the bmw didn't offered factory
but one company in germany did
https://www.rameder.de/bosstow-anhae...5-05086-1.html
this is version for coupe , with big discount
the cabrio version may differ if rear bumper reinforcement is different from coupe
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E81 2007 130i 6cylinder Montego blue
Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.