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The Muon g − 2 collaboration at Fermilab has announced their final result of the anomalous magnetic moment of the muon. By adopting the lattice-QCD evaluation of the leading-order hadronic-vacuum-polarization, this result is now in agreement with the latest theoretical prediction to the 1 σ level. This new result further constrains the allowed parameter space, but does not rule out all possible new physics contributions the muon g − 2 . We study the implications for one of the relevant models, the gauged U ( 1 ) L μ − L τ . When using this model to resolve the previous 4 σ tension, results from muon neutrino trident (MNT) scattering experiments would restrict the mass of the new gauge boson ( Z ′ ) to be less than 300 MeV. Since the theory and experimental data difference for muon g − 2 is lowered down to 1 σ , the requirement for m Z ′ ≲ 300 M e V is much relaxed. Within the updated allowed range of Z ′ boson mass, we study the models implications for electron and tauon g − 2 as well as future muon colliders. We find that muon collider can effectively probe the U ( 1 ) L μ − L τ .