2016 Toyota Tundra Key Fob Programming Guide

This guide provides comprehensive instructions for programming new key fobs for your 2016 Toyota Tundra, along with essential information about replacement options and costs.

Quick reference

Item	Detail
FCC ID	GQ4-29T
OEM Fob PN	89070-0C050, 89745-04020
Aftermarket Options	Remote: Keyless2Go HYQ12BDM; Key: Keyless2Go K2GTYA20T
Battery Type	CR2032
Programmable On-Board?	Yes, for the remote function
Cuts Required?	Yes, for the key blade

Step-by-step on-board programming (Remote Function)

The 2016 Toyota Tundra supports an on-board programming procedure for the key fob's remote functions (lock, unlock, panic). This procedure will not program the immobilizer transponder chip, which is required for starting the vehicle. The transponder chip must be programmed separately by a locksmith or dealer.

Before you begin:

• Gather all existing working key fobs and any new ones you wish to program. This procedure will erase all previously programmed remotes, so you must reprogram all of them at once.
• Ensure all doors are closed and unlocked.

1. Insert the master key (a programmed key that starts the engine) into the ignition.
2. Turn the ignition from OFF to ON five times, then leave it in the OFF position on the fifth turn.
3. Open and close the driver's door six times.
4. Remove the master key from the ignition.
5. Insert the new key you wish to program into the ignition.
6. Turn the ignition from OFF to ON once.
7. After 1-3 seconds, the security light should illuminate and remain on for 2 seconds, then turn off. This indicates the vehicle is in programming mode.
8. Press any button on the new key fob within 30 seconds. The security light will flash, indicating successful programming.
9. If you have additional fobs to program, repeat step 8 for each additional fob within 30 seconds of the previous one.
10. To exit programming mode, remove the key from the ignition, or close the driver's door.

Important: If the vehicle does not enter programming mode or the security light does not respond as described, try repeating the steps carefully. If you continue to have issues, a professional locksmith or dealer may be required.

Battery replacement

The 2016 Toyota Tundra key fob uses a CR2032 coin cell battery. To replace it:

1. Locate the small slot or indentation on the side of the key fob. This is usually where the two halves of the fob meet.
2. Use a small flat-head screwdriver, coin, or similar thin object to carefully pry apart the two halves of the key fob.
3. Once open, you will see the circuit board and the battery. Note the orientation of the battery (positive (+) side up or down).
4. Gently pry out the old CR2032 battery.
5. Insert the new CR2032 battery, ensuring it is oriented correctly.
6. Snap the two halves of the key fob back together until they are securely closed.

Where to buy a replacement fob

When considering a replacement key fob for your 2016 Toyota Tundra, you have several options, each with pros and cons:

• Toyota Dealership:

  • Pros: Guaranteed genuine OEM part, often includes programming services, and ensures full compatibility.
  • Cons: Most expensive option, typically ranging from $200-$400+ for the fob and programming.

• Automotive Locksmith:

  • Pros: Often more affordable than a dealership (typically $150-$300 for parts and labor), can cut and program both the remote and the immobilizer transponder on-site, and often provides mobile services.
  • Cons: Quality of aftermarket fobs can vary; choose a reputable locksmith.

• Online Retailers (e.g., Amazon, eBay):

  • Pros: Cheapest option for the fob itself (often $20-$60), wide selection of OEM and aftermarket options.
  • Cons: Does not include programming or key cutting, risk of purchasing a non-compatible or low-quality fob. You will still need to pay for cutting and programming separately, which adds to the overall cost.

If on-board programming isn't supported (Immobilizer Transponder)

While the remote functions (lock, unlock) can be programmed using the on-board procedure, the most critical part, the immobilizer transponder chip, cannot. The immobilizer system is a security feature that prevents the engine from starting without the correct programmed transponder chip present.

To program the immobilizer transponder, you will need specialized diagnostic equipment. This typically requires a professional:

• Toyota Dealership: They have the proprietary tools and software to program the transponder chip. Expect costs for programming to be in the range of $80-$150, in addition to the cost of the key fob itself.
• Automotive Locksmith: Many locksmiths are equipped with advanced programming tools that can program immobilizer transponders. Their programming fees for the transponder are often similar to or slightly less than a dealership.

Cost Expectations for a fully functional key:

• DIY (Remote only): Free, if you purchase the fob online. You'll still need professional help for the transponder.
• Locksmith (Aftermarket Fob & Programmed): $150 - $300 (includes fob, cutting, and full programming).
• Dealership (OEM Fob & Programmed): $200 - $450 (includes fob, cutting, and full programming).

Find a mobile locksmith or shop on Repairius.