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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 10-07-2012, 08:10 PM
jimvideopro jimvideopro is offline
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Location: Louisville, KY
 
Join Date: Feb 2009
Posts: 185
Mein Auto: 2006 330CiC
Losing some coolant

Cranked up the car today ('06 330Cic) and the coolant light came on. Expansion tank was empty. Topped it off with a 50/50 mix of BMW coolant, a total of 28 oz. No light when I put it in the garage the night before, and no leakage on the floor. I assume it finally just got down to the point where it triggered the light.

Any suggestions? It's not the transmission thermostat O-ring; I replaced that about 8 months ago and no signs of leakage there.

I'm off to the dealer later this week for the last visit prior to the CPO warranty running out. What should I tell them to look for? Car has just under 70K on the clock. I assume if it was the expansion tank it would be a catastrophic leak... Any suggestions/assistance are appreciated.
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