[tb30570]

I've been getting a vibration out of the front end. I wasn't sure if it was a wheel bearing or a tire with a broken belt. When I've had bad wheel bearings before, they stopped making noise when turning one way and continued to make noise when turning the opposite direction.....so I assumed it was a tire.

This morning, I got a cc-id-370 code and the AWD and ABS turned off.

I did a little reading and there are 3 common issues that cause this.

1) Wheel Bearing/ABS Sensor issue
2) Transfer Case Actuator/Transfer Case Actuator Gear issue
3) Charging/Battery issue

I'm leaning towards a Wheel Bearing/ABS Sensor issue except the front wheels don't seem to have any play at all. ( wheel bearing part number: 31226783913; lock ring 07119934760 & nut 33411133785 )
DIY:
http://www.e90post.com/forums/showthread.php?t=870124

I doubt it's a Charging/Battery issue because I tested the battery and its at 12.4 volts with the car off.

I have no idea what to look for if its a Transfer Case Actuator/Transfer Case Actuator Gear issue. I also don't know what the part number of the gear is. The whole motor assembly is 27107546671 .

What do you suggest I do first?

Sources-------------------------

Wheel Bearing/ABS Sensor issue:
http://forum.roadfly.com/threads/126...-lights-all-on...
http://www.e90post.com/forums/showthread.php?t=290544

Transfer Case Actuator/Transfer Case Actuator Gear issue
http://www.xoutpost.com/bmw-sav-foru...r-motor-3.html
http://www.xoutpost.com/bmw-sav-foru...al-solved.html

Charging/Battery issue
http://www.bimmerfest.com/forums/sho....php?p=4208966
http://5series.net/forums/e60-discus...ion-quo-79434/

[tb30570]

I thought it was a wheel bearing / speed sensor issue because I was getting a vibration from the front. Turns out, my tires are just noisy. I rotated them to the back and it was a lot quieter.

I was getting a clicking or grinding sound when the car shut off and I found a couple posts stating that is usually a transfer case issue. I just purchased the actuator motor for $413.48 after shipping. I'll get that installed and go from there.

http://www.e90post.com/forums/showth...0#post16690230

[tb30570]

I'm ordering some transfer case fluid too. Can I fill the fluid through the actuator motor hole or do I need to top it off using the fill hole? It sounds like access to the fill hole stinks.

http://www.thebmwpartstore.com
83220397244 - $38.76

Here is a DIY for TC fluid change:
http://www.pelicanparts.com/BMW/tech...Replacing.htm#

[tb30570]

I replaced the motor a couple of weeks ago. It was pretty easy. Topping off the fluid was no big deal either. I got a 14mm hex off ebay when I ordered the motor and fluid. No problems since!

[tb30570]

I put the wheel bearing, axle nut and snap ring on ebay if anybody is in the market for those parts