I took my 2002 Corolla into the dealer for diagnosis of an engine rattle under acceleration when the engine is warmed up, especially when the A/C is on (during the summer). Service manager says all 4 (?) motor mounts need to be replaced. Does this sound reasonable, after 23K miles? The repair would be under warranty, but it seems quite major surgery just to fix a little rattle. I'm also a bit suspicious because the service mgr also said the car needs throttle body cleaning, rear brake adjustment, wheel alignment, and ATF flush ("fluid is dirty" - but looks clean and pink/red to me..).
How does one diagnose a bad motor mount? Has anyone had problems with the motor mounts on Corollas 98-02?
Thanks much.