A power cinching striker assembly (10) attaches to structure adjacent an acess opening for engaging a closure latch (26) attached to the closure for the access opening. The power cinching striker assembly (10) is equipped with a spring (38) biased bumper (36) that applies spring force to the closure in the opening direction so as to assist in the opening of the closure along with the counter-pressure of a sealing rubber between the closure and the structure adjacent the access opening. The assistance of the spring (38) biased bumper (36) is enhanced in the closure opening direction. However, the spring (38) biased bumper (36) is retracted at the end of the opening operation or the beginning of the closure operation when the striker (18) is extended for latching engagement. This retraction reduces the counter-pressure of the spring (38) biased bumper (36) during the latching phase of the subsequent closing operation at least reducing, and preferably eliminating any tendency of the spring (38) biased bumper (36) to burden the subsequent closing operation in achieving a secure latching of the closure in the closed position.
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