Front left mid-range speaker "R101" / front right mid-range speaker "P102" / front left low-frequency speaker "R21" / front right low-frequency speaker "R23". The removal and installation procedure is identical. Switch off all electrical consumers. Switch off the ignition. Remove the front door trim. Disconnect connector "3" of the front left low-frequency speaker "P21--1". On the front left low-frequency speaker "P21" "1", unscrew screws "2". Remove the front left low-frequency speaker "P21--1".
Installation in reverse order.
[Information obtained from this resource: Audimanual.ru]