My E53 was already configured with a heated steering wheel. However, I fitted my E46 with one using an E53 heated steering wheel using this guidance

Pictorial DIY: BMW Heated Steering Wheel Retrofitted onto an E46

And one in my E90 using this guide:

http://www.xoutpost.com/bmw-sav-foru...ml#post1020960

The hardest part was finding a donor wheel that met my cosmetic standards.

Mike

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Mike
Dallas, TX & Appleton, WI
2003 E53 4.4i Pearl Beige
2003 E46 330Xi Monaco Blue
2007 E90 335Xi Black Sapphire Metallic
2011 F25 X3 28i Black Sapphire Metallic