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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 08-16-2012, 01:46 PM
ABQZ3 ABQZ3 is offline
Location: Albuquerque, NM
Join Date: Mar 2010
Posts: 25
Mein Auto: 2001 Z3 3.0i
Can anyone who is familiar with e46 diesels identify this part?

Hello all,

Long time! Forgive me if this is covered somewhere on the boards... I don't actually own this car or have access to it.

My old man just took a govt job in Germany and is looking at buying a Euro-spec 2002 330d wagon (touring). He noticed a certain part under the engine is rusty. The part is what is circled in this picture. It's located right next to the driver-side strut tower.

From Misc

Can anyone here tell me what the heck this thing is? Looks like some kind of pump or regulator or solenoid... I'm out of my league here.

Any help would be appreciated. Thanks!
I like pizza
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Old 08-16-2012, 02:19 PM
LtFutt LtFutt is offline
Registered User
Location: Norway
Join Date: Aug 2012
Posts: 2
Mein Auto: 330
I think this is the valve for cockpit warm water.
It is a temp sensor that keeps the valve open or shut in ordrer til heat up the water to the interior as quick as possible.
Or so I think
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Old 08-16-2012, 03:22 PM
floydarogers's Avatar
floydarogers floydarogers is offline
Pedant and Curmudgeon
Location: Renton, WA
Join Date: Oct 2010
Posts: 3,831
Mein Auto: 335d, 328d, Toyota T100
Might be the heater valve and water circulation pump for Rest Heat function.

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