Rear control arm bushing
#1
#2
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I believe you can buy the bushes separately, but you have to be mega-careful pressing in and out, because the rear lower arms are aluminium castings, and you could crack the housing. If you're going to DIY it, make sure you pour a couple of kettles of boiling water onto the assembly before pressing to expand the aluminium. The price of these arms came down in price very substantially over the life of the X350s, thus making it more or less as cheap to swap arms than replace the bushes if getting a shop to do the job. A shop I knew started swapping bushes but gave up when one cracked. As a business, they just couldn't take the risk of customer litigation.
On the other hand, the two lower arms that make up the front lower wishbone are aluminium forgings and replacement of the large trunnion bushes is a fairly routine operation. The ones that tend to fail are those on the "banana" (or front) arm. The lower air spring bush is also easily replaceable, although it can be troublesome getting the shock bolt loosened off and removed.
On the other hand, the two lower arms that make up the front lower wishbone are aluminium forgings and replacement of the large trunnion bushes is a fairly routine operation. The ones that tend to fail are those on the "banana" (or front) arm. The lower air spring bush is also easily replaceable, although it can be troublesome getting the shock bolt loosened off and removed.
#4
#6
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The front lowers are all different sizes.
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