I've never had to replace one of these, so I'm not sure on the DIY.

I've replaced them on other cars, just never a bimmer.

I'm sure it's a pretty straight forward job if you can locate the part.

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Current Bimmer
2004 X5 4.4i Sterling Grey Sport/Premium

Past Bimmers
1991 318I Alpine White
1995 740I Alpine White
1991 525I Schwartz
1998 323IS Scwartz
2004 330CI Cabrio Titanium Silver Metallic
1995 540I Schwartz
2000 Z4 3.0 Titanium Silver
2000 330ci Coupe Titanium Silver