- Belsee 6 M Length Extension 17 Pin+40 Pin Installation Wiring Harness Cable Plug Kit Fit BMW DSP E39 E46 E53 E38 Radio Navigation$79.99Belsee 6 M Length Extension 17 Pin+40 Pin Installation Wiring Harness Cable Plug Kit Fit BMW DSP E39 E46 E53 E38 Radio Navigation Learn More