BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > F21 4x4
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      11-08-2018, 03:14 AM   #1
Jufor
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F21 4x4

Can anybody advise me wether it is possible to add a 4x4 system from an Xdrive
onto an F21 2012 pre facelift and keep auto gearbox?
Is it just a question of finding a donor car and swapping?
Mine is a diesel 125d MSport 3 dr with 282bhp and would like more traction.

Could anyone knowledgeable advise me.

Thanks👍
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      11-08-2018, 04:15 AM   #2
ovekvam
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The F20/F21 was delivered with X-drive and auto gearbox, at least with the six cylinder engine. So maybe if the donor car is an M135i, and the gearbox fits the four cylinder engine, it could work?
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      11-08-2018, 04:56 AM   #3
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I have a F21 120D Xdrive. So if you take the gearbox and transfer box it might be possible.
You also might need to use or a different ECU or someone who can do that retrofit
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      11-08-2018, 12:24 PM   #4
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It should be a question of how crazy you are. I would strongly suggest the amount/cost of work should be pointless even if you get the parts for free (will you? ). And complexity (you don't have a working solution to just apply) is there too.

Consider swapping the car. Or just better tires.
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