WNJX-TV (channel 4) is a Spanish-language independent television station in Mayagüez, Puerto Rico.

It is a full-time satellite of San Juan–based WAPA-TV (channel 4), owned by WAPA Media Group.

WNJX-TV's transmitter is located at Monte del Estado in Maricao, while its parent station maintains studios on Avenida Luis Vigoreaux in Guaynabo.

Branded on-air as Telemundo West, this subchannel is mapped to virtual channel 2.12 rather than 4.4.

The station's digital signal is multiplexed: WNJX-TV shut down its analog signal over UHF channel 22, on June 12, 2009,[citation needed] the official date on which full-power television stations in the United States transitioned from analog to digital broadcasts under federal mandate.