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Discussion Starter #1
Are new Drain plugs required when changing oil in differentials and smg?

Seems everyone mentions part numbers for new ones in DIY posts so i was just wondering if entirely new ones are actually needed or do they just need a new rubber gasket
 

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The new plugs are “required” since BMW doesn’t sell the effing gaskets separately and they don’t reseal well, which causes the patented BMW oil leak. They aren’t standard orings, but the plugs are cheap enough so just buy a new set of plugs.
 

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By SMG if you mean the transmission drain than those you do need to replace the seals. They are crushed one time use. But super cheap and you need three 1 for drain, fill, & cooler filter.


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