yup westfalia. i believe they made oem parts for vw as well. no idea why they've stopped making the hitches for bmw unless it had something to do with their acquisition by daimler.

http://www.westfalia-van.de/

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'90 E30 M3
'05 X5/3.0 Sport (E53)
'03 540i/6 M-Sport (E39)
'91 325i/5 Sport Package (E30)
BMWCCA #360858 SCCA# 374179