Suspension Airbags Replaced

Shortly after the first service, the rear suspension airbags - on both sides - failed completely.  There were no fault codes.  But, the car was metal-on-metal in the rear and it was obvious.  We had to have the car towed to the dealer again.  The dealer was very nice, they believe they must have cut or scored the airbag material during the fix of the differential leak.  The airbags retail for $398 each.  You can replace them quite easily DIY, all from below the car.  Hopefully you never have to.

First Dealer Service

Took the car in for it's first "free" oil change at about 10,600 miles.  We used Rick Hendrick BMW in Charleston and they did a nice job.  They fixed the leaking differential seal and put new oil into the differential.  They confirmed on the F15 there is no drain plug for the differential.  So to change it, you either remove the rear cover or you use a fluid extractor.  I come from the old school and I like to change fluids on a regular basis.  You can see the part number for the correct fluid below... FYI cars with Dynamic Handling Package (DHP) have a different differential but both use the same fluid.

They used 0W-30 for motor oil.  We have been using 5W-30 with excellent results: no oil is burned by this car.  But, the manual for the 2016 does say that 0W-30 is the preferred oil, so we'll try it I guess.  I am going to continue to change the oil every 5,000 miles so we will alternate free / me until the free service runs out.

The car used three 2.5 gallon containers of AdBlue.  Not sure what the exact tank volumes are for the active and passive tanks, but that's a lot of AdBlue!

One of the techs did manage to scratch the intake plenum in the engine bay.  We mentioned it to the service advisor and he agreed to replace it without question.

We asked about diesel fuel contamination and the service manager reported they rarely if ever see it.  Much more common is people putting gasoline into their diesels.  We asked how common the leaking differential is and he didn't think it was very common on the F15 but they did see it often on the E70 X5s.

Details of the oil change.  Note the AdBlue Diesel Exhaust Fluid.  Part number is for a 2.5 gallon jug.  Also note the -951 oil part number, that's 0W-30 LL12.

Parts reacquired to fix the leaking differential.  Some hardware is one-use-only.  The differential did have to come off the car for the fix but the rear subframe did not.  They did do an alignment on the car once the new eccentric bolts were installed.  Part number for F15 X5 differential oil is shown there too, you need 2 liters for a change.

Wet differential

When I jacked up the rear end of the car to fix a punctured tire, I saw this.  I have seen at least one other post about a leaky rear differential.  I iwll mention this to BMW at the first service.  The leak is minor, but it should be dry there.

How to Jack an F15 X5 (rear)

Haven't seen any posts on how to do this.  Here is how I did it.  As always, feel free to do it your way.

On many of the newer BMWs, I have seen BMW official documents that say it is OK to jack using the rear differential.  This is unusual to me because on cars like the Z3/E36, this was forbidden.  So I'm not comfortable with it.  Still, I could not find any official BMW documentation on F15 jack points.  I haven't bought a 24-hour subscription to TIS yet to verify.

I needed to jack up our car to patch a puncture in a run flat tire.  This is the second puncture in less than 10,000 miles.  Bummer.  For the first patch, the tire guys (Hay Tire Pros in Charleston) scratched both the rim and the Xpel on the front bumper.  Not cool.  I will never go there again.  For this repair, I am taking the wheel (not the car) to my wheel guy, Hugh Jett at Jett Wheels of Charleston.  Hugh doesn't normally do tire repairs but he will for previous customers.  Anyway, I jacked up the car to put it on jackstands while Hugh fixes the tire.  I used the rear subframe as my jackpoint.  To access it, the jack needs to go in under the car at an angle because the center input pipe to the muffler is in the way.  I used a piece of 2x4 to help spread the load.  Worked like a champ, no issues.  Esco jackstands work perfectly with the F15 side jack pad receivers.

UPDATE: Bimmerpost member E90Fleet posted this diagram directly from TIS.  It shows you can jack directly by the differential.  That still scares me.  Also shows the front jack point and mentions you can jack by the outboard subframe points in the rear.

F16 Leather Knee Pads

For this mod, I followed the excellent how to provided here:  http://f15.bimmerpost.com/forums/showpost.php?p=20110778&postcount=1

The only deviation/change I have is with respect to installing the passenger side knee panel.  The F15 X5 center dash does angle slightly towards the driver.  It is not as obvious as say the E30 center console, but it is biased to the driver.  This creates a clearance issue for the passenger side panel.  The front clip of the knee pad cannot mate with the female slot on the center console.  There isn’t enough space.  My solution, which wasn’t mentioned in the link above, was to leave the 2 T20 silver screws out of the new bracket (comes with the knee pad part).  This way the bracket can float a little.  Dock the metal locking tab into the center console completely.  Then drive home the 2 silver T20 screws from the passenger side.  This will help greatly.  In fact, I cannot see doing it any other way without scratching something.  Other than that, this is a great mod.

51169299125, Left Knee Pad, Black Dakota Leather with Black Stitching, $263.14r

51169299126, Right Knee Pad, Black Dakota Leather with Black Stitching, $263.14r

Total cost of this mod = $526.28r

Total investment in vehicle to date = $3721.40

"Before"

"After"

Second Oil Analysis Report

I changed the oil again at about 5,000 miles.  After the first change, I wasn't thrilled with how the oil looked.  It was jet black.  And very thin.  Maybe that's a diesel thing and I am new to it.  Anyway, I tested it again.  And again, the results do not look great to me, but I am comparing them to the results I am used to from classic BMW gasoline engines.  I don't like seeing copper show up.  Usually that would be from bearing wear.  The iron seems high too.  I will keep tabs on this engine for sure.

Note that Blackstone incorrectly assumed I was using Castrol Edge LL04 oil.  That is wrong.  I am using only BMW-branded (Shell) LL04 diesel oil.

I do feel good about NOT waiting for the "free" oil changes.  The intervals seem way too high.

On the brighter side, this engine seems to burn no oil.  Zero.  Zip.  Nada.

First Oil Analysis

I have been in the habit of using Blackstone Oil Analysis since I have owned my S54 M coupe.  I tested the first oil used in the X5 too, here are the results.  I am concerned about the iron and copper readings.  Will continue to use Blackstone until those stabilize.