Hiya, I had problems with a non-Volvo rubber shock lower mount tearing after only 20k miles, I've now replaced with genuine Volvo. I don't think tracking or alignment need doing necessarily (unless you change track rod ends), but the camber will likely be out a bit. From what I was told at MRG Chippenham however, there isn't actually that much adjustment so perhaps checking tyre wear isn't obviously on one shoulder (inner or outer) will be enough. If you're worried, make sure the garage who does it fits the sleeves in the steering knuckle bolt holes, that way the bolts should be fairly centred and the camber can't be out by much I guess. Cheers, Pete