Just replaced driver's side angel eye bulb on my 2005 4.4. Installation is little bit tricky on 4.4 since you need to move away expansion tank and power steering reservoir, but not too bad. At least you don't have to disconnect any hoses. Got replacement bulb on Amazon - $9 a pair much better than over $20 for OEM. Please remember when opting for bulb only replacement - old bulb need little help to get out from it's fixture and than you will need to notch fixture reflector slightly to let new bulb in. Entire job took about 20 minutes from start to finish including fishing for access oppening cover that fell into the wheel well.
CEC Industries #64113 Halogen Bulb 13.5 V, 11 W, BA9s Base, H11W, T-2.75 shape (Pack of 2) - - Amazon.com

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2012 X5 x35i My new toy
2005 X5 4.4 Her's (Retrofitted Servotronic Steering Rack)
2003 X5 3.0 Mine (Retrofitted Servotronic Steering Rack and Heated Steering Wheel)
2001 M5 Son's car
2000 540i 6sp Sports pkg, supercharged. Son's car (Sold)
2001 530i (Sold)
1999 528i (Sold)
1975 2002 (Sold)