The tuner module is under the boot floor next to the battery, the navigation module and cd changer is in the rear left quarter panel, often there is also an audio amplifier in the rear left quarter panel too. Installations on these cars are straight forward, using adapters at the back of the radio to fit either a new stereo or a handsfree kit.Ĭars with the navigation radios have just a screen in the dashboard, other components of the audio system are located elsewhere in the car. There is a quadlock connector at the back of the radio in the dashboard (some very early models have a round pin BMW connector, these models are rare) and the radio supplies audio directly to the speakers. The audio system in the car is wired differently depending on which type of radio is originally fitted.Ĭars with a standard basic radio have a more traditional setup. There are two types of radios originally fitted to the BMW X5 E53, standard and navigation.

The E53 is the first generation of the X5 model line.

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