Oil consumption on the 2.4L engine
First-generation tCs share the Camry 2.4L engine's documented oil consumption issue, in which worn piston rings let the engine burn oil between changes, an issue Toyota addressed with service campaigns. Once consumption is established, the fix is internal engine work, and owners often sell instead.
Hatch and sunroof rattles and leaks
The tC's glass sunroof and rear hatch are known for rattles and worn hatch struts, and sunroof mechanisms can jam or leak as seals age. None of it affects how the car drives, but the noise on each drive is what convinces owners to sell.
Wheel bearings and suspension wear
Front wheel bearings, struts, and sway bar links wear steadily on tCs, especially cars that spent their lives on larger aftermarket wheels. A humming bearing plus tired struts quotes as a front-end refresh, and owners of a budget coupe often sell rather than spend it.
Clutch wear and manual gearbox faults
Manual tCs driven hard wear clutches early, and release bearings can chirp and fail, requiring transmission removal to replace. Automatic cars are simpler but can shift harshly when fluid was never changed, and either transmission job can exceed what owners want to invest.
Every one of these is a condition answer on the form — report it and it is priced in from the start, never discovered at pickup.