Abstract: A tire pressure monitoring system (TPMS) sensor grommet tool has a U-shaped portion adapted to be inserted between a grommet disposed on the stem of a TPMS sensor and a seat at the base of the stem in which the grommet resides to separate the grommet from the seat for removal of the grommet from the TPMS sensor. The tool might also include an installation opening adapted to be disposed about the stem to guide and/or push a new grommet down the stem and into the seat. The leading edge of the tool, and/or and the U-shaped portion, may be beveled, to facilitate insertion of the U-shaped portion between the grommet and the seat. A flat side or ledge of the U-shaped portion may be adapted to separate the grommet from the seat, such as by levering against the seat to lift the grommet from the seat for removal.