Dealer techs should already know about these issues. You can see the traces of oil/dirt on the bushing long after the fluid is gone. Easy to spot, and definitely a maintenance item on any car with more than 50k miles. It's something we check on every car that ever gets put on a lift here.
E92 335i/6MT Dinan Stage 3: intercooler, oil cooler, intake, flash, exhaust, LW dual-mass flywheel.
Vishnu PWM methanol custom trunk mount, Diffsonline 3-clutch Salisbury custom diff, Ohlins Road and Track coilovers, Vorshlag camber plates, much more...
E28 M5 w/ buncha stuff, R171 SLK350