The previous parts were discontinued and the correct procedure on an older car is to insert a washer to make up for the 5mm gap in bushing length
it’s the same exact arm just like a 1mm difference at the knuckle. just put 2 washers on the bolt for a super tight fit
the bushing is a glorified ball joint, it pivots by design instad of stretching. 1mm washer on both sides to snug it upSo is it a 5mm gap... or a 1mm gap???
Either way... the bushing is supposed to be "clamped" by the bolt in the knuckle in a way that the bushing won't pivot in the knuckle.
When a washer is introduced on either side of the bushing, (trying to fill a gap)... that creates a separate potential pivot point... which could cause wear on the arm or washers, (or knuckle) ...eventually causing slop.
Too hard of a washer... and it will rub/wear the knuckle... or the aluminum on the sides of the bushing.
Too soft of a washer... and the washer will wear... and you end up with play/slop.
Doesn't matter what number you use, they both link to each other, at least on fpg, backordered till July 8th they are saying.Well the 3W4Z-5A649-AA part numbers ARE obsolete... so yeah... not available.
According to my dealer... the part numbers they gave me... that I listed above... ARE available... so FPG should be able to get them... at a cost of around $500 for both arms, ($245+215).
even jag dealer techs are using washers. they work fine. if it doesn’t the part has a lifetime warranty,
you can literally send them a control arm sliced in half and they’ll refund you. FCP euro’s warranty is so abusable it’s not even funny, these guys even take used oil.Then I guess it's ok.
What if wear is caused on the knuckle... if the washer pivots with the bushing in the arm? Is that under warranty?