- 1). Flip open the flaps on the left and right on the face of the radio to expose two screws.
- 2). Loosen the screws using the special radio removal tool and pull the radio from the dash. Disconnect the harness and antenna from the radio and set aside.
- 3). Plug the adapter harness into the stock radio harness. Plug the new radio into the other end of the adapter harness. Connect the antenna.
- 4). Slide the new radio into the holder and secure per the radio manufacturer's instructions. You have now installed an upgraded BMW radio to your 1989 BMW 325i.
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