for wira, satria, putra, lower arm are mounted on suspension crossmember (some workshop call it subframe, some call axle, some call butterfly because it look a bit like butterfly) Suspension crossmember, mount on chassis frame. if your lower arm is bent, there's a possibility ur susp crossmember, and stabilizer bar link rod (some w/shop call it satay) bend too because all of this parts is mount together. all of this parts is change-able. some people comfuse between suspension crossmember with engine lower support member. clear?