How do you remote start a Lexus 300?

In brief, you can remotely start a Lexus 300 either with the factory key fob (where supported) or through the Lexus smartphone app if your model year and region offer remote-start features. The exact steps depend on the vehicle’s year and equipment, so always refer to your owner’s manual for model-specific instructions.

This article explains two common methods: using the key fob for models that support built‑in remote start, and using the Lexus app for compatible vehicles with connected services. It also covers safety notes, typical run times, and compatibility considerations to help you determine which option applies to your Lexus 300.

Using the key fob remote start

The following steps describe the standard remote-start process via the vehicle’s key fob on many Lexus 300 models with SmartKey. If your vehicle doesn’t support key‑fob remote start, skip to the app-based method.

1. Ensure all doors are closed, the vehicle is in Park, and the hood is closed.


2. Press the Lock button on the fob once to lock the doors.


3. Within a few seconds, press and hold the Lock button again for about 3 seconds. The engine should start and the climate system may begin to operate.


4. The engine will run for a limited duration (commonly 10–15 minutes) to warm or cool the cabin before automatically turning off if you do not drive the vehicle.


5. To stop the engine remotely, press the Lock button again or press and hold the Lock button for a moment until the engine shuts down, depending on your model.


6. When you’re ready to drive, unlock the doors, get in, press the brake, and press the Start/Stop button to drive as usual. If the car doesn’t start, check the fob battery and ensure you’re within range.

Remote-start availability and exact timing can vary by year and market, so verify that your Lexus 300 supports this feature and follow the steps in your owner’s manual if you notice any differences.

Remote start via the Lexus smartphone app

Many newer Lexus 300 models offer remote-start capabilities through the Lexus app (often tied to Safety Connect or Enform services). This method typically requires a active subscription or built‑in connected services and a registered vehicle in the app.

1. Confirm your vehicle is equipped for remote start via the Lexus app and that connected services are active for your account (this may include Safety Connect/Enform or the newer Lexus app features).


2. Install and open the Lexus app on your smartphone, then sign in with your Lexus account.


3. Select your vehicle from the app’s home screen.


4. Tap Remote Start (or a similarly labeled option) and follow the on-screen prompts to confirm. You may be asked to enter a PIN or use biometric authentication.


5. The vehicle will start remotely and the climate control will operate according to your last settings. The run time is usually configurable or defaults to a set period (often 10–20 minutes).


6. To stop remotely, tap Stop in the app or wait for the engine to shut off automatically as the run time expires, depending on the app version and settings.

Note that smartphone-based remote start requires the vehicle to be within cellular range and may be restricted by your region or subscription plan. If you don’t see Remote Start in the app, contact your Lexus dealer or check the app’s supported features for your model year.

Safety, limitations and compatibility

Remote-start features are subject to safety and legal constraints. The engine must not be started if occupants’ safety could be compromised, and many markets restrict remote starts from certain environments or times. Always ensure the vehicle is in Park, the area is ventilated, and you are aware of local regulations before using remote-start features.

Key compatibility notes to keep in mind:

• Not all Lexus 300 variants (IS 300, ES 300, GS 300, etc.) or model years support key fob remote start. Check your owner’s manual or contact a Lexus dealer to confirm.


• SmartKey/Remote Start features may require an active subscription or service plan (e.g., Safety Connect or the Lexus app’s remote features) and may have regional availability.


• Remote start duration and climate control behavior can vary by model year and equipment level.


• If the vehicle won’t start remotely, verify the fob battery, account status in the app, vehicle registration in the app, and that doors are closed and the car is in Park.

For the most accurate instructions, identify your exact model year and trim of the Lexus 300 and consult the owner’s manual or a local Lexus dealership. They can confirm whether the standard remote start via the key fob or the smartphone app is supported and provide model-specific steps.

Model-year and feature notes

The term “Lexus 300” can refer to several different models across generations (for example IS 300, ES 300, or GS 300 in older lineups). Remote-start availability, methods, and device requirements differ by year and market. If you’re unsure which features apply to your car, check your vehicle identification number (VIN) with your dealer, review the post-sale feature list, or consult the latest Lexus owner resources online.

Summary

Remote starting a Lexus 300 can be done with a compatible key fob or through the Lexus app, depending on the model year and region. The key fob method typically involves locking the doors, then holding the Lock button to start, with a limited run time. The app method requires activated connected services and a registered vehicle, with remote start initiated inside the app and controlled via the device. Always follow safety guidelines and verify feature availability for your exact vehicle to ensure proper use.

How to activate lexus remote start?

To activate Lexus remote start, you can either use the key fob or the Lexus app. For the key fob, press the lock button, then press it again within one second and hold for about three seconds until the lights flash. For the app, open the Lexus Enform Remote app on your phone, select "remote engine start," and follow the on-screen prompts. 
Using the key fob

1. Press the LOCK button on your key fob. 
2. Within one second, press the LOCK button again and hold it for about three seconds. 
3. The vehicle's hazard lights will flash to confirm the engine has started. 

This video demonstrates how to remote start your Lexus using the key fob: 33sMetro LexusYouTube · Feb 21, 2023
Using the Lexus app

1. Download and open the Lexus Enform Remote app on your smartphone.
2. Log in to your account and add your vehicle if you haven't already.
3. Select "remote engine start" from the app's home screen.
4. Follow the on-screen prompts to start your vehicle. 

Important considerations

• The remote start feature requires an active subscription to a connected service like Lexus Remote Start. 
• The vehicle must be in park with all doors, the trunk, and the hood closed. 
• The engine will run for a set time (e.g., 10-20 minutes) and shut off automatically. 
• Opening a door or pressing the brake pedal will turn the engine off. 

Can I remote start my Lexus with my key fob?

Yes, you can remote start many Lexus vehicles using the key fob by pressing the "LOCK" button twice and then holding it down on the third press until the lights flash. This feature is often included on models from 2015 or newer that have an active trial or subscription to a connected service like Lexus Enform Remote. 
This video demonstrates how to remote start a Lexus with the key fob: 57sJM LexusYouTube · Jan 20, 2024
Before you begin

• Ensure your vehicle has the necessary subscription (like Safety Connect or Enform Remote).
• Verify that the vehicle is parked, locked, and all doors, the trunk, and the hood are closed.
• Make sure the vehicle is in a well-ventilated area.
• Check that the fuel level is above a quarter tank. 

Step-by-step instructions

1. Press and release: the "LOCK" button on your key fob. 
2. Press the "LOCK" button again: within one second of the first press. 
3. Press and hold: the "LOCK" button until you see the vehicle's lights flash to confirm the signal has been received. 

You can watch this video to see a step-by-step demonstration of the process: 36sMichael LintermanYouTube · Aug 17, 2022
What to expect

• The engine will start, and the hazard lights will flash for about 20 seconds. 
• The engine will run for approximately 10 to 20 minutes before shutting off automatically. 
• To stop the remote start early, you may need to press and hold the lock button again. 
• When you get into the car, you will need to press the brake and start the engine to drive. 

How do I tell if my Lexus has remote start?

Your Lexus may have remote start if it's a model year 2015 or newer and is equipped with Enform Remote or the newer Lexus Interface multimedia system. To check for a key fob button, look for an arrow symbol or press and hold the lock button twice, then the engine may start. You can also use the Lexus app for remote start on newer models. 
How to check for and use remote start

• Check the key fob:
  • Look for a button with an arrow symbol or similar icon. 
  • Try pressing the lock button twice, then press and hold it for a few seconds. The engine may start, and the turn signals will flash. 
• Use the key fob: 
  • Press the lock button first. 
  • Within 5 seconds, press and hold the lock button again to start the engine. The turn signals will flash, and the engine will run for 10 minutes. 
  • To extend the time, repeat the process. 
  • To turn it off, press the remote start button again, and the signals will flash once. 
• Use the Lexus app: 
  • If your model year is 2022 or newer and has the Lexus Interface, you can use the Lexus app to start your vehicle remotely. 
  • For older models with Enform Remote, you can also use the app. 
• Important notes:
  • Your car must be locked before you can start it with the key fob. 
  • The engine will shut off after 10 minutes unless you extend the time. 
  • On some models, the climate control will try to reach a pre-set temperature of 72∘F72 raised to the composed with power cap F72∘𝐹 (or 77∘F77 raised to the composed with power cap F77∘𝐹 on some newer models). 
  • Be aware of local laws that may restrict remote start. 

36sHow to Remote Start Your Lexus from the Key Fob?YouTubeMichael Linterman · 3y 47sLexus Tech Tips - Remotely starting Lexus with key fobYouTubeJM Lexus · 1y 39sHow to Use the Remote Start on Lexus RX 350h & 450h #shortsYouTubeAutomotiveWoman · 11mo (function(){
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How to remote start Lexus IS 300?

To remote start a Lexus IS 300, you can use the key fob or the Lexus App. With the key fob, press the lock button three times, holding down the third press until the hazard lights flash. For the app, use the "Start Engine" feature after logging in and selecting your vehicle. Both methods require an active Enform Remote or Remote Connect subscription and that the vehicle is parked with all doors, the trunk, and hood closed. 
Using the key fob

• Make sure the vehicle is parked, all doors and the trunk are closed and locked, and the key fob is within range. 
• Press the Lock button on the key fob. 
• Press the Lock button again and, on the third press, hold it down until the hazard lights flash. 
• Your car's engine will start and run for approximately 10 to 20 minutes. The engine will turn off if a door is opened. 

This video demonstrates how to remote start your Lexus using the key fob: 48sLexus of JacksonvilleYouTube · Apr 8, 2021
Using the Lexus App

• Download and sign in to the Lexus App on your smartphone.
• Tap "Remote" and then "Start Engine".
• Confirm your request in the app. The app will notify you when the engine has started.
• This method can be used from almost anywhere with a cell signal. 

Requirements and considerations

• Subscription: You must have an active subscription to Lexus Enform Remote or Remote Connect. 
• Vehicle status: All doors, the trunk, and the hood must be closed and locked for the feature to work. 
• Fuel level: The fuel tank must have at least a quarter of a tank of gas. 
• Safety: Remote start is for warming up or cooling down the vehicle, not for use in an enclosed space. 
• Engine shutdown: Opening a door will automatically shut off the engine.