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Old 3rd September 2007, 12:05   #1
neuspeeder
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power steering leak?

I went into the dealership last weekend to pick up some oil, and while there (since I'm new to m5 ownership) I asked the guy @ service a question regarding an issue I began noticing. For about a week, every so often I would feel what felt like a buzzing feeling coming through the steering wheel when I made about 90 degree turns or greater. not always, but sometimes.

He suggested I just check to see if I was low on power steering fluid, so while at the dealership I did. to my surprise, the dipstick on the cap registered dry, and I could barely see a puddle of ATF fluid in the reserviour. He thinks I may have a small leak somewhere, so they were kind enough to top me off. I just checked again today, a little over a week later, and I'm still reading between the 2 hash marks, but the ATF fluid does seem to be a slight bit lower. Nonetheless, the buzzing feeling has yet to return.

is this a chronic problem? anyone else experience this? solutions? I have an aftermarket extended warranty, but the dealership is about 2-3 wks out booked, and I'm just wondering if this is really something worth worrying about.

any insight is much appreciated.

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Old 3rd September 2007, 14:22   #2
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Power steering hose leaks on the M5 are common. I had mine all replaced at about 35k miles (43k miles on my car now) when one developed a slight leak. You should be able to see if there is a significant leak or not. Check out the realoem diagram and then inspect the car.
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Old 3rd September 2007, 19:23   #3
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Not to worry just make sure you check the reservoir at all times and top it off...there are two hose for the power steering one is cheap and the other ones is expensive...labor would be around 2-4 hours depending which hose is affected...


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Originally Posted by neuspeeder View Post
I went into the dealership last weekend to pick up some oil, and while there (since I'm new to m5 ownership) I asked the guy @ service a question regarding an issue I began noticing. For about a week, every so often I would feel what felt like a buzzing feeling coming through the steering wheel when I made about 90 degree turns or greater. not always, but sometimes.

He suggested I just check to see if I was low on power steering fluid, so while at the dealership I did. to my surprise, the dipstick on the cap registered dry, and I could barely see a puddle of ATF fluid in the reserviour. He thinks I may have a small leak somewhere, so they were kind enough to top me off. I just checked again today, a little over a week later, and I'm still reading between the 2 hash marks, but the ATF fluid does seem to be a slight bit lower. Nonetheless, the buzzing feeling has yet to return.

is this a chronic problem? anyone else experience this? solutions? I have an aftermarket extended warranty, but the dealership is about 2-3 wks out booked, and I'm just wondering if this is really something worth worrying about.

any insight is much appreciated.
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Old 3rd September 2007, 21:23   #4
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thanks for helpful insight, I'll see if I can visually locate any leaks, and grin & bear a bit longer, at least until the dealer's appt's aren't so booked up.
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Old 3rd September 2007, 21:34   #5
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I've dealt with this problem as have many other e39 owners. Had one leak fixed by dealer under warranty, the other I fixed all while the car still had <30k mi. My repair was quite simple but the complexity depends on where the leak is originating from. From my research most leaks originate from where the hoses meet the power steering fluid reservoir (BMW's one time use hose clamps are prone to failure). I did a little write up a short time ago (see post#6 & 8): Change Power Steering Fluid? Hope this helps.
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Old 3rd September 2007, 21:57   #6
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thanks, yea my car only has 34K on it, so I also thought it odd that something like this would happen so soon......I'll check out the suggested problematic area.
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Old 3rd September 2007, 22:48   #7
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I had that same buzzing feeling and sound when taking hard turns either way. Power steering hose was the problem and was replaced. My car had 41k miles at the time.
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Old 4th September 2007, 05:15   #8
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glad to hear I'm not an "outlier" with this problem......thanks ya'll.
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Old 4th September 2007, 19:07   #9
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Not only an issue with the E39 but also the E36.
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Old 25th September 2007, 12:56   #10
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Doesnt it also leak fro mthe reservoir itself? When I engage hard truns at speed I loose power steering
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