Manufacturer exact-model evidence confirms Shark RV990 compatibility with Shark® Robot Pre-Motor Filter (SKU RVFFK950) (US market). Compatibility with Shark ION Robot Side Brushes (SKU 1171FK870) is not confirmed; see its evidence below.
Compatibility varies by part. Being in the same series does not mean every part is shared — check each part below individually.
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SharkNinja's official 1171FK870 page provides an exact compatible-model list, and this model is not included. Absence from that list is not incompatibility evidence, so compatibility remains unknown.
SharkNinja's official 1172FK870 page provides an exact compatible-model list, and this model is not included. Absence from that list is not incompatibility evidence, so compatibility remains unknown.
