| Above: | Simulcast with XHGBO-FM 92.1 |
| XEFZ-AM | |
| City: | San Nicolás de los Garza-Monterrey, Nuevo León |
| Branding: | ABC Deportes |
| Format: | Sports talk |
| Frequency: | 660 kHz |
| Airdate: | March 29, 1971 (concession) |
| Power: | 10,000 watts day 1,000 watts night |
| Class: | B |
| Owner: | Grupo Radio Alegría |
| Licensee: | Radio Auditorio, S.A. de C.V. |
| Sister Stations: | XHRK-FM, XHMG-FM, XHGBO-FM, XHXL-FM, XEBJB-AM, XEMR-AM, XEVB-AM, XENV-AM |
| Coordinates: | 25.7542°N -100.3141°W |
XEFZ-AM is a radio station on 660 AM in Monterrey, Nuevo León. It is owned by Grupo Radio Alegría and carries a sports talk format known as ABC Deportes.
XEFZ received its concession on March 29, 1971. It operated on 1110 kHz as a 250-watt daytimer. Not long after, XEFZ moved to 660 and ramped up its power to 10,000 watts.
On January 4, 2021, XEFZ switched from news/talk "ABC Noticias" to sports talk "ABC Deportes". At the same time, XHGBO-FM 92.1 was switched to simulcasting the new sports talk format from carrying sister station XEBJB-AM 570.