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BMW 3-Series (E90 E92) Forum
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Water Pump Survey - Died or Not?
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View Poll Results: Is your original water pump dead or alive? at what mileage? | |||
Still working; < 60,000 miles | 188 | 27.53% | |
Replaced with least than 60,000 miles | 73 | 10.69% | |
Still working; 60-75,000 miles | 88 | 12.88% | |
Replaced between 60-75,000 miles | 49 | 7.17% | |
Still working; 75-90,000 miles | 85 | 12.45% | |
Replaced between 75-90,000 miles | 45 | 6.59% | |
Still working; 90-105,000 miles | 54 | 7.91% | |
Replaced between 90-105,000 miles | 17 | 2.49% | |
Still working; 105-120,000 miles | 28 | 4.10% | |
Replaced between 105-120,000 miles | 18 | 2.64% | |
Still working; 120,000+ miles | 21 | 3.07% | |
Replaced with greater than 120,000 miles | 17 | 2.49% | |
Voters: 683. You may not vote on this poll |
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02-23-2013, 11:17 AM | #23 | |
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02-23-2013, 05:07 PM | #24 | |
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Changes at 60k feels a bit early for proactive replacement, but if you really don't want to be stranded it could be worth it. If I make it to 90-100k without failure, it will definitely get replaced.
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02-24-2013, 03:11 AM | #26 |
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Water pump failed at 73k
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02-24-2013, 10:05 AM | #27 |
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2008 at 60k miles, no problems. Installed the vishnu PROcede, BOV, and dual cone filters
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02-24-2013, 01:15 PM | #28 |
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They all fail. I have had 4 new BMW cars in the past 6 years and 3 out of 4 have had electric pump failure and 2 needed a tow to the dealer
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02-24-2013, 07:10 PM | #29 |
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02-24-2013, 07:23 PM | #30 |
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Friend of mine just had his die 2 days ago. 2008 with 60 something on the clock. has had DP's, exhaust, intake, FMIC, tune for the last 10k or so
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02-24-2013, 08:01 PM | #31 |
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2006 E90 59K miles, radiator fan coming on at odd times, dealer diagnosed as pump starting to fail. Replaced pump, thermostat, did a radiator flush at the same time.
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02-25-2013, 03:57 PM | #32 |
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anyone know if you can read water pump pre-failure codes with an OBD tool or bavarian technic tool? Is it worth checking regularly to see if anything weird comes up?
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02-25-2013, 04:18 PM | #33 |
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Looks like E90 water pumps are a hot topic, so I'm hoping someone here might have some answers. Participated in the poll, but would like to know if anyone has had these symptoms prior to replacement/failures.
About a month ago, my wife was driving my 06 N52 330i with 106K and called me to tell me the temp warning came on, quickly followed by the overheat warning. She noticed no warm air was entering the cabin, even at full heat settings. I'm not sure if it went into limp mode, but I assume it did. She was near her destination, so she parked and let the car sit while she was inside.. let's say 30 minutes. Car then ran fine for the 15 min drive home, and then did not happen again until a few weeks ago. I was driving this time, and noticed not long after I got in the car (on a cold morning) that no heat was entering the cabin. I anticipated a warning light, so I took it easy. Within 5 min, I got the yellow temp immediately followed by red overheat warning. Car entered limp mode and allowed me to reach my destination a few miles away. Now, being the shadetree mechanic that I am, I decided to pop the hood and check things out, since there were no other warning signs or symptoms of overheating.. There was no sign of engine overheating, and I could even remove the overflow tank cap within just a few minutes. 5 min later we drove the car home and had no issues for another week. A few days ago, it happened again, but this time I only rec'd the Yellow warning. Drove 10m miles to destination, was inside 10 min, and has ran fine since. At 106K miles, I know I'm on borrowed time and should probably just pull the trigger and replace it all, but I would like/need to know if is this a pending failure, or perhaps something else? Temp sensor maybe?
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02-25-2013, 04:39 PM | #34 |
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02-25-2013, 08:53 PM | #35 |
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Really? So, the car warns me of a pending failure by duplicating the symptoms of an actual failure? Brilliant! I must be lucky then...
With all these electronic monitoring and warning systems, I wish it would just say "Hey, your water pump is about to fail.. sell your left arm"
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02-25-2013, 11:21 PM | #36 | |
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This is happening to me.
A month ago, car overheated, yellow temp light, then red temp light. Pulled over, opened hood, car had puked coolant. I assumed water pump was fucked. Let it cool down, restarted without the cap off, and... i see the coolant pumping (small hose on expansion tank will piss coolant into tank). Drove home. No issues in a month. Today...... Yellow light, Red light, Pull over, cool down, remove cap, start car, coolant is flowing, top off with hose and drove home another hour with no issues. My thoughts.... Both times, the car has puked, the coolant system is boiling or the cap is weak and the coolant blows out under the hood. Both times, like you said, the heater quit working which makes me think either there was air in the heater core or the pump had quit circulating. Both times, a simple off-on cycle has fixed it. Quote:
Last edited by mike3000fl; 02-25-2013 at 11:43 PM.. |
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02-28-2013, 05:51 PM | #37 | |
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02-28-2013, 09:46 PM | #38 |
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Everyone, I have compiled initial statistics based on 106 responses so far.
This gives the failure probability and the +/- 95% confidence intervals for that failure rate. Obviously, we need more data points to get more confidence, especially at higher mileages. Everyone help out by voting! Also, there will likely be a skew towards more failures given that many people with healthy water pumps may not check out the thread. The plot gives the failure rate as a function of mileage. In the x-axis I list the total responses for each mileage bin. For those of you interested in the calculation details: Total response in each bin = n_i Failure probability for each bin (p_i): p_i = #dead_i / n_i 95% Confidence Interval (CI): CI_i = +/- 1.96*[ p_i*(1-p_i) / n_i ]^0.5
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03-01-2013, 12:10 PM | #39 | |
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03-01-2013, 02:13 PM | #40 |
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Exclusing everybody < 60000 miles, 77% didn't have any issue.
23% failure is HIGH and obvious recommendation would be a preventive change if you intend to keep the car. Except vbefore doing so, we would definitely need separate the following. 2006 2007+ N52 N54 Again, I don't think that the 2nd category would necessarily need this, but 1st and 3rd - yes. |
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03-01-2013, 06:02 PM | #42 | |
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Let's see if we can accumulate a few hundred more votes. The picture is clearly very sketchy at the high mileages, but having 40-50% failed by 100k miles seems possible based on the limited data so far. The N52 survey mentioned in the OP showed about 25% failed (~40 of 160), though failure mileage was not tracked directly.
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03-01-2013, 08:42 PM | #43 | |
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It's happened once more since my last post. Off/On cycle after sitting for 5min did get me to destination and back, but noticed low coolant level so I topped off with some distilled and drove it another day to work ~15 each way with no issues, although I do have a bit of a whine in the engine compartment. Not sure if that is related to this issue, since it's an electrical pump. It might be tensioner pulley (which has been replaced once already).
Don't need the headache, so it's now parked and I've ordered Tischers WP/Therm kit. $500 shipped w/coolant. Parts will be here Monday, so I will tear into it tomorrow to get a jump.. need this back on the road! Hopefully this will make it go away. Will let you know! Quote:
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03-02-2013, 11:10 AM | #44 |
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Bought my 2008 335 two weekends ago, CPO. This past Wednesday on the way to work, I notice the fan came on loud while sitting at the stoplight a mile from my house. After entering the freeway, I got the 'water temp high' warning followed a minute later by the 'water temp too high, stop the engine' warning. I pulled over and called BMW roadside assistance. They dispatched a tow truck. I called my SA and gave him a heads-up and he had a 2013 328 waiting for us when we got to the dealership. He called 6 hours later and said the car was ready. They replaced the water pump, bolts, topped off the coolant and pressure tested the system. No charge since we'd only bought the car ten days prior.
Car has 51000 miles on it, build date of 10/07, bone stock. Last edited by MountainStone; 03-02-2013 at 04:15 PM.. |
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