We have a pick-n-pull but for BMW's it's really only useful for the e36,e38, or e39 chassis. Very rarely do I see an e46 and e30's are pretty rare now too. Never seen an e53 there. Never.

For little things like the cupholders, steering wheel trim, etc. I use CL and look for partouts or really cheap donor cars that blew an engine or the like.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)