I have replaced the thrust arms a total of 4 times over the past year.
The first time was from oem so that was fine. The 2nd time was because i havent quite broken them in and spun out in the rain so that shot the rubber and they bled out. 3rd time i had the thrust arms on for 5 months and i thin this was purely the result of tight city driving ( mainly those parking lots) Now the car is sitting on a fresh set of thrust arms bushings and all every other front suspension component looks okay.
Here is the issue ( if you can call it that) The car makes a little clicking noise when in parking lots if i turn the wheel into the locking position (either way) now incase you are wonder what that clicking noise is it is the thrust arm bushing the bushing is rubber filled with "lube" but outside the rubber there is a plastic gasket. Now could someone please explain to me why this plastic gasket always breaks. i have installed the arms 1 time without the plastic gasket no clicking noise. But my shop says that the gasket is their because its an m5 and it makes things tighter. . . Id begg the differ so to speak.
anyway if anyone has more insight into these things please let me know.
My next set will be a new thrust arms on dinan bushing as my shop could not fit a polyurethane bushing. (idiots?)
here is the link to the part- BMW Control Arm - Front Driver Side Upper - eEuro Preferred 31126774825A - Free Shipping Available
here is close up pick of the said gasket
that small black lining actually pops out its not glued to the rubber and its a hard plastic with a metal ring. i have 2 old thrust arms i can get better picks of this said gasket.
at the dealership the people really dont know what it is they just stick it in. on average i notice once you replace the thrust arms and bushing the car rides okay for 12k miles and then they are shot again. my BMW adviser says this is due to the car being an M car and once you touch the suspension its hard to make it the same ( i agree although dinan or polyurethane should be a better alternative. )