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Old 07-04-2016, 07:55 PM   #1
e46TO
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Join Date: Jul 2016
Location: Brampton
Posts: 1
My Ride: 1999 323i e46
What's this hose called? (help...)

Hey all,

New to the forum here. I recently took ownership of my brother's hand-me-down, a 1999 BMW 323i (E46). While I was changing out the expansion tank, I noticed a pretty significant hole in a hose which is adjacent to the belt running between the alternator and power steering pump. The hose sits beneath the alternator and the lower hose running from the expansion tank. It was disconnected from whatever it connects to at the bottom, and was hanging and rubbing against the belt; thus the hole.

I reconnected the hose to its intended spot just in front of the front left wheel, started the car up after changing out the tank and filling the cooling system, and the car began choking and stalling as if it wasn't getting air. Not to mention, the following codes it threw out at me: 0300, 0301, 0302, 0303, 0300P, 1189, and 0170. I checked all 3 spark plugs, boots, and connectors and they were fine. Not to mention, just having changed out all the plugs and boots a little over a month ago.

Anyone know what belt this is (part #/name), and how easy it is to change out?
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Old 07-04-2016, 07:59 PM   #2
allikanbe
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Join Date: Jul 2014
Location: VA
Posts: 135
My Ride: 2006 330Ci Convertib
It looks like your power steering is leaking on the hoses below it. Check this site www.realoem.com and enter your year and model of car. you will see the exploded view of all the parts.
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Old 07-05-2016, 07:32 AM   #3
markusmarkus
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Location: USA
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My Ride: 2001 330Ci
That hose routes cool air to the alternator. It's been damaged because the engine mounts are worn, allowing the engine to move. I recommend you change the engine mounts and replace the cooling duct.
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air, alternator, expansion tank, hose, lower

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