2006 X5 4.4i Vibration issues after tons of CPO warranty work

[dmkaplan]

Hi Guys! Newbie here to the BMW world in general and definitely to the X5. We have had an MDX in the past and I replaced my AWD Volvo S60 with the SAV.

We purchased a:

2006 CPO X5 4.4i Executive Package, Sports Package (ZCY), DSP Radio, Titanium Silver on Dakota Leather, 19" Rims.

Anyway, I would like your input. I purchased the vehicle CPO in October 2010. About 10 days after I had it, the check engine light came on. Took it to the dealer. They run the codes - DME 29CF, 29D2, 29D3, 29CC. They then reset the system, tell me that it misfired due to "unfavourable ambient conditions" and sent me on my way.

1 week later, Check engine light comes on; take it back to the dealer. Run the codes: DME 29CE, 29CF, 29D0, 29D2, 29D3, 29D4, 29CC.
All cyl missfire.


Following warranty work performed: Vent value cover 1-4 replaced, new value cover and pipes


3 days after they drop off the vehicle to my office: Check engine light again. Now vehicle running rough and cylinder 1 & 2 misfiring.

Following work performed:

CCV replaced on bank 2;
Ignition Coil 1 and 2 replaced
New Spark plugs

Three days later... Check engine light again. vehicle running rough and the vehicle hesitates and lurches while in 1st gear (i.e. while driving in a parking lot). It also intermittently shifts very hard into third. This issue occurs with mild throttle.

Plus there were additional small issues that were annoying me:

1. The vehicle vibrates when idling in gear. This was intermittent but does >50% of the time.


2. Adaptive headlight not working

3. The steering wheel squeaks when turned left or right. This is a high pitches squeak/rubbing sound.
4. The hydraulic trunk lift is not working properly.

5. There were some paint issues that were not addressed during the CPO.

So after I send a letter to the dealership owner and to BMW Canada CEO; they take back the truck for 4 weeks give me a 2011 X5 loaner and perform the following service:

- L Front Headlight and Adaptive Headlamp Module replaced
- Service Bulletin for rubbing sound from steering column
- Replaced both gas shocks of tailgate
- fix the fact that Bank 1 CAN sensor disconnected
- replaced transmission gasket set, rings and rings

- replace Intermediate levers and rocker arms replaced
- Alternator solenoid valve replaced and seized alternator mountings
- Repainted lower tailgate and both rear quarter panels and repaired (lower tailgate)


Now, the truck runs fine except for the following remaining issue: The vehicle vibrates when idling in gear. This is intermittent but does >50% of the time, especially when it is cold. I also notice that the blower fan RPM for the heater/AC drops when the car is decelerating and downshifts from 3rd to 2nd.

Is this normal for an 2006 X5 4.4i or do I send it back to the dealer?

This is a great vehicle but I can't believe that they sent the vehicle CPO out the door in the manner they did. In my mind, this vehicle has NOT "passed the same rigorous inspections and quality controls that new BMWs go through," and is not "fully equipped with peace of mind." (To quote the BMW Canada CPO website)

FYI - the CPO manager and the sales guy have since left the dealership.

Sorry for the long post but any help here would be most appreciated. Clearly, this the X5 is a much more complex vehicle than the Mazda Miata that I fix myself!