearly £185, or you can still get one much cheaper – Saab Shark Fin Dummy repair fix cover – Under $5! You have another version of this Antenna Cover – It’s a little more expensive – Pilot Automotive Shark Fin Antenna for $10.
Briefly, Just remove the stick pad from the bottom and glue over the top after you’ve removed the old flaking rubber coat. Detailed instructions can be found in the video below: