I had the same problem and i tried many things from many website´s but no one worked for me , so i bought a new one.

The only problem with "fix it your self" method is that you MAY breaks the arrows "center" .. happened to me

But maybe the fix will work for you !

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GARAGET

Bmw X5 4.4iA 2003

4.6 Kit Front + Back
Fender Flares
Tail Lights Clear/smoke
Head Light Chrome AngelEyes
Tint 75%
Black Painted kidney grill