[Update] Locked out of my Simson S51 B1 4 - don’t have the key code

4044 views - Last reply: March 30, 2025
This topic is closed for new replies.
Airjordan
Member since November 2021 • 101 posts

How do I obtain the key code to program a Simson S51 B1 4 key fob?

Posted on March 30, 2025
Adminbot
Staff Member • 1543 posts

Hello! We've developed a VIN-based tool to help you get your key code for the Simson S51 B1 4. Check it out here: VIN Key Code Generator.

Posted on March 31, 2025

Replies (5)

Purplerain
Member • 107 posts

Anyone try this on a Simson S51 B1 4 with push-button start?

March 31, 2025 Reply
Shadowfax
Member • 126 posts

Same issue here. Let’s hope it works for my Simson S51 B1 4.

April 01, 2025 Reply
Vectorprime
Member • 84 posts

Got a dead key fob for my Simson S51 B1 4. Need the code badly.

April 02, 2025 Reply
Yellowfin
Member • 111 posts

Why is finding a key code on a Simson S51 B1 4 this hard?!

April 03, 2025 Reply
Quicksilver
Member • 91 posts

Thanks for sharing! Been looking for a key code fix for my Simson S51 B1 4.

April 04, 2025 Reply

Check the news !

Lowrider Spectacular
🏎️ Local Meetup: Lowrider Spectacular
Where car culture comes alive in your community

🗺️ Where: Industrial Park
⏰ When: May 16 @ 10AM-6PM

Event features:
Tech Sessions | DIY Demonstrations

🔩 Forum Members: Post your ride in our event discussion thread! 👍

🔧 Off-Road Vehicle Build Day

👨‍🔧 Instructors:
• 4x4 Builder Mark Jensen
• Paint Specialist Sarah Chen

🛠️ Hands-On Activities:
• Differential rebuild workshop
• 4-hour intensive training
• Personal coaching

📝 Skills Covered:
Multimeter use | Wiring diagrams | Short circuit tracing

🚗 May 20, 2026 at 12:00 PM (4-hour)

🔥 Bring your own project - we'll help you work on it!

Workshop: Off-Road Vehicle Build Day
Dyno Tuning Intensive Course

🔋 Dyno Tuning Intensive Course

🧰 Instructor: Classic Muscle Tuner Tom 'Torque' Jenkins

📱 Workshop Includes:
• Emission-legal power gains
• 4-hour intensive hands-on training
• Traction control tuning | Launch control setup

📉 Bonus: Personalized setup recommendation

🔌 Next Session: May 8, 2026 at 4:00 PM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Warning: Cheap parts often cost more in the long run due to failures

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

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

Cost & Options
Quality aftermarket keys work well for most vehicles at lower cost. However, some luxury brands use proprietary technology only available through dealers. For expensive cars, OEM may be worth the extra cost for reliability.
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 Programming
Some vehicles allow DIY key programming using specific sequences (like turning ignition on/off with original keys). However, most modern cars require specialized equipment only locksmiths or dealers have. Check your owner's manual for your specific model.
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 Tip: Avoid exposing key fobs to water or extreme temperatures
Key Fob Issues
1) Find the seam and pry open the fob (some have tiny screws) 2) Note battery orientation 3) Remove old battery (CR2032 is most common) 4) Insert new battery 5) Reassemble. Test all buttons - if issues remain, the fob may need reprogramming.
Key Tip: Store your key code separately from your keys
Key Fact: The average driver will lose 1-2 car keys during ownership

🔑 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: 932-516-8227
Key Fob Repair & Battery Replacement
$25+
Posted: Apr 28, 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: 641-647-1326
Fleet Key Programming
Call
Posted: Apr 20, 2026
Commercial key services for businesses with multiple vehicles. Bulk discounts available. We can handle all your company cars, trucks, and fleet vehicles.
Call: 500-225-7894
Dealer Alternative Key Service
40% Less
Posted: Apr 27, 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: 578-509-1186
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Seminar
Apr 30, 2026

Anti-Theft System Demonstration

by Immobilizer Experts
Step-by-step instruction for repairing common key fob issues including button and circuit problems
Seminar
May 18, 2026

Lost Key Solution Roadshow

by Car Key Solutions
Live demonstration of the latest anti-theft technologies and bypass prevention methods
Seminar
May 12, 2026

Immobilizer System Seminar

by Car Key Solutions
Hands-on training for programming transponder keys, smart keys, and fobs using professional tools
Seminar
May 6, 2026

Dealer-Level Programming Workshop

by Fob Fixers
Step-by-step instruction for repairing common key fob issues including button and circuit problems

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