What To Do If Your Lexus Key Fob Battery Died. Most of todays fob keys will send a signal to the vehicle up to 50 feet in many cases. These batteries can last for 1-2 years and a low-battery alert will.

Using a spare key fob can be the best way to test whether the problem lies in the key or in the vehicle. Step 1 - Change the battery. A Lexus key fob that suddenly stops working is never a welcomed surprise.
Get out of the vehicle.
Press unlock on the. Before you curse the day here are a few steps that will help you determine your next course of action. Up to 20 cash back Ive change the battery in my keyfob on a 2006 lexus rx330 and now my car wont startbefore that the key fob wouldnt unlocked the doors. The most likely reason your Lexus is not starting after you change the battery is that the securityimmobilizer anti-theft feature disabled the engine start.

