This is a rear spring replacement on a 2012 Volvo XC60. Support lower control arm with jack. Remove control arm to knuckle bolt. Lower jack, you may need to hammer arm down. Remove spring. Attach spring isolator to new spring and reinstall. Make sure to note the notches on the top and bottom spring perches. Jack up control arm, squeezing the spring and arm into the knuckle. Install bolt.
