01-16-2022, 10:07 AM | #1 |
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X3M differential engagement
Hey all, just got a 2020 X3M a few weeks ago and when at slow speeds and the tire wants to spin, usually when going out of my driveway with the wheel turned, the differential is kicking in and it seems extremely harsh to me. Has anyone else experienced this or is it normal? Thinking of going to the dealer for peace of mind. Thanks I'm advance
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01-16-2022, 10:24 AM | #3 |
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Yeah so it's on solid surface and I understand the engagement process as I have other AWD BMW's. But in this case, it kicks in extremely hard and makes a lout clunking noise which seems to me to be amiss. Would you agree given your experience?
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01-16-2022, 11:43 AM | #5 |
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Yeah I was wondering about that myself. Add in 25 degree weather and summer tires and it could be that plus the tires actually skipping on the pavement. It's just a bit unnerving but I may just hold off until my next oil change and have them check it. Otherwise it performs flawlessly
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01-16-2022, 12:37 PM | #6 | |
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See this tread: https://x3.xbimmers.com/forums/showthread.php?t=1887933
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01-16-2022, 01:04 PM | #8 | ||
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01-16-2022, 01:05 PM | #9 |
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Good to hear. I'm not terribly concerned but just thought it was weird and the car is new to me. Also note, one time it happened in reverse pulling into my side entrance garage where the front wheels were in the grass but the wheel was dead straight which eliminates some of the scrubbing debate
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01-16-2022, 06:02 PM | #12 | |
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Once the winters were put on it immediately stopped. One thing to note, winter tires are not only for snow - they are for cold. Summer tires can be dangerous in cold with no snow in sight - especially so when it is wet/damp. Summers driven in cold can also damage the tires (Continental has a warning on their site). Not to try to convince you into getting winters or all seasons, just FYI. |
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01-16-2022, 06:07 PM | #13 | ||
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01-16-2022, 06:49 PM | #14 | |
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01-17-2022, 08:49 AM | #16 |
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To me it sounds like both lead to what you feel. A cause and effect...
The summer tires at 25F have much less traction. In a sharp turn, the inside rear tire kicks loose for an instant. The M Differential has to immediately compensate and sends power elsewhere. That's what you feel. In warmer weather the tire continues to grip and the differential can smoothly transfer rotation speeds as required. That's my theory at least.....
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01-17-2022, 09:57 AM | #17 | |
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01-17-2022, 09:59 AM | #18 |
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02-02-2022, 12:17 PM | #20 | |
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Did you get temp appropriate tires to resolve? Be super careful if it is below 45 and in any way damp if on the summers. |
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02-02-2022, 12:18 PM | #21 | ||
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02-02-2022, 12:22 PM | #22 |
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Excellent! Many here are happy with the PSAS.
When I got mine they did not exist (or I wasn't aware) so I got winter wheels/tires and switch 2x per year. I'm still not convinced that they handle as good as summers despite what I have read here but I think for most people they will be fine year round. Makes me wonder how many Continentals ended up in the land fill as a result of the X3M.... |
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