BMW 135i & 335i - Serpentine Belt Issues with Fix! (N54)
Having problems with your serpentine belt on your N54? I was too, until I finally figured out the cause. Check out a few of the most common culprits.
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BMW 135i & 335i - Serpentine Belt Issues with Fix! (N54)
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Interested in buying a 135i but concerned about maintenance costs (info in the comments) : r/BMW
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