In a Autoscan I get this DTC:

Address 56: Radio (J503)       Labels:. 5M0-035-1xx-56.clb
   Part No SW: 5J0 035 161 A    HW: 5J0 035 161 A
   Component: Radio         005 0013  
   Revision: R0005000    Serial number: SKZAZ4I7590781
   Shop #: WSC 13765 790 00000
   VCID: 204F83C93092AA4AF5-5140

2 Faults Found:
00870 - Bass Speaker Front Left (R21)
            011 - Open Circuit - Intermittent

 

Where is this speaker and what trims have to come off?

Left front door. Probably a broken wire in the rubber gaiter between A pillar and door or dodgy connector on A pillar. Pull the rubber back and check.

 

Edited 17 November, 20187 yr by xman