Better translation from BMW Korea's official letter from OP's post; (refer to attached image)
- Seat frame is made of steel (Fe), and in general it has to be under rust preventative process, but in this case, we confirmed that the seat supporting part in red circle did not have rust preventative process and was assembled with seat cushion, then rust has developed as time goes by, so we fixed this issue since Nov. 2012 productions.
- This rust issue is not affecting the car's normal operation, but we will provide rust prevention service to all new 1, 3 series which released before Nov 2012, for quality improvement and customer satisfaction purpose.
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