[Recommended Fix] Porsche 911 Type 991 won't start after battery swap - need transponder code?

3289 views - Last reply: March 15, 2025
This topic is closed for new replies.

Where can I find the key code to program keys for my Porsche 911 Type 991?

Hello! We've developed a VIN-based tool to help you get your key code for the Porsche 911 Type 991. Check it out here: VIN Key Code Generator.

Replies (5)

Looking for the same thing for my Porsche 911 Type 991, hope someone can help.

Trying this on my Porsche 911 Type 991 later. Will report back.

Crossing my fingers—really need this for my Porsche 911 Type 991!

I think my Porsche 911 Type 991 has the same issue. Good to know I'm not alone.

I’m in the same boat with my Porsche 911 Type 991. This looks promising.

Check the news !

Annual Muscle Car Meetup
🚗 Local Meetup: Annual Muscle Car Meetup
Show off your ride and meet fellow car lovers

📍 Where: Brewery District
📅 When: May 11 @ 11AM-7PM

Event features:
Club Displays | Trunk Swap Meet

🔧 Forum Members: Who's going? Sound off in the comments! 👋

🧰 Classic Car Restoration Workshop

👨‍🏫 Instructors:
• Master Technician Carlos Rodriguez (20+ years experience)
• Race Engineer Emily Torres

🔌 Hands-On Activities:
• Interior restoration techniques
• 6-hour intensive training
• Personal coaching

📅 Skills Covered:
Gear patterns | Bearing preload | Locker installation

🚙 May 14, 2026 at 9:00 AM (6-hour)

✨ Early registrants get preferred work bay access!

Workshop: Classic Car Restoration Workshop
ECU Remapping Masterclass

🏁 ECU Remapping Masterclass

🔧 Instructor: Data Acquisition Expert Priya Patel

💻 Workshop Includes:
• Live dyno tuning demonstrations
• 6-hour comprehensive hands-on training
• Turbo sizing | Intercooling | Wastegate control

📈 Bonus: 20% discount on performance parts

⏱️ Next Session: May 10, 2026 at 11:00 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

Cost & Options
1) Always have at least 2 working keys 2) Get spares made before losing originals 3) Consider key insurance/add-on coverage 4) Store key codes safely 5) Use protective cases for smart keys 6) Program new keys before old ones fail completely.
Key Tip: Replace key fob batteries every 1-2 years as preventative maintenance
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.
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.
Key Tip: Avoid exposing key fobs to water or extreme temperatures
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.
Key Programming
Programming syncs the key's transponder chip with your car's immobilizer system. The process varies by manufacturer but generally involves: 1) authenticating with the car's computer 2) erasing old keys if needed 3) programming new key codes 4) testing functionality.
Key Fact: Some insurance policies offer key replacement coverage

🔑 KEY SERVICES CLASSIFIEDS

Smart Key Programming Special
$150
Posted: Apr 22, 2026
Push-to-start key replacement for Toyota, Honda, Nissan, Ford. Includes programming and testing. Limited time offer - normally $200+. Call for availability.
Call: 283-880-3341
Anti-Theft System Repair
$85+
Posted: Apr 29, 2026
Fixing security light issues, PATS systems, and ignition immobilizers. Proper diagnosis before repair. Most vehicles serviced same day. Warranty on all work.
Call: 311-736-3742
Fleet Key Programming
Call
Posted: Apr 25, 2026
Commercial key services for businesses with multiple vehicles. Bulk discounts available. We can handle all your company cars, trucks, and fleet vehicles.
Call: 453-737-9335
Key Fob Case Replacement
$35
Posted: Apr 29, 2026
Cracked or damaged fob housing? We transfer your electronics to a new case. Multiple color options available. Most models in stock. 15-minute service.
Call: 846-908-3323
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Workshop
May 4, 2026

VIN Decoding Workshop

by Fob Fixers
Live demonstration of the latest anti-theft technologies and bypass prevention methods
Workshop
May 27, 2026

Lost Key Solution Roadshow

by VIN Decoder Pros
Become certified in vehicle security systems with our intensive 2-day course
Seminar
May 24, 2026

VIN Decoding Workshop

by Auto Key Masters
Become certified in vehicle security systems with our intensive 2-day course
Workshop
May 10, 2026

VIN Decoding Workshop

by The Key Lab
Comprehensive guide to troubleshooting and resetting immobilizer systems in modern vehicles

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