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Old 12-13-2007, 10:01 PM
HolE39 HolE39 is offline
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Location: San Jose, Ca
Join Date: Dec 2005
Posts: 65
Mein Auto: 99 528i, 97 M3, 07 X5
Originally Posted by chirpate View Post
So yesterday i woke up very early. Took my BMW 2007 X5 to dealer since it hesitates on the acceleration. Got the X5 3 months ago, all was good until last month noticed a little delay when pushing the acceleration pedal. Also now my X5 is not quick, going up hills is very slow, picking up a highway is difficult.

My pedal just feel heavy. I mean if i really slam the acceleration it moves, but theres a 2 second delay. When im at the traffic lights, im the last one to get going, even cheaper cars pick speed quicker then i do.

First the dealer wouldnt belive me there was a problem. He just said thats how x5s behave. I just want my X5 to behanve the way it did on the first day i brought it. So i got one of the engineers to ride with me. He said he will do the tests and everything.

Left the car with the dealer all day.

Got a call from the dealer telling me the car was ready.

Picked it up in the evening.....

And they did NOTHING! !!!!!!! Just told me they did all the tests and could not find anything wrong with it. Thats bull****. Told me had all the last software.

He said i can speak to a BMW engineer that is going to come to the dealer and explain my problem.

Heres what the problem is.

1. Same as everybody elses
2. Off the hesitates
3. The car is not qucik then before
4. Going up the hill is sluggish
5. When i push the pedal, the response is slow, and the speed increases slowly
6. To overtake a car in the faster lane would be tough.
7. Im having to work with the car harder to move it
8. At feels like its taking forever to getup to 90

Dealer told me car adapts to your driving habbits...thats bull****.....No car adapts unless it has aritificial intelligence built it.

I mean if my cousin was to drive the car....he would just think of the hestiation in acceleration as the x5 being just slow..... but i know how my car felt 2 months ago....acelleration was GREAT!!!!, moved and felt just like a car....

and NOW...... the it just feels heavy on the pedal. They did reset the modules. I guess it made a little improvement. But NO WAY NEAR the kind of car i had when i first purchased it.

I will keep everybody updated on my next meeting with the BMW engineer.

I suspect its the same problem seen on the x3.

Im sure nothing is going to be done about it unless there is a large group of consumers complaing.

Im many others have this it just for only 2007 x5. only on 3.0si X5 (which i have) or also on the 4.8si.
Back to the original post.

To me, this thread is too subjective. The measure and of delay, acceleration, sluggish, and heavy pedal vary from person to person and make for a frustrating thread.

The best information available is the experience and history that YOU have with your X5. If you think performance has declined, continue working with your dealer. In my opinion, you should stay away from fuel additives.

I asked about how the X5 performs in either Sport or Normal mode. There is a difference in the shift programming. In normal mode, the transmission will shift at lower RPM than when in Sport mode. The shift speed is also faster in sport mode. Moving a 5k lb. vehicle with 260 HP isn't easy. Moving this amount of weight "quickly" is going to take RPMs. FWIW, I toggle between Sport and Normal mode all the time. I wouldn't characterize the acceleration as delayed or sluggish. It's a heavy vehicle.

One last test I can think of: Run your tank close to empty and fill up with 100 Octane (we call it racing fuel in Ca.) to see if the car picks up speed. This would eliminate engine knock and sensor picking it up. If the sensor detects knock, it retards timing to save your engine.

Good Luck.
Phil 4:13

2000 Dodge 4X4 - Sanger Puller
97 M3
99 528i
2007 3.0 X5
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