Putting a sat nav even from a R53 that doesnt already have it in is not just about fitting the display part, theres all the drive system etc to go with it, you'll be better off with a separate tom tom and mount that instead.
The BMW mechanics told me theres almost virtually nothing that fits from a Gen 1 to a Gen 2, of course if youre a real clever dick and got loads of time and money and the skills you can do just about anything, there will always be someone that will say they have done it somewhere, like the guy whos put a helicopter engine in his MINI some would say thats impossible.
Its not as simple as swopping one from the other and plugging it in.
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