How to Start a Toyota, Scion or Lexus with a Dead Key Fob
Starting Your Toyota, Scion or Lexus
- First, if you are still locked out, click here for help getting inside!
- Second, for video help, click here.
- Finally, if you need or want another manufacturer, click here.
For the majority of Toyota Motor Co. vehicles, the requirement is simple. Hold the Smart Key fob against the Start / Stop 
ignition button with the Toyota, Scion or Lexus logo facing the button or switch. Press the Start / Stop button, keeping the brake pedal depressed. You can even press the button with the fob itself.
In truth, a buzzer will sound when the fob is touched to the Start / Stop button. If the button is pressed within five seconds of the buzzer sounding, the vehicle will start, assuming the brake pedal remains depressed.
The new (2020) Toyota Supra is an exception. There is an image of a key with lines radiating from it on the side of the steering column. Hold the back of the remote control (NOT the tip like the image) against the marked area on the steering column and press the Start/Stop button within 10 seconds while depressing the brake.
Another exception is the Toyota Prius in the 2004 through 2009 model years. These cars have a slot beneath the Start/Stop button that will accept the key fob. Insert the fob, buttons up, then press the Start/Stop button while depressing the brake pedal as normal.
A final exception (right) is found in early Lexus LS models. It uses a key fob with a tapered end and a start cylinder that is turned to start the car. In this case, the taped end of the fob is inserted into the start cylinder. The car will recognize the key fob, which can then be used to turn the cylinder.
Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text 
message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
Click here for video help with these models and key fobs.
Models covered include the Lexus CT, ES, GS, GX, IS, LS, LX, NX, RC, RX, RZ, TX, UX, and Toyota FR-S, iA, iM, tC, 4Runner, Avalon, Camry, Corolla, Highlander, Land Cruiser, Mirai, RAV4, Sequoia, Sienna, Tacoma, Tundra, Yaris, 86, C-HR, Supra, and Prius.
…. Return to Part I, Getting In
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY
Four key fob (remote control or ‘clicker’) versions may be seen in Toyota, Lexus and Scion models. The earliest version (left), used only in the Lexus LS for a few years, the mechanical key remains attached to the key fob. Pull the latch found on top of the fob. At the same time, slide the lever on the side upward until the key blade is fully exposed.
The mechanical key is removed from the remaining fob styles. Slide the catch on the top of most Lexus key fobs, or on the side of Toyota and Scion models. Some later 
Lexus models use this key as well. Pull the key ring from the fob while the catch is slid to one side to remove the emergency or mechanical key blade.
A slight variation in even later Lexus models has the slide lever on the top of the key ring end, but not on the mechanical key itself. Slide the lever and pull the key ring away to retrieve the mechanical key.
If the keyhole is not visible, insert the mechanical key into the slot at the base of the door lock cover located near the back of the driver’s door handle and lift slightly to pry away the lock cover and expose the lock cylinder. If you are in the dark, you may need to feel for the slot. Yes, you must pry off a piece of the car. Insert the key blade into the now-exposed lock cylinder to operate. The key can only be inserted in one direction, so turn the key over and try again if it does not go in the first time.
If you do not see a seam or a keyhole, you have the latest Lexus models, the NX, UX and RC as well as RX models built after 2016. This door handle style has since been incorporated into ES and LS models. Pull the driver’s door handle out as shown in the image to expose the keyhole. Insert the mechanical key and turn and you’re in. There is only a small amount of space, so actually turning the key can be a chore.
If you are fortunate enough to own the Lexus LC models, the door handles are flush to the body. Press the front of the driver’s door handle inwards, then pull the rear of the handle out. The key hole is then exposed behind the rear portion of the handle. As above, insert the key and turn and you’re in.
Finally, with the re-introduced Toyota Supra in 2020 come open and start features clearly taken from BMW! The key hole is hiding behind an oval shaped cover at the back of the driver’s door handle. Pull the door handle out and feel for a metal clip is behind the cap and give it a push outward.
The cap will practically fly off revealing the key cylinder. You are still removing a piece of your car and its still ok! Let go of the handle and use the mechanical key to unlock the door using the key cylinder that is now visible through the handle and you’ll be inside.
New in 2023, Lexus NX, RX, RZ and TX feature a rectangular pry off cover (right) at the back of the driver’s door handle. Slip a credit card or some equivalent into a gap at the front of the cover and pry the cover outward. When the cover clears the handle, push it from the rear to remove it fully. The key hole will then be exposed.
New Car Problem? Your Dealer Wants the Call, No Matter Whose Frustration
A New Car Problem
It is an odd conundrum. Car dealers desperately wish that all drivers understood everything about their cars. And yet, given the alternative, the same dealers wants drivers to call them for answers whenever questions come up.
Any call is an opportunity to sell service, even warranty service, and the associated relationship and even dependency this builds between driver and dealer. However, there is an unrecognized danger here that has been experienced in the industry before. Customer fatigue.
In the late 1980s and early 1990s, Toyota correctly read into the frustrations of high-line automobile customers, principally those of Mercedes and BMW. Their vehicles, test beds for the latest and greatest features, tended to spend an inordinate amount in service bays. The end result was an entirely new line of vehicles that snared a lion’s share of the luxury car market by naming reliability, and thus customer convenience, as its mantra.
Unfortunately, that line, Lexus, while having raised service standards, now subscribes to those old mantras.
What is developing today, while different in scope, draws a close parallel to the events that resulted in the creation of the Lexus brand, not to mention Infiniti and Acura. The latest advanced features, while generally quite reliable, are not immune to requiring service. And many of these feature require a new level of driver participation. Navigation systems and Bluetooth connection requirements for example.
The problems experienced by drivers with the MyFord Touch system, while extreme, will hopefully serve to open some eyes in the industry. Turning the car into a rolling computer requires a level of knowledge that many, if not most, drivers do not have the time or patience to attain, and that may be simply out of reach for some.
So manufacturers struggle with wanting their customers dependent upon them, and simultaneously with educating those same drivers on the latest features. All too many drivers are frustrated, angry and at times even afraid of their vehicles. The landscape is ripe for a manufacturer who can find a new path to building cars that manage to include the latest and greatest while making their drivers a seamlessly connected part of the system.
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Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY