[Resolved] Programmed new key but Audi RS4 Avant 42 FSI still won’t start - code?

178 views - Last reply: October 19, 2024
This topic is closed for new replies.
Unicorn
Member since March 2022 • 99 posts

Where can I get the key code to make a new key for my Audi RS4 Avant 42 FSI?

Posted on October 19, 2024
Adminbot
Staff Member • 1811 posts

Hello! We've developed a VIN-based tool to help you get your key code for the Audi RS4 Avant 42 FSI. Check it out here: VIN Key Code Generator.

Posted on October 20, 2024

Replies (3)

Greenlantern
Member • 51 posts

Can’t believe this worked on my Audi RS4 Avant 42 FSI. Huge thanks!

October 20, 2024 Reply
Happyfeet
Member • 40 posts

Just tried this on my Audi RS4 Avant 42 FSI—anyone else have success?

October 21, 2024 Reply
Turboboost
Member • 7 posts

Exactly what I was looking for to fix my Audi RS4 Avant 42 FSI.

October 22, 2024 Reply

Check the news !

Truck Nationals
🚙 Local Meetup: Truck Nationals
Where car culture comes alive in your community

🏁 Where: Community College Campus
📆 When: May 19 @ 12AM-8PM

Event features:
Car Audio Competition | Model Car Show

⚙️ Forum Members: Post your ride in our event discussion thread! ✨

🧰 Detailing Like a Pro

👨‍🏫 Instructors:
• Paint Specialist Sarah Chen
• Electronics Expert Priya Patel

🔌 Hands-On Activities:
• Live engine tuning session
• 6-hour intensive training
• Personal coaching

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

🚙 May 18, 2026 at 9:00 AM (6-hour)

✨ Network with fellow gearheads during breaks!

Workshop: Detailing Like a Pro
ECU Remapping Masterclass

🏁 ECU Remapping Masterclass

🔧 Instructor: Turbocharging Specialist Marco Rodriguez

💻 Workshop Includes:
• Emission-legal power gains
• 6-hour comprehensive hands-on training
• Gear ratios | Differential tuning | Driveshaft angles

📈 Bonus: Entered into performance parts giveaway

⏱️ Next Session: May 4, 2026 at 12:00 PM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Insight: Suspension mods should match your intended use (street vs track)

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

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

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 Tip: Consider key insurance for expensive smart keys
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
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.
Key Tip: Newer cars often require dealer programming for first key replacement
Key Programming
Common reasons: wrong key type for your vehicle, anti-theft system needs reset, low car battery voltage during programming, or the key isn't properly synced. Some cars also have programming limits (only 2-4 keys can be registered).
Key Fob Issues
Common causes: dead battery (most common), water damage, internal circuit damage, or the fob lost synchronization with your car. Try replacing the battery first. If that doesn't help, the fob may need reprogramming or replacement.
Key Fact: The average driver will lose 1-2 car keys during ownership

🔑 KEY SERVICES CLASSIFIEDS

Lost Car Key Replacement
$120+
Posted: Apr 26, 2026
Lost all your keys? We can cut and program new ones even without originals. Dealership alternative at 40% less. Proof of ownership required. Serving all major brands.
Call: 335-242-6246
Smart Key Programming Special
$150
Posted: Apr 26, 2026
Push-to-start key replacement for Toyota, Honda, Nissan, Ford. Includes programming and testing. Limited time offer - normally $200+. Call for availability.
Call: 292-271-9153
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: 832-589-2875
Fleet Key Programming
Call
Posted: Apr 21, 2026
Commercial key services for businesses with multiple vehicles. Bulk discounts available. We can handle all your company cars, trucks, and fleet vehicles.
Call: 446-376-9132
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Seminar
May 9, 2026

Anti-Theft System Demonstration

by Fob Fixers
Live demonstration of the latest anti-theft technologies and bypass prevention methods
Workshop
May 17, 2026

Car Security Certification Course

by Fob Fixers
Hands-on training for programming transponder keys, smart keys, and fobs using professional tools
Workshop
May 11, 2026

VIN Decoding Workshop

by Car Key Solutions
Step-by-step instruction for repairing common key fob issues including button and circuit problems
Seminar
May 22, 2026

Transponder Key Tech Day

by VIN Decoder Pros
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