Finally figured out how to program a spare key for the GX without Techstream, after the dealer quoted me $550 + tax. Absolutely insane. All-in cost for me was $240. $80 for the key and $150 for a tool I'll absolutely use in the future.
An overall straightforward experience, but had a lot of questions/guesswork along the way. This walkthrough will make things crystal clear for folks wanting to do this themselves.
What you'll need (all purchased with my own money)
1. A key already programmed to the car
2. Launch Creader Elite V3 T (Amazon Link) -- currently listed at $210, picked mine up on sale for $150. Think of it as a handheld Techstream replacement. No second laptop, no shady resellers, no incompatible cables. Loaded with functionality for any DIYer. At $150 it was a no-brainer.
3. OEM GX Key Fob (eBay Link) -- $75. A few notes on buying secondhand.[indent=40px]-FCC ID must be HYQ14FBF
Once you have both keys and the Launch Creader, you're ready to go. The programming process takes about 15 minutes.
Programming Steps:
From here, follow the on-screen prompts. Before starting, make sure all other keys and phones are out of the car to reduce interference. When prompted, tap your already-programmed key to the ignition button -- you'll hear one beep. Then tap the new key to the ignition button -- two beeps. That's it, you're done.
Total out of pocket: $240, including a tool you'll reach for again for future diagnostics and wrenching.
An overall straightforward experience, but had a lot of questions/guesswork along the way. This walkthrough will make things crystal clear for folks wanting to do this themselves.
What you'll need (all purchased with my own money)
1. A key already programmed to the car
2. Launch Creader Elite V3 T (Amazon Link) -- currently listed at $210, picked mine up on sale for $150. Think of it as a handheld Techstream replacement. No second laptop, no shady resellers, no incompatible cables. Loaded with functionality for any DIYer. At $150 it was a no-brainer.
3. OEM GX Key Fob (eBay Link) -- $75. A few notes on buying secondhand.[indent=40px]-FCC ID must be HYQ14FBF
-The key must be listed as "ready to program," "unlocked," or "virginized" -- meaning it has been unlinked from its previous vehicle and is ready to pair to yours.
-Confirm compatibility with your specific GX model year. Other Lexus models may share the same FCC ID but not be compatible. The first key I bought was from an ES and failed to link.
-One seller to avoid: 1010keys. Keys are not OEM (not necessarily a dealbreaker), but I a frustrating experience with the seller. Won't get into the details here, but returned for a full refund. Can't recommend them.
Once you have both keys and the Launch Creader, you're ready to go. The programming process takes about 15 minutes.
Programming Steps:
- Turn the car to "Ignition On" mode (press the ignition button twice without your foot on the brake). Do not start the engine.
- Plug the Creader into your OBD-II port and power it on. From the home screen, tap "Local Diagnose."
- Tap "AutoDetect." The tool will scan and identify your vehicle automatically.
- Select "Automatic Search (North America)" -- adjust if you're outside North America.
- Confirm your vehicle details on the Vehicle Information screen and tap "OK." You should see GX460, 2020, 1UR-FE.
- Let the Health Report run to completion. This scans all systems and takes a few minutes.
- When the Basic Diagnosis Report screen appears, tap the back arrow (top left) to return to the Diagnostic Trouble Code screen.
- Scroll down and tap "Smart Access (SA)."
- Tap "Special Function."
- Select "Smart Code Registration (Classic)" or "Smart Code Registration" -- I used the Classic option.
- Select "I am just registering keys."
From here, follow the on-screen prompts. Before starting, make sure all other keys and phones are out of the car to reduce interference. When prompted, tap your already-programmed key to the ignition button -- you'll hear one beep. Then tap the new key to the ignition button -- two beeps. That's it, you're done.
Total out of pocket: $240, including a tool you'll reach for again for future diagnostics and wrenching.
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