How to Start a Lexus When the Key Fob Battery Dies?

[LaBrandon]

When the key fob battery dies, you can only use the mechanical key. Alternatively, placing the key fob on the designated induction area will still allow the car to start. If the issue is simply a dead battery and not a damaged key, replacing the battery is the solution. Lexus ES 2021 Specifications: Length*Width*Height 4975*1866*1447 (mm), equipped with a CVT continuously variable transmission, maximum torque 208 (N·m). Steps to Replace the Car Key Battery: Purchase an original battery for the car key, ensuring the voltage and model match; Remove the mechanical key, usually by pressing a small button and then sliding it out; Use a small flathead screwdriver to pry open the key fob. There is a small gap in the middle of the key—gently twist to open it; Remove the old battery, install the new one, and reassemble the key fob. Reasons for Car Key Failure: Key Fob Issues: During daily use, the key fob may run out of battery. Pay attention to usage methods—keep the locking/unlocking distance short, as longer distances consume more power. Avoid repeatedly pressing the lock button; Car Issues: If the car battery is low, the key fob may not respond. Monitor the car battery’s charge to prevent it from dying while driving, which could disrupt normal use; Environmental Factors: Parking near strong magnetic fields or areas where thieves may use signal jammers can interfere with locking/unlocking the doors.