Last updated on December 16th, 2019 at 04:43 amHow to make a Complaint to Toyota You should call Toyota complaints line in the first instance on 800-331-4331. Lines are open from M-F 7:00 a.m. – 7:00 p.m. CT Sat. 7:00 a.m. – 4:30 p.m. CT. If this does not resolve matters, then further steps can be