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Wise Auto Tools: Along with other makes, I've worked on BMW's at Carmax, when I worked first as a reconditioning tech and then later as a retail tech. To beat the book time, I used an air chisel sometimes to help remove old control arm and trailing arm bushings without removing the arms completely from the car. You have to be really careful not to damage the new bushings when installing them. There's also a risk of marring the surface that the bushings press into, especially when using a crude m …