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  #1  
Old 05-20-2016, 08:52 PM
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Hesitation

Sorry, originally posted on wrong forum.2007 X3. Hesitating when accelerating. Then kicks in goes like hell! Could it be new spark plugs needed ?
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  #2  
Old 05-23-2016, 02:49 PM
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How many miles, transmission been serviced?


I'd start with a change of differential, transfer case and AT fluids

Also, check the below link;
2006 X3 Shudders under acceleration at 3k rpm - Bimmerfest - BMW Forums
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Old 05-23-2016, 04:24 PM
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120000 miles. I don't know if it's been serviced I just purchased it.
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Old 07-24-2016, 11:44 PM
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I also have a 2007 - with 75,000 miles..

I was noticing some hesitation as well and read somewhere that the vanos solenoids get gummed up - sometimes they can be cleaned and the low rev power comes back for a bit.... but since our cars aren't young anymore - do what i did and just replace them. they are super easy to replace. right on the front of the engine - two bolts and they pull right out. took me 15 minutes to do them both. oem replacements are around $200 i believe.

do a look up for the install process - i know someone did a write-up.
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Old 07-24-2016, 11:47 PM
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oh - i also bought new coil packs and spark plugs too.. after doing these three things it made a night and day diff for my car.. idle is super smooth, lots of power and no more hesitation off the line.
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Old 07-25-2016, 06:08 PM
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THANKS!!!
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