Why does one 2005 x5 4.4 sport drive different then another.

[blaubenz]

I posted something similar a few months ago. I thought it could be the driver adaptive feature. I tried the controversial reset procedures describes here and other website but that did not resolve the issue.

I am very lucky. I happen to have two 2005 4.4 sport. So as fare as I can tell they are mechanically identical, They even have identical wheels and almost the same tires (ties are the same size and brand).

I got these used. I got about 7K miles on one and about 3k on another. I notice on one of them it drives and shift a lot sporty, it is more responsive, shifts more crisps, gas pedal more sensitive. For example on one of them in a dead stop I press the pedal look down and the mpg gauge automatically goes to 8mpg but the other I have to make a little effort to press the pedal more to get it to 8mpg (at it does not quite get there and stay there), but drives smoother. It also seem like one of them them have more power ("pull"). They way I describe it is that one is more powerful, when I step on the gas the rpm goes right to 2000rpm and gas goes right to 8mpg and stay there until it gets scary. The other other when push would go pass 2000rpm but the gas would not quite reach 8mpg and down shift (and it does seem to have the pull).

Now I don't want to think there is something wrong with one of the X5. They both have low mileage (28K and 52K). And I don't have any indication that anything is wrong except for what I have describe here. Truth be told unless you dive it side by side you would would not think there are any difference.


Any suggestion here to try to figure out what is going on.

BTW I don't have an aggressive driving style at all. I am use to driving big SUV and you folks probably would describe me as driving the bimmer like a big SUV truck.

[electricalserv x5]

Dude there is so much on these n62 engines and parts You would need a lot of patients and a few bottles of brew to get through
this ...................Trust me been there Done that ,If the padels was replaced it is the new style so it has the new chip in it. IVM or ISM, vanios solenoides ,oil leaks...........You name it , I went through all of it, total PITA.

[Qsilver7]

Originally Posted by blaubenz

... I thought it could be the driver adaptive feature. I tried the controversial reset procedures describes here and other website but that did not resolve the issue. ...

This reset procedure you refer to...is one of the most misunderstood and incorrect (WRONG) hoaxes that continues to be spread to BMW owners. I've even seen it given to new generation BMWs, too.

First, driver influenced adaptations can't be reset because they are never SAVED by the TCM (tranny control module)...or what ever the new control module is in the new generation BMWs.

If driver influenced adaptations weren't new at every start up...that wouldn't really be a good driver influenced adaptation that would not be able to adapt to the current driver.

See text highlighted in yellow below...it reveals that the AGS driver influenced adaptations are NOT STORED...but start fresh at every start up:

Driver influenced adaptations receives data from the accelerator pedal...slow or fast...gentle presses or floored (pedal to the metal)...will cause the transmission to select 1 of 3 shift maps (XE=extreme economy/E=economy/S=sport). Not saving the driver influence allows for an aggressive driver getting a different shift map within seconds after assuming the command after a "granny-toed", light footed driver.

The only thing the "reset" is doing (when it instructs you to turn the ignition on, then press the accelerator pedal to the floor for 30 seconds, then start the car)...is instructing the TCM to select the SPORT shift map.

Sadly, if all the people that report this hoax...actuallly understood how BMW designed the AGS driver influenced adaptation feature...this false rumor would end...but sadly it persists...along with the ignorance of how the system actually functions.

The info below explains AGS (driver influenced adaptation) BMW introduced back during the e34 production and continued to build upon since that time. Driver influenced adaptation is different than the wear & tear "pressure control" adaptations that CAN be reset using software. Not only are the 3 driver influenced adaptations explained below (Extreme Economy/Eonomy/Sport)...but also the other environmental or road condition adaptations that can occur automatically if the gear selector is in "D":

• Stop n go
• Winter
• Uphill
• Downhill
• Cruise Control
• Curve

...as well as the manually selectable extremes sport mode and manual sport mode.

{take note of text in red box below}



{take note of text in red box above}

[blaubenz]

To Qsilver and all. If it is the driver adaptive tranny I don't think it is that so I move on to try to find the cause. Any ideas folks??

1. How do I check if it has a different chip?
2. Is there a way I can scan it to see what version software I have???

[BimmerBRun]

Originally Posted by blaubenz

I posted something similar a few months ago. I thought it could be the driver adaptive feature. I tried the controversial reset procedures describes here and other website but that did not resolve the issue.

I am very lucky. I happen to have two 2005 4.4 sport. So as fare as I can tell they are mechanically identical, They even have identical wheels and almost the same tires (ties are the same size and brand).

I got these used. I got about 7K miles on one and about 3k on another. I notice on one of them it drives and shift a lot sporty, it is more responsive, shifts more crisps, gas pedal more sensitive. For example on one of them in a dead stop I press the pedal look down and the mpg gauge automatically goes to 8mpg but the other I have to make a little effort to press the pedal more to get it to 8mpg (at it does not quite get there and stay there), but drives smoother. It also seem like one of them them have more power ("pull"). They way I describe it is that one is more powerful, when I step on the gas the rpm goes right to 2000rpm and gas goes right to 8mpg and stay there until it gets scary. The other other when push would go pass 2000rpm but the gas would not quite reach 8mpg and down shift (and it does seem to have the pull).

Now I don't want to think there is something wrong with one of the X5. They both have low mileage (28K and 52K). And I don't have any indication that anything is wrong except for what I have describe here. Truth be told unless you dive it side by side you would would not think there are any difference.


Any suggestion here to try to figure out what is going on.

BTW I don't have an aggressive driving style at all. I am use to driving big SUV and you folks probably would describe me as driving the bimmer like a big SUV truck.

I'm sure you'll get a more accurate and informative answer but in the meantime, couldn't a more recent transmission fluid/filter replacement make a difference?