How to Replace the Battery in a 2017 Lexus RX 350 Key Fob

How to Replace the Battery in a 2017 Lexus RX 350 Key Fob

If your Lexus keyless entry remote is no longer working perfectly, the battery probably needs to be changed. In this article, we demonstrate how to disassembly your car key fob and replace a dead or weak battery DIY. If you decide to do it at home near RX 350, use this instruction, but first make sure you have tools and materials required before you start.

What size battery does 2017 Lexus RX 350 remote key fob required

Prior to disassembly remote key fob check all that you need: flat head screwdriver and CR2032 battery.
  • flat head screwdriver
  • 1xCR2032 battery

Step by step guide

A small coin battery installed inside the your key fob. Move the key out of the way if it is in the key fob.

Carefully try to disassemble your fob with pry tools. Change one CR2032 battery with flat head screwdriver.

Change old battery with new one CR2032. Battery must be installed with the same polarity as was a previous. Your keyless entry remote will not work if you by mistake put battery wrong way.

Before assembling keyless entry fob's case, verify that all working fine by testing buttons on circuit board.

The last thing to do is put your cover back on fob. Carefully try to put the two halves together by hands from top to bottom. If your key shell firmly closed, we done. If not, repeat the last step.

How to change the battery video instruction

DIY - LEXUS How to change SmartKey Key fob Battery on Lexus RX350 ES350 RX450

Still not working? Buy new one

Frequently Asked Questions

Keyless entry remote of Lexus RX 350 require 1xCR2032 batteries. Price for CR2032 batteries are under $5 depending on the brand, size packaging and type you buy. Take your old battery to the store, to be sure.

Often, after key battery replace, you do not need to reprogram. Don't be scare of this procedure, because often it's described in user's manual.

Replacing your keyless entry remote battery is easy to do in 2017 Lexus RX 350. Most of car manufacturers think about customers and make a special hole for key fob disassembly.

Dealer service price for replace the battery in key is from $30 to as high as $500 depending on the brand.

Keyless entry remote batteries in modern cars should be replaced once in three years, also this will differ based on frequency of use and build quality. If your key fob decreased signal strength, you should replace batteries before it stop working and make trouble for you.

These signs will warning you that it's possible time to replace battery in your Lexus RX 350: signal strength reduced, low key battery indicator on dashboard, key fob buttons not working and multiple clicks to unlock or lock doors required.
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Fob Compatibility:

  2. Models: 2016-2018 Lexus RX350