Front suspension knock
During the MOT on this 2001 BMW 325i, we weren’t too surprised to find the offside front lower balljoint had excessive wear. The knocking noise it was making was enough to indicate attention was needed.
The lower arm has two balljoints and a rear mount. Although the rear mount can be removed from the arm, this is not always easy and it is much quicker and simpler to just replace the complete arm with the mount. One of the tricky parts of the job is undoing the top nut on the inner balljoint as they’re not all accessible with a socket and if they begin to spin before the nut has been removed it adds to the complication. This one played by the rules, although a spanner was needed to undo the inner nut, accessing it through the underside.
The rear mount unbolts easily and, with both balljoints undone and split, the old arm was off. Once the new arm was fitted, the Beemer passed its MOT.
The new arm was fitted complete with rear mount. The inner nut is not accessible with a socket, so a spanner is used through the underside.