Mazda CX-9 rear liftgate has no power, possibly related to discharged battery on Mazda CX-9

Some Mazda CX-9 owners report experiencing issues with the rear liftgate having no power, particularly after a battery replacement or discharge. These owners may find that disconnecting the negative battery terminal and depressing the brake pedal for 1-2 minutes can help reset electronic modules if the liftgate won't open despite a functioning fuse. Additionally, some owners have encountered problems with the power liftgate fuse located in the engine bay, which should be checked to ensure it is not blown. A failing liftgate latch may also be the culprit, requiring inspection and potentially costing around $100 for replacement. Furthermore, some owners face power-related issues due to inadequate battery recharging, which may be addressed under warranty by Mazda. Lastly, those with models affected by software control issues might need to visit a dealer for necessary updates, as Mazda has released fixes for improper control software in certain vehicles.