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.
WNJX-TV's fourth digital subchannel operates as a full-time satellite of Telemundo owned-and-operated station WKAQ-TV (channel 2) under a time brokerage agreement with NBCUniversal's Telemundo Station Group. Branded on-air as Telemundo West, this subchannel is mapped to virtual channel 2.12 rather than 4.4. WNJX-DT4's parent station maintains studios on Roosevelt Avenue in San Juan.