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Update: I brought it into BMW, and the road test came back inconclusive. They did a visual inspection, checking the control arms, links, etc. Once again, inconclusive, but the decided to ignore the fact that while my cars alignment is not only in spec, but perfectly within spec, the front right...

Yes, the car is currently under warranty, but the front differential noise is so minor that any technician will likely dismiss it. I am very in tune with this car and noticed something was off long before I received the oil analysis reports. When I got close to the wheel arch, I heard a...

Attached to this reply, you will find the rear differential baseline and the two samples taken as of the current moment. I'm sure you can see by the data where my suspicion of mixing the fluids comes from. Photo 1: The data for the two rear differential drains I have done. Photo 2: Baseline...

Hello friends, I hope you are all doing well. I wanted to provide an update on my most recent drain interval, which was 264 km with 12,699 unit time. During this interval, I removed the magnetic plugs, as I promised before. After some simple calculations, I noticed that the differential is...

I would expect BMW to pull engine log data on an extreme failure like my engine, not a front differential. That would be a bit extra, no?

1. The first sample is 10k without track time. 2. The second sample is 1.6k with 450kms ish of track time + distance driven to the track 3. I have all the receipts from BMW as I provide the parts to my ASE certified mechanic. All of those parts except for the plugs are all genuine bmw. The act...

To inspect the differential itself and open it up would cost a fortune at BMW labour rates. My only option is to push for oil analysis, just like they would in order to void the warranty on my engine if it blew up today, and have them see in the report that there is something out of place with...

Part numbers are different, almost identical in design. You are missing my point. If they are that similar, there is no reason to dismiss that fluid and say its "lifetime" and not do a break in service the same way the M cars do. The oil analysis in the rear diff and rest of the drivetrain...

I drive spirited and bring it occasionally to the track. It just went to the track, you can see the notes on the oil analysis. The un-even wear was already present before it went to the track for the first time. I do not change my own fluid, I send it out to a shop and call it a day. I would...

No, the car has no issues apart from the tires appearing to have a decent amount of un-even wear on the front right tire that is not present on the rest of the car. My first thought was the actual alignment may have caused an issue because these x-drive systems are insanely sensitive, but the...

New plugs have already been purchased. Fluid will be changed later this week and some time will be left to pass so the fluid contaminates, and then I will bring it to BMW.

No, I am waiting for my dad to come back from his trip so he can help me with this. I have had other issues with BMW in the past, and nothing seems to get done until he walks in there and makes things get done. Dunno, guess he's just better with people considering he's the best sales person...

What do you mean by monkeying with it? By changing fluids preventatively? Huh? "Do not mess with it further or not use factory fluid on any driveline component." Brother, I have already said multiple times in this thread that I only use ORIGINAL BMW fluids in this car.

The differential is absolutely the same as the M-cars; per BMW technician training documents (which I have spent hours before reading in the BMW TIS — technical information system) (no ///Marketing or other crap; these documents MUST be accurate or a technician could get hurt, and that opens up...

I did some research and found that while front diff failures in BMWs are not very common, they do occur. Many of these failures seem to happen on the X5 G05 (same generation as my M240) SUVs, which use the same front diff system. Several people who experienced these issues were quoted...

I mentioned above that I only use BMW original fluids.

Thanks for the feedback. I've faced a lot of criticism in the BMW groups I'm part of for wanting to service the drivetrain on my car, which sees a fair amount of spirited driving on backroads. They insisted that my car is a "fake M" (which, technically, it is) and therefore doesn't require a...

I always use original BMW fluids for my BMWs because these components are highly sensitive to anything that's not BMW OE. I've seen people use RedLine diff oil in these diffs, and I completely disagree with that approach. A handful of people I know have developed issues with it. The only part...

The noise is very little and is not easily noticeable unless you are like me and drive this car frequently, and you are very in tune when something feels off. And no, I am not confusing it with injector tick, I am aware of the infamous injectors on the B58TU engine. I can only hear it under...

The fluid in my M240, like all BMWs, is considered "lifetime," but I’m skeptical of that claim, especially for gear oil. Keeping a gear oiI in for the "lifetime" of the car is stupid, and no such thing exists… every single member here would surely agree with me. Anyways, I thought about showing...