I recently replaced these bulbs on my '01 V70 and it was easy task. First, remove the pin holder located below the environmental module by prying on both sides. Once pin holder is removed, you will have to remove the 2 bolts at the bottom of the environmental module. The module snaps in and out so pull straight out while prying on both sides. (take care not to damage adjoining surfaces) Once it comes out, you will need to temporarily disconnect the wires to the cigarette lighter so you can have more room to access the back side of module. The bulb holders are either white or grey and recessed directly behind the temperature controls. Use a small flat screwdiver to turn the defective bulb about 1/4 turn CCW. You may need to use your wife's tweezers to pull the bulb out and to guide the replacement back in. My bulb's Volvo part number was 30739356 @ $10.48 each. I believe the white and grey base bulb holders may be slightly different in light color, so you may want to remove yours and take to the dealer for correctness sake. While I was in there, I found the temperature sensor vent and motor was filled with lots of dust/dirt, so I vacuumed these out. Take care and don't damage the sensor (looks like a horizontal wire behond the vent) I'm sure it is quite fragile. Hey, you're finished already. Don't forget to reconnect the cigarette lighter wires. Just reverse all steps to put all back in the dash.
I hope this helps. Good luck.
Wayne
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