5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I've got a '92 E34 and I'm going to have to replace the lower control arms (among other things). The car's got aluminum arms on it now, but my parts supplier offers both aluminum and steel, with the steel obviously being cheaper. No one can seem to tell me if it's imperative that I use the aluminum. They all say, "We put on what we take off," which is sensible in an obvious sort of way.
Stock is steel.... upgrade is aluminum due to its light weight ... and strength.... Either way is fine... if your not pushing your car often.. or your not sliding around turns.. then you'll be just fine with steel ones.
yeah i need the lower control arms also. if they 're the exact same shape and size then i'm going with the steel. I'm not racing the car so i'm going with steel. i can't see it causing a problem except for a slower responce due to the higher unsprung weight.
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