My horn sounded OK at times, but sounded sick at times. I pulled the front bumper yesterday and found the problem. I thought it was the low tone horn, however after unplugging one and then the other I found it to be the high tone horn that was bad. I ordered a new horn from the Parts Container (Partscontainer) store on Ebay. The horn is the FER oem horn made in Germany. $24 with free shipping through the post office. Should be in my hands tomorrow. I might add each horn is marked with the letter H or L.
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Artic Silver Boxster S - Black Leather - Black Top - Convience Plus Package