2020 Honda Odyssey Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

The 2020 Honda Odyssey does not support DIY on-board programming for its key fob. This means you cannot program a new key fob yourself using a series of ignition cycles or button presses. The vehicle's advanced security system and immobilizer require specialized diagnostic equipment to link a new key fob to your car's computer.

To program a new key fob for your 2020 Honda Odyssey, you will need to visit a Honda dealership or a qualified automotive locksmith. They have the necessary scan tools and software to perform the programming procedure.

Battery replacement

Replacing the battery in your 2020 Honda Odyssey key fob is a straightforward process:

1. Locate the small release button or tab on the side of the key fob. Press it to release the integrated emergency key, then pull the key blade out.
2. With the key blade removed, you'll see a small slot or indentation along the seam of the key fob casing. Use a small flathead screwdriver or a coin to gently pry open the two halves of the key fob.
3. Carefully separate the two halves to reveal the circuit board and the CR2032 coin cell battery.
4. Note the orientation of the battery (usually positive side up). Gently pry out the old battery using a small non-metallic tool or your fingernail.
5. Insert the new CR2032 battery with the positive (+) side facing up.
6. Align the two halves of the key fob case and press them firmly together until they click into place.
7. Reinsert the emergency key blade.

Test the key fob to ensure it functions correctly.

Where to buy a replacement fob

When considering where to purchase a replacement key fob for your 2020 Honda Odyssey, you have several options, each with pros and cons:

• Honda Dealership:
  • Pros: Guaranteed genuine OEM part, expert programming, warranty support.
  • Cons: Most expensive option. Expect to pay $200 - $350 or more for the fob itself, plus $100 - $200 for programming and key cutting.
• Automotive Locksmith:
  • Pros: Often more affordable than a dealership, can provide both the fob and programming services, some offer mobile services. Locksmiths typically use high-quality aftermarket fobs or OEM parts.
  • Cons: Quality can vary between locksmiths; ensure they specialize in automotive keys.
  • Cost Expectation: Fob and programming typically range from $150 - $300.
• Online Retailers (e.g., Amazon, eBay):
  • Pros: Potentially the cheapest option for the fob itself. Wide selection of OEM and aftermarket fobs.
  • Cons: You're only buying the physical fob; you'll still need to pay a locksmith or dealer for programming and cutting. Risk of purchasing a non-compatible or low-quality fob. No returns if programming fails due to an incompatible fob.
  • Cost Expectation: Fob alone can be $40 - $100, but remember to add programming and cutting costs.

If on-board programming isn't supported

As mentioned, the 2020 Honda Odyssey requires professional equipment for key fob programming due to its advanced security features, including the immobilizer system. The immobilizer is a security measure that prevents the engine from starting unless the correct transponder chip (embedded in your key fob) is recognized by the vehicle's computer.

When a new key fob is programmed, the scan tool communicates with the vehicle's immobilizer system to register the unique transponder ID of the new fob. This ensures that only authorized keys can start your vehicle, providing an important layer of anti-theft protection.

Cost Expectations for Professional Programming:

• Dealership: As noted above, expect to pay $100 - $200 just for the programming aspect, in addition to the cost of the key fob itself.
• Automotive Locksmith: Locksmiths typically charge $75 - $150 for programming services. This is often part of a bundled price if you purchase the fob from them.

Always call ahead to confirm pricing and ensure the dealership or locksmith has the necessary equipment for your specific year and model.

Find a mobile locksmith or shop on Repairius.