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  #1  
Old 01-02-2014, 07:20 PM
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Average life of water pumps

I just changed the electric water pump on my 335i and I bought the pump from a BMW dealership. So whats the life span I'm looking at until this pump goes out again because I'm hearing that these cars have that problem.
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Old 01-02-2014, 07:39 PM
aleks001 aleks001 is offline
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Originally Posted by Smalls1000 View Post
I just changed the electric water pump on my 335i and I bought the pump from a BMW dealership. So whats the life span I'm looking at until this pump goes out again because I'm hearing that these cars have that problem.
I don't know if you will get a real answer for this because people have gotten all kinds of miles out of them. All I know is that I will change mine every 60K.
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Old 01-02-2014, 07:57 PM
techietaichi techietaichi is offline
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Yep, there's really no definitive life span for these units. I'm not sure if I have the same type of WP as a 335 as I own a 325, but I'm almost at 100K and it's still going. One suggestion if you don't mind putting out $50-60 is having a diagnostic done to see where it's at in terms of reliability. I had mine done just recently and the SA returned with a report of good health for mine. If anything at all, it relieved my anxiety at least for the moment, but I'm still prepared to have that job done when it's time. Half the battle's being prepared for what's to come. Good luck man.
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Old 01-02-2014, 08:01 PM
aleks001 aleks001 is offline
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Having your SA tell you your waterpump is in good condition means nothing on these cars. When they fail, 90% of time it's without warning, which is why I will never wait for it to die again, I'd rather spend a couple of hundred for the piece of mind.
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Old 01-02-2014, 08:05 PM
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Is it due to not changing your coolant often enough on these pumps (i.e. like every 50-60K) and corrosion creeps in? Or is it just cheap plastic that gives out exposing the electronics or motor (or does the motor just wear out)? Blower motors seem to last pretty long but they are not pumping boiling hot fluid through them.
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Old 01-02-2014, 08:12 PM
ctuna ctuna is offline
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I wonder if changing the lifetime fluid

I wonder if changing the lifetime fluid
Would extend the life of the water pump?
I a have also been told the 06 was particularity bad
and the water pump was redesigned.
There is a thread on e90 post with survey number showing about
60 to 90k is and average life .
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Old 01-02-2014, 09:46 PM
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It's odds, and your tolerance to those, coupled with an ever increasing likelihood of a failure as the miles creep up. Once you cross 60K miles, the likelihood begins increasing exponentially but I doubt you'd find a statistically significant sample that will warrant a bullet proof decision, which will match the actual mileage/failure.
A friend of mine, who is a BMW tech, has stated that he gets water pump failure at or above 70K "for the most part" and recommends a proactive swap at 60, that's if you want to be proactive.
I'll buy my replacement at 50K, keep it in the trunk until 60K, at which point said friend can swap it!
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Old 01-03-2014, 07:38 AM
aleks001 aleks001 is offline
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I don't think it's anything to do with the coolant or the mechanical side of the pump. I think if anything the pump is quite sturdy. The issue I believe is something electrical burning out on the pump. Basically more engine heat = shorter pump life. But I could be wrong, this is what I think I've seen around the web, there was a guy somewhere that pulled one of the pumps apart to show that it's an electrical issue.
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Old 01-03-2014, 08:23 AM
jburke4689 jburke4689 is offline
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I have the original on my 2007 335i and I'm at around 99k miles with no shadow codes. A friend I work with has a 2008 335i and his crapped out (with absolutely no warning) last month at 47k. No rhyme or reason but 60k seems about the average. That explains why I won't be taking any long trips in mine until I replace the pump. Planning on doing at 100k. Even at an indy he paid $1,500. I can get the pump, thermostat, and bolts as a package at www.getbmwparts.com for $425. Since I DIY, it make total sense to do the proactive replacement.
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Old 01-03-2014, 08:26 AM
git_yo_own git_yo_own is offline
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Does anyone have any knowledge or theories on the correlation between the water pump's life and the number of years a car is driven? I'm averaging about 7,000 miles/year and won't hit 70,000 miles for another 7 years. I certainly don't want to wait so long that the water pump busts before I replace it, but I don't want to replace the water pump too early either.
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Old 01-03-2014, 08:35 AM
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My water pump started leaking at 108k; but otherwise, the electrical motor still worked just fine. I think my situation is an outlier because it seems the primary failure is the motor burning out. As I now installed the latest 2nd revision (according to the two different part numbers offered), I hope it goes at least another 100,000 miles, which will be long after I've moved on to a different car...
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Old 01-03-2014, 09:02 AM
fb88 fb88 is offline
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2006 330xi I am at 154k miles....
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Old 01-03-2014, 12:19 PM
bigblue99 bigblue99 is offline
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I have a 2009 335 with 62k miles and still have original WP. I don't know how to do this, but it may be helpful if someone can create a poll to see how many still on original within a range of miles and if replaced, what mileage when replaced.
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Old 01-03-2014, 01:04 PM
fun2drive fun2drive is offline
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3/2007 manufactured and 60K miles.
There will be no correlation possible for a couple reasons:
Not the same driving environment (cold weather vs warm weather)
How it is driven hard, easy, grandma
Different wattage pumps (328 is 200 watts 335 is 400 watts)
3 changes to the original water pump to include different manufacturer.

That makes it tough to say oh at XXXXXX miles change it.
I have a new pump and tstat and will change mine this summer and keep the old pump just in case I get stranded I have something to get me home.
YMMV is never more accurate in the case of water pump life...

I also agree it isn't the coolant it is the electric motor that get fried...
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Old 01-03-2014, 02:33 PM
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Yeah I have 97,700 miles on mine when I replaced the pump. I just bought the pump at a BMW dealership and installed it myself. I don't know if the pump had been replaced before I got it, I know the pump I pulled off was a VDO brand pump and I checked with BMW and they said they had no history of them changing the pump (not sure if BMW uses VDO because they sold me a Continental brand water pump). I was just asking because a friend of mine has the same car and his had just went out too, not sure of his miles. I just heard that these cars have a bit of a problem when it comes to water pumps and was just wondering what most people have gotten out of their pumps.
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Old 01-03-2014, 03:00 PM
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Posted this on the 1 site, my 135 has 41K on the spedo. I suspect its a water pump or electronic thermostat.

Last night on my way home from BMW of Sterling (had Sirius XM installed) in the middle of the current VA "snow event" my 135 overheated on I-66. The ONLY advance indication I received that a problem existed was the red over temp icon and a text message in the NAV telling me to stop immediately and turn the engine off. I then noticed a sudden loss of power and the ECU had placed the engine in "limp" mode. Needless to say it was very difficult and dangerous trying to get three lanes over to the shoulder during the height of rush hour in the middle of a near blizzard. Finally reaching the shoulder I turned the engine off and tried to contact BMW without success. So, I sat for 10 minutes and then re-started the engine. I exited I-66 and since I wasn't receiving another over temp indication I kept going and began looking for a safe place to stop and call BMW. I found a service station, shut the engine off and called again. I was put on hold for over 20 minutes and by now my cell phone charge was getting low so I angrily terminated the call, restarted the engine and headed for home. I got another five miles before the over temp light re-activated so I pulled off the road, tried to call BMW and again no help. Since I was close to home I sat for 10 minutes, restarted and limped home. I called BMW from home and finally got an SA who arranged to have my car towed this morning. Needless to say I've been in contact with BMW management throughout today.

Now that I've bored you all with this is there a problem with 135s overheating? I searched the archives and there doesn't seem to be one. Has anyone else experienced this problem?
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Old 01-03-2014, 03:45 PM
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@4ocious when my 335i started to overheat i had the yellow light saying the engine was getting hot and eventually the red light came on and I had to limp home too stopping every 5 minutes and wait 30 minutes for the engine to cool down enough for me to make it another five minutes down the road. The main thing I noticed though was even when the engine was cold from sitting overnight when I went to go start the engine and the fans would automatically kick on super high. So my guess is the car knew the water pump wasn't working and this was its way of trying to keep the engine cool, which of course didn't work. I also felt the lower coolant hose with the engine running which had no pressure and wasn't hot at all which at 210 it should have burned me, so that was another way I knew it had to either be the pump wasn't working or the thermostat went bad in the closed position. I know this doesn't help much being that I didnt really cut it down to either the pump or the thermostat being bad and I don't have the same car, but it kinda gives you a way to kinda figure out if it is either the pump or the thermostat or something completely else without having to take anything apart.
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Old 01-03-2014, 04:26 PM
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BMW towed the car early this morning and I haven't heard from them since. I'm disappointed I didn't receive a yellow caution light before I received the red light. My 135 is still under OEM warranty so I'm reasonably sure it will be repaired. But, this car represented my return to BMW ownership after selling my 03 E39 M5 in 05. However, my wife still has an 06 X3 that she refuses to part with that's been very reliable. Now I'm concerned BMW quality may have slipped a bit. I hope not.
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Old 01-03-2014, 08:55 PM
Toronto Z4 Toronto Z4 is offline
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My water pump blew on my brand new 2009 335 cab within six months...then came the HPFP's........need I say anything more?
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Old 01-03-2014, 11:41 PM
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My water pump blew on my brand new 2009 335 cab within six months...then came the HPFP's........need I say anything more?

Dude...you must have received a 2007 stamped as a 2009 335i! Check your papers!

Last edited by sptt144; 01-03-2014 at 11:44 PM.
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Old 01-03-2014, 11:58 PM
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Originally Posted by aleks001 View Post
I don't think it's anything to do with the coolant or the mechanical side of the pump. I think if anything the pump is quite sturdy. The issue I believe is something electrical burning out on the pump. Basically more engine heat = shorter pump life. But I could be wrong, this is what I think I've seen around the web, there was a guy somewhere that pulled one of the pumps apart to show that it's an electrical issue.
This sounds like a good assumption, I thought about maybe trying to run some water wetter. I heard though that running water wetter with the BMW coolant turns the coolant and nasty brownish color. I don't know if this is true as I've never done it just read about it, but if anybody does know what happens when you run water wetter in your system let me know please.
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Old 01-04-2014, 12:02 AM
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I'm more worried about the oil my car seems to be burning than a water pump that might fail and can be easily and cheaply replaced as compared to a head gasket job I may be facing! Get a back up pump and t-stat if you don't have warranty or CPO and put those bad boys in with some new coolant. I'm sure you will be money for a while. Now a head gasket job....$$$$$
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Old 01-04-2014, 12:12 AM
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Originally Posted by sptt144 View Post
I'm more worried about the oil my car seems to be burning than a water pump that might fail and can be easily and cheaply replaced as compared to a head gasket job I may be facing! Get a back up pump and t-stat if you don't have warranty or CPO and put those bad boys in with some new coolant. I'm sure you will be money for a while. Now a head gasket job....$$$$$
I will probably buy a back up one when I get a little farther down the road, but not after just replacing it. That's a waste of money for a pump to just sit there for so long, and 488.30 dollars isn't a cheap purchase for me.
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Old 01-04-2014, 12:19 AM
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I will probably buy a back up one when I get a little farther down the road, but not after just replacing it. That's a waste of money for a pump to just sit there for so long, and 488.30 dollars isn't a cheap purchase for me.
It is a little steep. I have CPO coverage and am doing a coolant change at 55K along with a walnut blast. We'll see how long that lasts and if the change on my pump happens to help extend the life at all. I am an electronics repair technician and usually heat is is the culprit that melts solder joints and overheats diodes that cause failures. I will request my failed pump to be returned and scope it all out to see what the failure really comes down to when it does and report back.
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  #25  
Old 09-19-2018, 06:00 PM
quiett quiett is offline
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Water Pump Failure

The electric water pump on my 2008 135i (E88) failed a few months ago at 32,500 miles. Worst service I've ever had from a car. I bought the replacement from a supplier called FCP Euro who provides a lifetime warranty on parts they sell. If they fail that often it should be a good deal.

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