Spring Seat
The front strut/spring assembly seats on this rubberized seat. They crack and you will hear it going over bumps. Part is $25-$30, Labor 1 hour.
When my Volvo independent shop replaced one, they were able to maintain the alignment during reassembly. I posted a question on how to do this if you are interested.
http://volvospeed.com/vs_forum/index.php?showtopic=40453&hl=howardc64
Brake Booster Seal
You hear a hissing sound in the driver footwell area. This is the sound of a vacuum leak. Some people succeeded on repairs. See the following thread. Part is $500, labor 2-3 hours.
http://volvospeed.com/vs_forum/index.php?act=ST&f=34&t=24340
http://www.volvoxc.com/resources/how-to/pdf/power-brake-booster-replacing.pdf
ECC (Electronic Climate Control) temperature fan
There are a couple of interior cabin temperature sensors in this car. One of them is behind the 3 slits on your ECC and sense temperature by sucking in the cabin air over a heated wire. Dusts + threads gets in and causes the fan spindle inside to jam. This problems shows up when your ECC can't provide heat except at MAX.
A easy way to determine if this is your problem is to listen for the faint noise behind the ECC after the engine is turned off. This noise is coming from the fan running briefly after the car is turned off. DIY for getting the ECC panel off can be found here
http://www.volvoxc.com/resources/how-to/pdf/xc_center_console_removal.pdf
*IMPORTANT* Read this to avoid damage to your ECC.
Here is a couple of discussion thread on this
http://www.volvoxc.com/forums/showthread.php?p=83588&mode=threaded#post83588
http://www.brickboard.com/AWD/volvo/1036243/V70/2001_v70_t5_heater_problems.html
After ECC removal, just get a cotton swabs + some alcohol to clean the dirty fan spindle. Dealer labor maybe 1 hour.
