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SUVs BMW X3 & X5 BMW X3 hesitation on acceleration
226 messages, Last post on Nov 21, 2009 at 11:16 AM
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I have an X3 on order, should arrive any day ! When I test drove an X3 I noticed a hesitation from a standing stop. The salesman said it was due to the cold and a cold engine. However, I have noticed this topic on other forums: http://bimmer.roadfly.com/bmw/forums/e83/8257513-1.html Some have mentioned that a computer fix will take care of it. At any rate, I am leasing a BMW, in part, for their reputation for preformance,handeling,etc. I'm also a bit troubled about CR recent "below average" reliability rating. Are there any current owners who can shed any light on this........I guess I'm having some buyers remorse before taking delivery ! |
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Replying to: cincyart (Mar 05, 2007 10:09 am)
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Replying to: drjcool1 (Mar 05, 2007 3:28 pm) but a brand new BMW should be flawless. IMO, thats why they get the big bucks.
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Replying to: cincyart (Mar 06, 2007 4:37 pm) It's not my words..... I've had my '05 X3 for about 18 months now and I know how it works. He's had his even longer. Listen up here folks, here's the deal: In DRIVE mode the trans software is programed to start off in second gear as an economy measure to help save gas. BMW did that on purpose. If you're fairly light on the throttle it will stay in Second, accelerate, and eventually shift into Third, Fourth and Fifth. Try it out and count the shifts. (You may need to watch the tach to notice the shifts, this trans can be really smooth at very light throttle and the higher gear shifts may only vary a few hundred rpm) But if you put a little more foot into the throttle on take-off (i.e.: from a dead stop) the trans will shift down from Second to First to give you better acceleration. This is what it is suposed to do. It happens in an instant but you can still feel the car start to move, then "hesitate" from the shift, and then take off. If you have a light enough foot it may never even happen to you. If your foot is rather heavy you may notice it more at first but it will "teach" your trans really quick that you want a fast start most of the time. Now in SPORT mode the trans ALWAYS starts in first, thus no "hesitation". The drawback to always using SPORT mode to avoid the "hesitation" (gear change) is that it almost NEVER shifts into Fifth gear in city driving. The vehicle has to reach a certain speed before it will upshift to Fifth. That can really hurt your mileage in town if you never get over 35-45 mph. AND your trans never gets a chance to "adapt" to your style in DRIVE mode. The software that controls the transmission does "learn" your driving habits after some time. That's why they call it "Adaptive Transmission Control". The computer uses throttle position and vehicle speed to determine what gear to be in. It WILL adapt to your particular driving style but it takes a while. Maybe as long as 3-4 months depending on how much you drive it. I noticed that "hesitation" (trans shift to first) for quite a while in my X3. These days it never seems to happen. My trans has adapted So guys and gals, give it some time. It will smooth out the more you drive your fantastic X3s as you and the X become ONE
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Replying to: x3driver (Mar 06, 2007 6:13 pm) Now I'm ready to take delivery of my X3 without any "hesitation"  ) This board is terrific ! I hope to return the favor after I have been an owner for awhile.
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Replying to: cincyart (Mar 06, 2007 7:03 pm) It is living up to the BMW standard of driving for me in every way .... except for the adaptive trany issue. Not only do I have the hesitation from standing stop, I am also experiencing it while ascending just about any grade of 25 degrees or more ! I can only describe it as though the car were out of tune or running out of gas. I am noticing this more often as the days go by. This has to be something other than the adaptive transmission issue, can anyone relate to this ? I plan I taking it to the dealership tomorrow.
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Replying to: cincyart (Mar 11, 2007 4:51 pm) I would be prepared to explain to the dealer if it does that in SD" mode, and/or if it depends on how deep into the gas you are. It sounds worse than ours, ours is only under really light throttle, and only barely noticable......
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Replying to: x3driver (Mar 11, 2007 5:52 pm) In regular D mode it is very deliberate and refined so to speak, in SD mode it becomes a real tiger, almost like driving a BMW 3 series coupe. So far, my average mpg is about the same as using D, around 19.5 mpg in suburban driving.
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Replying to: cincyart (Mar 23, 2007 1:17 pm)
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Replying to: trr1 (Apr 09, 2007 12:11 pm) |
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