[S2000M5]

Had my 2022 X5MC serviced at 10K miles today; an oil change and microfilter replacement.

Tech noticed a defective rear differential and SA recommended immediate replacement (luckily, under warranty)

I was taken inside the shop and shown a loose driveshaft movement; that is the tech is able to slightly wiggle the driveshaft...

Is this movement normal? Is there a known differential issue with the F95?

I searched the forum and can't find any info that points to such issue...

[BobsM3Coupe]

I don't think I read of any rear diff failures on the F95. Did you notice any noise from back there? Wiggling seems more like it might be the flexible disc at the end of the propeller shaft. And at only 10K, that sounds hard to believe. Unless heavy use of launch control was used?

[S2000M5]

Originally Posted by BobsM3Coupe

I don't think I read of any rear diff failures on the F95. Did you notice any noise from back there? Wiggling seems more like it might be the flexible disc at the end of the propeller shaft. And at only 10K, that sounds hard to believe. Unless heavy use of launch control was used?

I didn't notice any noise but the SA did just when he drove the car from the valet area to the shop at the back.

I did not launch the car even once...

Is the disc you are referring to supposed to be flexible? I am trying to asses if a replacement is even necessary...is the dealer just being cautious?

[BobsM3Coupe]

Originally Posted by S2000M5

I didn't notice any noise but the SA did just when he drove the car from the valet area to the shop at the back.

I did not launch the car even once...

Is the disc you are referring to supposed to be flexible? I am trying to asses if a replacement is even necessary...is the dealer just being cautious?

It would be nice if you could obtain a video of the wiggling they are talking about.

[MADBMWX5MC]

This is an interesting development, one that will get a lot of folks attentions, would be interested in knowing which part they replaced for a fix once you get the invoice--unless they are really replacing the whole thing. Thanks for posting

[S2000M5]

Originally Posted by MADBMWX5MC

This is an interesting development, one that will get a lot of folks attentions, would be interested in knowing which part they replaced for a fix once you get the invoice--unless they are really replacing the whole thing. Thanks for posting

Will certainly post developments!

The SA said the noise is coming from driveshaft internal gears. Not going to hear it as much when inside the car and will continue to worsen over time.

I can't hear anything but there is a very slight jolt when coming to almost a complete stop and then driving off which kinda make sense if the linkage of the driveshaft and the differential is loose, as shown by the tech.

Going to try and take a video when she goes backk next week...

[BobsM3Coupe]

Originally Posted by S2000M5

Will certainly post developments!

The SA said the noise is coming from driveshaft internal gears.

???? Driveshaft has no internal gears. I suppose the uninformed SA (most times they they don't know much about cars) meant the differential?

[S2000M5]

Originally Posted by BobsM3Coupe

???? Driveshaft has no internal gears. I suppose the uninformed SA (most times they they don't know much about cars) meant the differential?

I was thinking the same...he might have misspoke.

[Cobra_X5MC]

Yeah the SA’s don’t always know much which is oddly concerning.

One was asking another SA if my X5 was the M series lol…

[S2000M5]

Here are the videos:

https://concreateusa.egnyte.com/dl/kqYpc6FUQ4

https://concreateusa.egnyte.com/navi...b-a447bc2daa24

SA said this morning they replaced rear diff for X4, M5 as well...

Also mentioned that it gets worse over time and better handled under warranty...

[BobsM3Coupe]

1st video is to blurry for me to see the driveshaft wiggling around.

[Alan l.]

Def looks like there is some internal play with the rear diff.

[S2000M5]

Originally Posted by Alan l.

Def looks like there is some internal play with the rear diff.

Yup, exactly. That's why they replaced it and whether it is a placebo or not, car feels much tighter now.

[Dgjo2022X5MC]

Too soon for a failed guibo (hard rubber disc between driveshaft and diff flange. Sort of a softish hockey puck). That takes many years of heat exposure for cracks to form around the integral bolt sleeves.

I couldnt open videos. A little movement is normal, but it should not be anything significant. Certainly no clunking!

Can’t say I have ever heard of a M diff failure. Perhaps there was a loss of fluid along the way? Maybe run-in service wasn’t done right? I lost a xfer case to a gasket leaking oil, but that manifested like a misfire as the toasted clutch packs struggled to transmit torque. There are clutch packs in the M diff as well to send power appropriately.

Good to hear it was replaced!

[S2000M5]

Originally Posted by Dgjo2022X5MC

Too soon for a failed guibo (hard rubber disc between driveshaft and diff flange. Sort of a softish hockey puck). That takes many years of heat exposure for cracks to form around the integral bolt sleeves.

I couldnt open videos. A little movement is normal, but it should not be anything significant. Certainly no clunking!

Can’t say I have ever heard of a M diff failure. Perhaps there was a loss of fluid along the way? Maybe run-in service wasn’t done right? I lost a xfer case to a gasket leaking oil, but that manifested like a misfire as the toasted clutch packs struggled to transmit torque. There are clutch packs in the M diff as well to send power appropriately.

Good to hear it was replaced!

Thanks for your input! Here are the videos:

https://concreateusa.egnyte.com/dl/7FNMQUxW25

https://concreateusa.egnyte.com/dl/XbzC1mwHYK

[MADBMWX5MC]

Def can hear the clunking sound on both, more on the second one of course.