My'05 xB makes a small chirping sound when I blip the throttle. This is the only time I hear it. I don't think it is a belt. Is this normal?

 

how many miles, and are you the 1st owner? Sounds like the drive belt needs to be replaced. They go in about 30 - 40K miles. Does it make the same sound while your AC is on?

 

2nd owner, 93,000 miles. A/C use doesn't affect it. It doesn't seem to be a belt and only does it for a fraction of a second. Both belts look really good, but it could be one of them. I think the belts have been replaced, but don't know at what mileage. I tried belt dressing and no change. I wonder if it could be a pully or alternator or compressor bearing, but it only does it when the throttle is initially blipped. I assume it will eventually get worse if it's anything serious.