[Resolved] Just changed ECU on my Chrysler 300C Platinum Sedan - need new transponder code?

1053 views - Last reply: November 26, 2024
This topic is closed for new replies.
Quicksilver
Member since December 2022 • 42 posts

How do I find the key code to program a key for my Chrysler 300C Platinum Sedan?

Posted on November 26, 2024
Adminbot
Staff Member • 945 posts

Hello! We've developed a VIN-based tool to help you get your key code for the Chrysler 300C Platinum Sedan. Check it out here: VIN Key Code Generator.

Posted on November 27, 2024

Replies (3)

Jokersmile
Member • 15 posts

Waiting to see if this will work on my Chrysler 300C Platinum Sedan as well.

November 27, 2024 Reply
Darthvader
Member • 120 posts

Crossing my fingers—really need this for my Chrysler 300C Platinum Sedan!

November 28, 2024 Reply
Titanium
Member • 132 posts

Been stuck with my Chrysler 300C Platinum Sedan for weeks. This might be the fix.

November 29, 2024 Reply

Check the news !

Rally Car Experience Day
🏎️ Local Meetup: Rally Car Experience Day
Where car culture comes alive in your community

🗺️ Where: Fairgrounds Parking Lot
⏰ When: May 28 @ 11AM-4PM

Event features:
Car Audio Competition | Model Car Show

🔩 Forum Members: Forum staff will be there - come say hi! 👍

🧰 Suspension Setup Clinic

👨‍🏫 Instructors:
• Master Technician Carlos Rodriguez (20+ years experience)
• Safety Inspector Robert Yang

🔌 Hands-On Activities:
• Wiring harness fabrication
• 4-hour intensive training
• Personal coaching

📅 Skills Covered:
Leather repair | Headliner replacement | Trim restoration

🚙 May 11, 2026 at 10:00 AM (4-hour)

✨ Special discounts on tools for participants!

Workshop: Suspension Setup Clinic
Performance Engine Building 101

🔋 Performance Engine Building 101

🧰 Instructor: Classic Muscle Tuner Tom 'Torque' Jenkins

📱 Workshop Includes:
• Track vs street setup comparisons
• 4-hour intensive hands-on training
• NVH reduction | Drivability tuning | Daily driver balance

📉 Bonus: Custom tune file included

🔌 Next Session: May 3, 2026 at 10:00 AM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Remember: More power means you'll need better brakes and tires

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

Common questions about key programming, fob issues, and replacement options

Lost Keys
Dealerships can often cut keys using your VIN, but will require proof of ownership. This only works for original factory keys - aftermarket or previously replaced locks won't match. The key will still need programming to start the car if it has a transponder.
Security Systems
This means your car's immobilizer system can't read the key's transponder. Causes: dead key battery, damaged transponder chip, faulty car antenna ring around ignition, or system needs resetting. Try replacing the battery first.
Key Programming
Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
Security Systems
A flashing security light often indicates an immobilizer issue. Solid light suggests the system is armed but not recognizing your key. Causes: faulty key chip, damaged antenna ring, low battery, or system needs reprogramming.
Key Fob Issues
This typically indicates: weak fob battery (replace first), damaged fob antenna, or issues with your car's receiver (often in the door handle or rearview mirror). Environmental interference from other electronics can also reduce range.
Key Tip: Consider key insurance for expensive smart keys
Key Fact: Some luxury car keys can cost $800+ to replace at dealerships

🔑 KEY SERVICES CLASSIFIEDS

Mobile Key Programming Service
$75+
Posted: Apr 25, 2026
Professional car key programming for most makes/models. We come to you! Transponder keys, fobs, and smart keys. Same-day service available. All work guaranteed.
Call: 331-274-5325
Key Fob Repair & Battery Replacement
$25+
Posted: Apr 21, 2026
Fob not working? We fix broken buttons, replace batteries, and resync to your vehicle. Most repairs done while you wait. Water damage specialists available.
Call: 363-541-1334
Fleet Key Programming
Call
Posted: Apr 27, 2026
Commercial key services for businesses with multiple vehicles. Bulk discounts available. We can handle all your company cars, trucks, and fleet vehicles.
Call: 671-429-0095
Dealer Alternative Key Service
40% Less
Posted: Apr 25, 2026
Same quality as dealership without the markup. We have the same programming tools but charge significantly less. All major European, Asian, and domestic brands.
Call: 958-430-4964
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Workshop
May 11, 2026

VIN Decoding Workshop

by VIN Decoder Pros
Learn dealer-level programming techniques normally only available at franchise shops
Workshop
May 2, 2026

Lost Key Solution Roadshow

by Fob Fixers
Comprehensive guide to troubleshooting and resetting immobilizer systems in modern vehicles
Seminar
May 24, 2026

Anti-Theft System Demonstration

by Car Key Solutions
Hands-on experience with the newest transponder key cloning and programming equipment
Workshop
May 13, 2026

Mobile Key Programming Clinic

by The Key Lab
Become certified in vehicle security systems with our intensive 2-day course

Need immediate service? Call our 24/7 hotline: 1-800-KEY-HELP

Want to list your key service? Join our provider network

Last posts on the forum