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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 07-17-2013, 08:33 AM
Dale Conrad Dale Conrad is offline
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Exclamation 2007 X3 rear diff oil change

Based on the information I have gathered from BMW Hickory, N.C. and Redline oil
teck line 1-800-624-7958 Ca. My rear differential takes 2.1 pints and the front takes
1.5 pints, so two quarts should be sufficient for both. My rear differential is small, based
of vehicles I have had in the past, and since BMW has these manufactured to their
specifications there my be different capacities for different years. The part number on
the bottom rear of my 2007 is 7 508 903. So, I am looking for confirmation from other
owners of 2007 X3si for capacities. If push comes to shove, I can extract the existing
fluid (no drain plug), no apparent leaks, to determine quantity. The Redline oil
recommended is Red-57904 14.95 per quart from Summit Racing 800-230-3030. This
oil has friction modifiers so will work OK in standard or limited traction differentials.
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  #2  
Old 07-17-2013, 08:51 AM
al_macaroni al_macaroni is offline
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On my 2008, which is also an LCI model, I used 2 quarts total for both differentials. I used Red Line 57904 75W-90 Synthetic Gear Oil.

I filled the front differential first. It had both a fill and drain plug. I used approximately 1/2 quart of fluid.

The rear differential took approximately 1.3 quarts of oil. The rear only had a fill plug. I had to remove the 3 bolts holding in the spare tire carrier to shift the carrier to the side to be able to access the fill plug. I used a Harbor Freight multi-use transfer pump to pump out the fluid in the rear differential. http://www.harborfreight.com/multi-u...ump-66418.html.

I had a slight amount of fluid remaining from the original 2 quarts at the end of the job.

Happy DIYing
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Last edited by al_macaroni; 07-17-2013 at 08:53 AM.
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  #3  
Old 07-17-2013, 10:18 AM
rdconrad rdconrad is offline
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2007 X3ri rear diff fluid change

Thanks Al , It is good to know what I am going to do on a task I have never performed.
I noticed when I was under the rear that the tire carrier was an obstruction. So, I will
use your suggested solution to access the fill hole.
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  #4  
Old 07-17-2013, 10:26 AM
rdconrad rdconrad is offline
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2007 Xri diff fluid change pump

Al, I have/had the same pump from Harbor Freight. The second time I used it, which
was this past weekend, while trying to pump in transmission fluid, the inside plunger
broke away from the push/pull shaft. I bought a pump from NAPA for 14.49. Hope
your Harbor Freight pump lasts longer than mine, which is now in the trash can.
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  #5  
Old 07-17-2013, 10:26 AM
al_macaroni al_macaroni is offline
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This is the DIY thread I used.

http://www.bimmerfest.com/forums/sho...d.php?t=489580

Look at post # 11 for how to remove the push-pins in the front stiffener pan. I did have a short 14mm hex, for the rear fill hole. But, I did not have enough room to get the pump hose in there. That is why I had to move the spare tire carrier to the side. See post # 2.
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2013 535i - ED, Oct 2012 | Cashmere Silver | Oyster/Black Nappa Anthracite | ZCW | Sirius | Air Blue 80
2008 X3 | Monaco | Sand/Black Light Poplar | ZAP | ZPP | ZCW | Xenon | Rear Fog
1988 Grand Wagoneer | Burgundy | Ghost Flames | 360 ci | Holley carb

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  #6  
Old 07-17-2013, 10:47 AM
al_macaroni al_macaroni is offline
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Quote:
Originally Posted by rdconrad View Post
Al, I have/had the same pump from Harbor Freight. The second time I used it, which
was this past weekend, while trying to pump in transmission fluid, the inside plunger
broke away from the push/pull shaft. I bought a pump from NAPA for 14.49. Hope
your Harbor Freight pump lasts longer than mine, which is now in the trash can.
This was the first time I have used this pump. I had it laying around as a backup. I got my $4 out of it. I was going to use a suction pump that looks like a grease gun, that works in reverse - but the tube would not bend appropriately to reach the bottom of the differential. I didn't have the time to make a custom bend attachment. So, I just grabbed the harbor freight pump.

What I have been using to pump in gear oil is the sta-lube pump http://www.harborfreight.com/sta-lub...ump-40714.html
The bad part is, it does not fit into the Red Line bottle. I've been keeping around an old Amsoil diff fluid bottle to use with this pump. This one has lasted through 6 differential fills and 2 transfer case fills over the past 5 years. Just this last time, the nozzle at the end would no longer stay on. Otherwise, this pump is easy to use and fills fast.

Going with the NAPA pump will hopefully prevent a tool failure during the middle of your job.

Good luck
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2013 535i - ED, Oct 2012 | Cashmere Silver | Oyster/Black Nappa Anthracite | ZCW | Sirius | Air Blue 80
2008 X3 | Monaco | Sand/Black Light Poplar | ZAP | ZPP | ZCW | Xenon | Rear Fog
1988 Grand Wagoneer | Burgundy | Ghost Flames | 360 ci | Holley carb

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  #7  
Old 07-17-2013, 07:25 PM
timarnold timarnold is offline
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Not to state the obvious, but you should always remove the fill plug before the drain plug. That way, you know you will be able to remove the fill plug and you won't be left with an empty differential & no way to fill it.
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  #8  
Old 07-21-2013, 08:29 AM
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Topaz540i Topaz540i is offline
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Yhe rear has no drain plug from what i understand. You are forced to do it all thru the upper fill hole.
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  #9  
Old 07-21-2013, 12:57 PM
rdconrad rdconrad is offline
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Rear diff oil change

You are correct Topaz, no drain plug. In order to gain access to the fill plug
on 2007 X3, I had to remove the three bolts holding the spare tire carrier
in place, then move it aside. Still tough to properly position a drain hose
but can be accomplished.
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  #10  
Old 07-21-2013, 02:44 PM
Supercourse Supercourse is online now
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Quote:
Originally Posted by rdconrad View Post
.... Still tough to properly position a drain hose
but can be accomplished.
Yes, having removed those 3 bolts, I felt it worthwhile to remove the carrier entirely.
Gives you a chance to clean it off.
(And get familiar with how the lowering mechanism really works, so you don't have to find out by the side of the highway on a wet night.)

A few people have reported they have a drain and a fill plug on the rear diff.
Doesn't seem to be by year, so might be one supplier to BMW built a few diffs. with 2 plugs, intentionally or otherwise.
That could also explain why the capacity of these diffs. seems to vary a bit.
I don't think the positioning of the fill plug in the casting can be identical between suppliers.

My 2004 has just the one plug on the rear diff. and took a bit under 1L (maybe about 1 U.S. qt. exactly).
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  #11  
Old 08-12-2013, 12:40 PM
dbz426 dbz426 is offline
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What do we do after undoing the three 14mm bolts to remove the entire lower mechanism?
The upper bracket is kinda trapped between the anti-roll bar?
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  #12  
Old 08-12-2013, 12:57 PM
Supercourse Supercourse is online now
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Quote:
Originally Posted by dbz426 View Post
What do we do after undoing the three 14mm bolts to remove the entire lower mechanism?
The upper bracket is kinda trapped between the anti-roll bar?
You just have to wiggle it out by moving the whole assembly side to side.

Looks like it won't do it, but it does.
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