How to Remote Start Your Lexus RX 350

Double-click the LOCK button on your key fob or use the Lexus mobile app to remote start your Lexus RX 350.
Written by Olivia Rose
Reviewed by Jessica Barrett
To remote start your Lexus RX 350, double-click the LOCK button on your key fob, then press and hold the LOCK button on your key fob for three seconds. You can also remote start using the Lexus app.
  • All Lexus vehicles from 2015 and later have remote start capacity.
  • You can remote start your RX 350 using your mobile device or key fob.
  • Your hazard lights will flash to notify you that the engine is starting.
  • The vehicle will run for 10 minutes before automatically shutting off.

How to remote start your Lexus RX 350

You can use your key fob or mobile device to remote start your equipped Lexus. Whether you use the fob or your smartphone, your RX 350 will run for 10 minutes and then automatically shut off if no activity is detected. 

Remote start with the key fob

  1. Press the LOCK button on your car fob
    twice within 2 seconds. You can think of this as a “double-click” to make it easy. 
  2. Press and hold the LOCK button on your key fob for 3 seconds. 
  3. Your turn hazards should flash and your engine will turn on.

Remote start with a mobile device

  1. Download the Lexus app from Google Play or the App Store onto your mobile device (if you haven’t already). 
  2. In the Lexus app, verify your country and language, then click SIGN-IN or MAKE AN ACCOUNT. 
  3. Enter your RX 350 into the Lexus app and activate Enform Remote service for your car. 
  4. Press and hold the START button on the home screen of your Lexus app.
  5. Your hazard lights should flash and your Lexus RX 350 engine will start.
Note: You only have to perform those first three steps once. If your account is already set up, all you have to do is open the Lexus app to remote start your car from your phone.

How to turn off the engine remotely

Remote turn-off with key fob

Option 1: Press and hold the LOCK button on your key fob for at least seconds to remotely shut off your Lexus RX 350 engine. This method keeps your car doors locked—so we generally recommend it as the most secure method. 
Option 2: Alternatively, you can press the UNLOCK button on your key fob. This will both turn off the engine and unlock your car doors. If no activity is detected, your vehicle doors will relock shortly after. 

Remote turn-off with a mobile device

In your Lexus app, press and hold the STOP button. Look for the flash of your lights to indicate that the engine has started.
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Lexus RX 350 remote start tips and tricks

Hold on! Before you get carried away remote starting your engine like there’s no tomorrow, take a look at our tips and tricks for using your Lexus remote start system. 
  • Verify ventilation: You should only remote start your Lexus RX 350 if it is in a well-ventilated area—which usually means outside. If you remote start your Lexus RX 350 in, say, an enclosed garage, you run the risk of toxic carbon monoxide buildup, which can be deadly. 
  • Watch out for flammable material: Be wary of oil, grease, or other flammable materials near your car—best to move your RX 350 to a safe spot before using your remote start. 
  • Mind the clock: If you want your engine to stay on more than the original 10-minute run time, just repeat these steps to initiate another start ignition process.

All Lexus models from 2015 or later have remote start

If your Lexus was manufactured in 2015 or later, it’s compatible with Lexus Enform Remote, and you can use your mobile phone to remotely start the car. 
Here are some of Lexus’s models that can come with factory remote start: 
  • Lexus NX
  • Lexus UX
  • Lexus IS
  • Lexus ES
  • Lexus LS
  • Lexus GX
  • Lexus LX
If you have a vehicle listed above but you can’t get the remote start system working, ask a dealer about a firmware update.

Adding remote start to an older Lexus model

Theoretically, you should be able to add a plug-and-play remote start kit to a Lexus that doesn’t already have a factory-equipped system, but be sure to speak with a Lexus dealership before installing it. Non-OEM modifications could invalidate your warranty.
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FAQs

All Lexus RX 350s manufactured after 2015 are enabled with Lexus remote start.
It takes about two to five seconds, depending on whether you use the Lexus key fob or the mobile app on your smartphone.
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