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04 325XIT 05 325IT
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529 Posts
Good thing you changed it, if one looks like that , probably any rubber OF that age should be changed now too, same with the plastics...
 

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582 Posts
I encourage you to replace the old hose with one made out of Silicone, it will last much, much longer.
 

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9 Posts
Mine was throwing a check engine code recently. Scan tool said both upstream O2 sensors. My friend, a BMW master tech, said replace the cracked intake boot (lower). I hadn't spotted it. Sure enough, no more CEL.
 
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