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      11-21-2011, 10:54 AM   #111
JDB30
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Quote:
Originally Posted by m6pwr View Post
May be the difference in warranty policy between BMW Netherlands and BMW North America. Anyone have their in-tank pump replaced in the USA without a code being thrown?
I have. I had a high-pitched humming sound and they replaced it.
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      07-28-2012, 07:23 AM   #112
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Originally Posted by M3RD View Post
It is amazing what a different brand of fuel can do. I switched from the Loblaws Gas Station to Shell and found my car is behaving quite different almost like she is now on some kind of wonder drug
OK....some 'in' Canadian joke?

Perhaps you can 'fill me in' here......

Putting supermarket fuel in the Z4......is this the answer?
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      07-28-2012, 11:58 AM   #113
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Quote:
Originally Posted by Z_Victor1 View Post
OK....some 'in' Canadian joke?

Perhaps you can 'fill me in' here......

Putting supermarket fuel in the Z4......is this the answer?
I should have mentioned the car type it was our DD at the time not the Z4.

BTW this is a very old thread ... driving a M3 now and it only sees V Power Shell Gas
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      07-28-2012, 03:05 PM   #114
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I know for a fact (for my car at least) that Petro-Canada gas made the whining noise. I've switched to Esso for the longest time and never had another episode again.
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      07-29-2012, 11:25 AM   #115
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I am now on the 4th fuel pump, counting the one it came with. The latest one has been quiet for about a month. The two previous ones were fine at first but started the high pitched tone after about 6 mo of use. I was surprised the last time that BMW chose to just put another one in instead of doing something more radical. Fortunately there are 2 1/2 years of warranty remaining for them to hopefully find a permanent fix.
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      07-29-2012, 01:14 PM   #116
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Quote:
Originally Posted by tranquility View Post
I know for a fact (for my car at least) that Petro-Canada gas made the whining noise. I've switched to Esso for the longest time and never had another episode again.
Check out www.toptiergas.com for gasoline comparos

Quote:
Originally Posted by syd53 View Post
I am now on the 4th fuel pump, counting the one it came with. The latest one has been quiet for about a month. The two previous ones were fine at first but started the high pitched tone after about 6 mo of use. I was surprised the last time that BMW chose to just put another one in instead of doing something more radical. Fortunately there are 2 1/2 years of warranty remaining for them to hopefully find a permanent fix.
I'm surprised to see a 2011 with HPFP probs, and 4 to boot. It was the 2011 model that finally got the fuel pump that worked. Makes me think there's something else going on because even if you somehow started out with a bad version, you should have gotten the good pump for a replacement. But 4 times?
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      07-30-2012, 02:17 AM   #117
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Quote:
Originally Posted by jparnes1 View Post
I'm surprised to see a 2011 with HPFP probs, and 4 to boot.
If he's talking about the in-tank pump, that's not a HPFP is it? Unless HPFP means High Pitch Fuel Pump

Mine got quieter after a software update, but now about a year later it's getting embarrassingly and annoyingly loud again.
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      07-30-2012, 10:06 AM   #118
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Yes, I was talking about the in-tank fuel pump.
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      08-04-2012, 07:10 AM   #119
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High pitch fuel pump it is! Just had mine replaced after a year of putting up with it and it's quiet for now but after reading this, it probably won't be for long.
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      08-04-2012, 08:33 AM   #120
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Quote:
Originally Posted by gtrek79 View Post
High pitch fuel pump it is! Just had mine replaced after a year of putting up with it and it's quiet for now but after reading this, it probably won't be for long.
I had mine replaced two years ago and have never had a problem since. You should be okay.
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      08-04-2012, 06:39 PM   #121
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Actually, I was just thinking. Even though some of us no longer have prbs w/ this noisy LPFP, some of us have had to make 'concessions', e.g. avoiding a certain gas brand, remembering not to have more than 1/2 or 1/4 tank empty, etc.
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      08-06-2012, 12:54 PM   #122
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Quote:
Originally Posted by tranquility View Post
Actually, I was just thinking. Even though some of us no longer have prbs w/ this noisy LPFP, some of us have had to make 'concessions', e.g. avoiding a certain gas brand, remembering not to have more than 1/2 or 1/4 tank empty, etc.
Yes, you are correct. Since I have had mine replaced, I have never let the gas tank get below 1/4 and most of the time fill it back up when it is 1/2 or slightly below. I cannot recall where I got the info that this may have been the cause. I have had the high pressure and low pressure replaced. The high pitched whining sound coming from the rear is the LPFP. I never experienced any problems with the HPFP, but they replaced it because of the recall.
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      08-06-2012, 02:55 PM   #123
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I only fill past 1/2 tank when I'm on a road trip. The ~50lbs less weight in fuel helps to compensate for my fat ass....the 500bhp helps too.
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      08-12-2012, 06:12 PM   #124
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Quote:
Originally Posted by Roadstergal View Post
Yes, you are correct. Since I have had mine replaced, I have never let the gas tank get below 1/4 and most of the time fill it back up when it is 1/2 or slightly below. I cannot recall where I got the info that this may have been the cause. I have had the high pressure and low pressure replaced. The high pitched whining sound coming from the rear is the LPFP. I never experienced any problems with the HPFP, but they replaced it because of the recall.
Funny, mine only made the noise between full and 1/2 tank. It was perfectly quiet below 1/2 tank so I hated to refill the tank.
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      08-13-2012, 12:40 AM   #125
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Quote:
Originally Posted by gtrek79 View Post
Funny, mine only made the noise between full and 1/2 tank. It was perfectly quiet below 1/2 tank so I hated to refill the tank.
When I had the prb, it didn't matter how full tank was...
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      08-13-2012, 06:28 AM   #126
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Quote:
Originally Posted by tranquility View Post
When I had the prb, it didn't matter how full tank was...
True, when I had the problem, it also did not make a difference how full the tank was either. I was told that it my be beneficial not to allow the tank to get much below a half tank. Anyway it has been two years since I had it replaced and no problems no matter how much gas I have in the tank.
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      08-13-2012, 11:04 PM   #127
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Back in the day, when your pump was making noise, there was some rumors flying around that BMW's fuel level sensors were contributing to the HPFP failures due to the split tank. I recall I suggested keeping your tank full to see if the humming would go away. I was wrong, but that's a good thing because no one wants to have to deal with that all the time. BMW came up with a good, long-term solution.

As a general rule, regardless of make/model filling at around a 1/4 tank is good idea for the life of your in-tank fuel pump, however.

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      08-14-2012, 01:34 AM   #128
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Quote:
Originally Posted by Roadstergal View Post
True, when I had the problem, it also did not make a difference how full the tank was either. I was told that it my be beneficial not to allow the tank to get much below a half tank. Anyway it has been two years since I had it replaced and no problems no matter how much gas I have in the tank.
+1 here. No issues on this for the last two years since the replacement (knocks on wood). I always fill up close to empty.
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      04-10-2013, 04:39 PM   #129
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Our 2009 has the hum now. Went away for awhile and perhaps the warmer temperatures have brought it back - 77 degrees now.

Anyone have an update on their experience with BMW's recent replacement policies with the LPFP? Have 5 months left on warranty.
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      08-05-2013, 11:42 AM   #130
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Took our 2009 Z4 in for the in tank fuel pump noise, and the dealer replaced it under warranty. They told me that there was a bulletin that provided they should replace the fuel pump if the customer complains of noise. I was very happy to hear that BMW had taken this position. I was surprised to learn that there is a large access port in the tank that unscrews and allows access to the in tank pump and fuel filter (also in the tank under the fuel pump).
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      08-05-2013, 10:41 PM   #131
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I've had this same exact problem, but for an M54 engine E85. I think this is a problem for all Z4's. I was told since i wait until the gas light comes on, bmw tank pumps don't work well and wear out faster unless the pump is always swimming in gas.

Moral of the story, 3/4's is when i fill it up.
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      08-06-2013, 03:48 AM   #132
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My dealer also replaced the low pressure pump back into 2009 because of a 'humming' noise. After a couple of months the noise returned and disapeared again.

At the moment, ~55000 Km later the noise is in rare occasions noticeable.
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