One problem related to battery cable has been reported for the 2020 Toyota Camry. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2020 Toyota Camry based on all problems reported for the 2020 Camry.
Found service bulletin tsb00007-19 growing number of customer concerns about needing a new battery after 1 year. I brought my 2020 Toyota Camry into daytona Toyota for diagnosis of dead battery issue-technician took 8 hours and suggested I must have left the door or trunk open. Technician did say I should have received a new battery which is a new design, part #00544h6074770. This battery is rated at 770cca vs my battery which is rated at 560 cca. The new battery actually checks out at 990 cca! technician said it is the newly designed battery for the Toyota Camry and rav4 and would greatly reduce dead battery problem, however Toyota would not authorize a replacement. I have spent 2 full days chasing this problem at 2 dealerships and Toyota says it is my fault for leaving a door, hood, or trunk open-absurd! this is truly lousy service on a brand new vehicle with an underlying serious problem. For the immediate time I disconnect the battery cable when not going to use the care for 4 or 5 days. This vehicle needs a recall for battery or underlying drainage problem. Also see kelly blue book for many complaints about this.