For 2021 4Runner owners, suspension and brakes draw the most complaints. On the suspension side, owners describe premature wear, unusual noises, and handling issues they consider abnormal for the vehicle's age and mileage. Brake complaints are more acute, owners report warning lights for low braking power and ABS malfunctions appearing suddenly, sometimes accompanied by noticeable loss of stopping ability. Steering complaints, the third most-reported system, involve looseness, wandering, or a vague on-center feel. A smaller cluster of owners reports intermittent backup camera blackouts, where the screen goes dark during reversing rather than displaying the expected view. A few reports also describe door lock actuators failing sequentially across multiple doors, including the driver's side and liftgate, over a period of months.
By System
- suspension6
- service brakes5
- steering4
- wheels3