Geosynthetic reinforced soil retaining walls (GRSRW) are widely used for various purposes due to their high performance and easiness in construction compared to conventional retaining walls. However, researchers have identified rainfall and earthquake forces as the two primary factors contributing to the failure of GRSRW. During rainfall, backfill soil becomes saturated with water, resulting in the generation of excess pore water pressure, which decreases the shear strength capacity of soil and leads to the failure of the structure. In the present study, to mitigate this problem and address sustainability concerns, CO2-cured pervious concrete modular blocks were developed and used as a facing element in GRSRW. For experimental studies, a scale-down GRSRW was constructed with both pervious concrete and conventional concrete modular block facings. For experimental tests, a poorly graded fine sand with 70% relative density and 75% saturation conditions was selected as a backfill material. For seismic loading, a sinusoidal acceleration with a peak ground acceleration of 0.2 g and a frequency of 2 Hz was selected and applied for a duration of 20 s. Parameters such as acceleration response, pore water pressure response, horizontal displacement, and dynamic earth pressure were measured and compared to evaluate the performance of the facing element in reinforced earth retaining walls. Based on the obtained test results, the influence of soil saturation and facing element in reinforced earth wall structures was identified and discussed.