One problem related to carrier/rack has been reported for the 2017 Lexus IS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2017 Lexus IS based on all problems reported for the 2017 IS.
Episode 1: vehicle purchased new in January 2017. In February 2017, windshield cracked while driving down the road at approximately 70mph. No foreign object was seen or heard hitting windshield. Closest vehicle was approximately 40-50 yards in front of damaged vehicle. Episode 2: spring 2019, windshield cracked while driving down the road at approximately 50 mph. Small object heard hitting windshield (never seen). Again, closest vehicle was approximately 40-50 yards in front of damaged vehicle. Episode 3: July 2019, no evidence of when or how windshield cracked. Returned to car (covered parking garage) to find 8 inch crack in windshield.