Description

The Monroe rear shock absorbers for the Lexus ES350 are specifically engineered for the replacement market, addressing the wear that naturally occurs in suspension and other components after thousands of kilometers of use.

Regarding the Monroe OESpectrum front struts (part numbers 72309 and 72310) for the 2007-2009 Lexus ES350:

These struts essentially function as oil pumps. A piston, affixed to the end of the piston rod, operates within a pressure tube filled with hydraulic fluid. As the suspension moves, the piston forces hydraulic fluid through small holes (orifices) within its structure. This restricts fluid flow, thereby slowing the piston’s movement and consequently dampening spring and suspension motions.

The resistance provided by shock absorbers depends on the speed of suspension movement and the size and number of orifices in the piston. Modern shock absorbers are velocity-sensitive hydraulic damping devices, meaning they adjust resistance based on suspension speed. This capability allows shock absorbers to adapt to varying road conditions, reducing:

– Bounce
– Roll or sway
– Brake dive and acceleration squat

Shock absorbers operate on the principle of fluid displacement during both compression and extension cycles. Typically, they provide more resistance during the extension cycle, which controls the movement of a vehicle’s heavier sprung weight, compared to the compression cycle that handles the lighter unsprung weight.