[Fixed] Need the key code to program a replacement key for my Honda MSX125 Grom

2872 views - Last reply: April 04, 2025
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Need my Honda MSX125 Grom's key code to program a new transponder key

Hello! We've developed a VIN-based tool to help you get your key code for the Honda MSX125 Grom. Check it out here: VIN Key Code Generator.

Replies (4)

I have the same Honda MSX125 Grom and I'm also trying to find the key code.

Following closely—this could be the fix I need for my Honda MSX125 Grom.

Following this for my Honda MSX125 Grom. Please update if it works!

My Honda MSX125 Grom is just sitting there waiting for a miracle like this.

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Security Systems
Some systems reset by: 1) Disconnecting battery for 15+ minutes 2) Using original keys in specific sequences 3) Professional diagnostic reset. Consult your manual - procedures vary. Persistent issues may require dealer-level tools.
Security Systems
An anti-theft system that prevents the engine from starting unless it detects the correct transponder chip in the key. The chip sends a unique code to the car's computer when you turn the ignition. No match = no start, even with a physically matching key.
Key Tip: Some locksmiths offer mobile key programming services
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You can buy fobs online, but: 1) Must match your exact model/year 2) Many still require professional programming 3) Cheap knockoffs may not work reliably. Some eBay/Amazon sellers offer programming instructions for DIY-friendly models.
Cost & Options
You can buy fobs online, but: 1) Must match your exact model/year 2) Many still require professional programming 3) Cheap knockoffs may not work reliably. Some eBay/Amazon sellers offer programming instructions for DIY-friendly models.
Key Programming
Professional key programming requires: diagnostic tools to access the immobilizer system, key code software, transponder programmers, and often proprietary manufacturer equipment. Some locksmiths and all dealers have these tools.
Key Tip: Store your key code separately from your keys
Key Fact: The average driver will lose 1-2 car keys during ownership

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