most likely a worn mirror motor but for it happen on both might be worth replacing the relay or joystick first
part number is 24432680 for relay
part number is 24443880 for joystick

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4 10484518 12 03 254 -HOUSING, WITH BEARING, FRONT END 1
5 1114593 12 01 821 -SWITCH, STARTER 1
1 12575626 62 02 037 STARTER, ASSY. (EXCEPT RAYONG) HATCH, SALOON, ESTATE, MONOCAB F08, F35, F48, F69, F75 C 22012029-