I took my xc to the dealer to find the problem with the bobblng noise in the front suspension. They scratched their heads and said it must be the strut. $700 later, I still have the same problem. I suggested the control arm bushings and they said the car would sway move back and forth when stopping. I had a similar problem a few years back and it turned out to be the bushings on the front sway bar were worn out.
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2003 Volvo XC70 Question: did the new control arm bushings fix the problem?
Answer #1Bret Bodas from RepairPal Test Shop, December 10, 2012, 17:24Master
These models have problems with the lower control arm bushings, so that could be it, but it could be the upper strut mounts (which they should have checked when they replaced the struts), or the ball joints, or the sway bar link rods.
It's odd that a Volvo Dealer couldn't figure this out, and that they replaced a good part. I would request the shop foreman go for a ride with you and demonstrate the noise for them.