2019 Toyota Tundra Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2019 Toyota Tundra does not support DIY, on-board programming for its smart key fob system. This vehicle utilizes a sophisticated immobilizer system that requires specialized diagnostic equipment to program new smart keys. This means you won't be able to program a new key fob yourself by following a simple sequence of door openings or key turns.

Battery replacement

Replacing the battery in your 2019 Toyota Tundra key fob is a straightforward process:

1. Retrieve the emergency key: Slide the small release button on the side of the fob and pull out the metal emergency key. This will expose a small slot.
2. Pry open the case: Use a small flathead screwdriver or a coin in the slot you just exposed and gently pry the two halves of the key fob apart. Be careful not to damage the internal components.
3. Remove the old battery: Note the orientation of the battery (positive side up/down) and carefully remove it. The battery is a CR2032 coin cell.
4. Insert the new battery: Place the new CR2032 battery into the fob with the positive side facing the same way as the old one.
5. Reassemble the fob: Carefully snap the two halves of the key fob back together until it's securely closed. Reinsert the emergency key.

Where to buy a replacement fob

When considering where to purchase a replacement key fob for your 2019 Toyota Tundra, you have several options, each with its own pros and cons:

• Toyota Dealership:

  • Pros: Guaranteed genuine OEM part, often comes with programming services included. The most reliable option for compatibility.
  • Cons: Most expensive option. Expect to pay anywhere from $250-$400 for the fob and programming.

• Automotive Locksmith:

  • Pros: Often more affordable than a dealership. Many locksmiths have the necessary diagnostic tools to program smart keys. They can often cut the emergency key blade on-site. Can be a mobile service, coming to you.
  • Cons: Quality of aftermarket fobs can vary. Prices typically range from $150-$300 for the fob and programming, depending on the locksmith and whether you get an OEM or aftermarket fob.

• Online Retailers (Amazon, eBay, etc.):

  • Pros: Potentially the cheapest option for the fob itself. You can find both genuine OEM and aftermarket fobs.
  • Cons: You're only buying the physical fob. You'll still need to pay for programming (which, as mentioned, requires a scan tool) and key cutting separately. There's a risk of purchasing a counterfeit or incompatible fob if you're not careful. Fobs alone can range from $50-$150, but remember to factor in programming and cutting costs.

If on-board programming isn't supported

As established, the 2019 Toyota Tundra requires specialized equipment for key fob programming. This means you'll need to visit a Toyota dealership or a qualified automotive locksmith.

• Cost Expectations: The total cost will include the key fob itself, the programming service, and potentially cutting the integrated emergency key blade. Expect to pay anywhere from $150 to $400, with dealerships typically being on the higher end of that range.

• Immobilizer Transponder: The 2019 Tundra uses a sophisticated immobilizer system integrated into the smart key fob. This system communicates with the vehicle's engine control unit (ECU) to ensure that only authorized keys can start the vehicle. When a new key fob is programmed, its unique transponder code is registered with the vehicle's immobilizer system. This is why DIY programming isn't possible without the proper diagnostic tools to access and modify the vehicle's ECU data.

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