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      12-04-2012, 03:54 PM   #10
1speedbike
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Drives: 2008 BMW 135i
Join Date: Jun 2008
Location: NJ, NYC, Baltimore

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How long are you planning on keeping the car?

I thought BMW gave us a 12 year / unlimited mile rust and corrosion warranty. If you keep the car 12 years, it's gonna need a lot more than a de-rusting.

Also, some of the rust-proofing crap they spray under there tends to degrade rubber.. so if they spray your bushings a bit too much... eh. I'm not worried about rust. I live in NJ, and just give the car a semi regular bath in the winter. My coilovers aren't rust proof (and neither are most springs and shocks) and they are very exposed, so I would just check on those every once in a while to see if there's any surface rust.
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