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#1
09-26-2011, 06:26 PM
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Coolant Recovery Tank Trouble
I have a 2003 x5 3.0i and my Coolant Recovery Tank cracked. It looks like someone took a can opener and split it open all the way down the side. What would make so much pressure build up to make this happen. Oh yeah i just changed this 6 months ago. If you need anymore info let me know. Thanks, Lion Jr 
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#2
09-26-2011, 07:39 PM
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Frisco Cali.....
__________________
"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.” Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance……. 
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#3
09-26-2011, 11:51 PM
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my did that too last weekend i don't know why yours cracked i have 100,000 miles on it... i was smashing on freeway like always do and then i got a check coolant level signal came on. I ordered new one on eBay from for $35. Maybe yours was cheap like mine made in china.
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#4
09-27-2011, 11:47 AM
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Common failure point (among others). For a comprehensive review of M54 engine coolant system maintenance issues see:
Part 1 BMW Cooling System Overview with Common Failures for e36, e46, e34, e39 - YouTube Part 2 BMW Cooling System Overview with Common Failures for e36, e46, e34, e39 - YouTube
__________________
2021 X3 M40i Glacier Silver 2016 X5 xDrive 35i Mineral Silver Gone but not forgotten 2017 X4 M40i Black Metallic 1985 325e Cosmos Blue 2006 330i Monaco Blue 2006 X5 Ti Ag 2000 528i Ti Ag 1986 535is Black (great ride) 1985 528e Polaris Silver (GTA in NYC)
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#5
09-27-2011, 12:10 PM
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It's a common issue, like streetjunkie noted.
I just had mine changed at 78k mi as a preventative maintenance. Having my Cayenne Turbo's tank changed also as preventative maintenance.
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-- 08 Cayenne GTS 05 Cayenne Turbo --
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#6
09-27-2011, 12:32 PM
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In rereading the OP, I understand his issue is premature failure of the expansion tank that was replaced only months ago. Older tanks fail along plastic weld seams due to repeated heating/cooling of the plastic material over long term vehicle operation. Could be quality issue with the new tank itself (OEM vs aftermarket), or some other failure point in the coolant system.
__________________
2021 X3 M40i Glacier Silver 2016 X5 xDrive 35i Mineral Silver Gone but not forgotten 2017 X4 M40i Black Metallic 1985 325e Cosmos Blue 2006 330i Monaco Blue 2006 X5 Ti Ag 2000 528i Ti Ag 1986 535is Black (great ride) 1985 528e Polaris Silver (GTA in NYC)
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