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#1
05-04-2009, 07:14 PM
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Water Pump Failure after 10K miles
On our 2002 4.4i, I replaced a broken water pump in Jan. 2008 when the car had 79,800 miles on it. Now car has 89,xxx miles and the water pump failed. Has anyone run across or heard of a possible bad batch of oem water pumps that might be failing prematurely. I understand these things aren't meant to last forever, but a failure after 10k miles/15 months driving just doesn't seem right. Plus, BMW parts are only warrantied for twelve months, so I'm screwed...this according to my mechanic, even though he is doing the job for 1/2 price. Any other possible causes
 . Thanks.
__________________
"The only think I like driving as much as my BMW is my Titleist" 
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#2
05-04-2009, 09:08 PM
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BMW water pumps were/are weak (plastic impeller which breaks) but I thought they changed the design.
No way a water pump should only last 10k miles. Try bavarian autohaus in NH and call them for a better water pump (like 200USD)
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#4
05-04-2009, 11:53 PM
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I have heard of impeller failures, but that is too early.
Was it a bearing problem, or a leaking seal (which is often a result of a bearing failure)? If so, I would wonder about belt tension, a frequent cause of water pump failures on other models. There is a tensioner on your belt, but conceivably there could be a problem. Just guessing.
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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#5
05-05-2009, 10:23 AM
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Quote:
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#6
05-05-2009, 01:17 PM
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Guys...can you all clarify two issues?
1) Confirm whether or not the 2 year parts warranty is correct. If so, then my indie mechanic who purchased the failed water pump should be able to get it replaced at no cost assuming he bought it from a BMW dealer parts department .2) What are the specs for the belt tensioner on the water pump? Would too loose or too tight cause premature failure? BTW...looks as though the problem was a bearing failure in the pump. Thanks for all the input!
__________________
"The only think I like driving as much as my BMW is my Titleist"
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#7
11-01-2011, 05:54 PM
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Quote:
I just paid the dealer $1500 to replace the alternator, and within 2 days of having the car back, I find out my water pump main bearing has failed!! Dealer says this is unrelated and wants $1370 to replace!!! What are the odds??? Could they have tightened the belts too much causing this failure? Car is a 2004 with 110,000 miles Any thoughts???? Please help guys - thank you
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2004 BMW X5 4.4i Sport 2004 BMW 545i 6-Spd
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#9
05-05-2009, 03:35 PM
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Quote:
Original BMW Parts : Remanufactured Parts Savage BMW splash_01
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#10
05-05-2009, 04:17 PM
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The dealer specific question is a good one.
BMW Parts Department | BMW Parts | BMW Accessories | BMW Parts Store | BMW Dealer Parts Quote:
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"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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