Use a suitable drill to drill open the rivets -arrows- and take out the faulty speaker.
Note
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It is important to remove all the drillings and the remaining rivets from the door since they can otherwise lead to corrosion and result in knocking noises.
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Any damage to the paintwork which is caused by drilling out the rivets must be repaired immediately by a specialist.
Install
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Attach the new speaker with matching blind rivets.