It was released as a promotional single from their eleventh studio album Pacific Daydream on August 17, 2017, premiering on Beats 1.
[1] DIY described "Mexican Fender" as a "perfect three-and-a-half minute slice of giddy, upbeat power-pop, sprinkling Weezer’s trademark “oohs” all over, and has a smattering of self-awareness.
"[2] Andy Cush at Spin called the song a "spiritual sequel" to "In the Garage" from the band's 1994 self-titled release (aka the Blue Album).
The video features a seagull falling in love with a woman beach goer.
The beach goer is played by Chloe Mae, and the video was directed by Lior Molcho.