The 2017 Auto Club 400 is a Monster Energy NASCAR Cup Series race that was held on March 26, 2017, at Auto Club Speedway in Fontana, California. Contested over 202 laps, extended from 200 laps due to overtime, on the two-mile (3.2 km) D-shaped oval, it is the fifth race of the 2017 Monster Energy NASCAR Cup Series season.

Auto Club Speedway was a 2.000 mi (3.219 km), D-shaped oval superspeedway in unincorporated San Bernardino County, California, near Fontana. It hosted National Association for Stock Car Auto Racing (NASCAR) racing annually from 1997 until 2023. It was also previously used for open wheel racing events. The racetrack is located 47 mi (76 km) east of Los Angeles and is near the former locations of Ontario Motor Speedway and Riverside International Raceway. The track is owned and operated by NASCAR. The speedway is served by the nearby Interstates 10 and 15 freeways as well as a Metrolink station located behind the backstretch.