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Radio unlock guide

Audi A4 radio code

Recover the original security PIN for your Audi A4 audio system (Concert, Symphony, MMI 3G, MMI Navigation Plus, and Virtual Cockpit) without visiting a car service centre. Submit the serial number online and we decode it remotely.

Recover unlock codeRead the FAQ

Quick facts for Audi A4 owners

Typical turnaround time

Instantly (ready in minutes)

Head unit brands

Blaupunkt, Panasonic, Continental, Harman, Delphi, and Bose

Infotainment systems

Concert, Symphony, MMI 3G, MMI Navigation Plus, and Virtual Cockpit

Popular model years

2001-2023

Example serial numbers

Typical serial numbers you may see on a Audi A4 radio:

  • AUZ5Z4C5221241
  • AUZ1Z4K3201151
  • AUZ2Z7B1331142
  • AUZ2Z3B2314121
Audi radio label showing AUZ serial

How it works

Follow these steps to get an unlock code for your Audi A4 without leaving the car.

  1. 📸

    Collect the serial number

    Remove the radio or open the diagnostic menu to note the serial number (look for numbers such as AUZ5Z4C5221241, AUZ1Z4K3201151, AUZ2Z7B1331142, and AUZ2Z3B2314121). Clear photos help us validate it.

  2. 🧾

    Send the order to the Audi generator

    Use the button above to open the dedicated generator and submit the order form with accurate contact details.

  3. 🔓

    Receive and enter the code

    We confirm the exact turnaround once we verify the serial number. In most cases the unlock code is delivered instantly (ready in minutes) after payment, and we keep you posted if manual processing is required.

Recover unlock code

Audi A4 radio code FAQ

Where can I find the serial number on a Audi A4 radio?

Check the sticker on the side or top of the head unit, or open the service menu on the screen. Common serials for Audi A4 radios look like AUZ5Z4C5221241, AUZ1Z4K3201151, AUZ2Z7B1331142, and AUZ2Z3B2314121. Take a clear photo before placing the order so we can verify it.

How fast can you send the unlock code?

We confirm the exact turnaround once we verify the serial number. In most cases the unlock code is delivered instantly (ready in minutes) after payment, and we keep you posted if manual processing is required.

Will the code still work after a battery disconnect?

Yes. The PIN we deliver stays linked to your Audi A4 radio. You can reuse it whenever the battery is disconnected or the ECU is serviced.

What does a Audi A4 radio code look like?

Most factory stereos use a 4-digit numeric PIN, while premium navigation or amplified systems may require 5 digits or include letters. We highlight the expected format in the delivery email.

Thousands of Satisfied Customers

See what they say about our service.

Thanks so much for your help. In Spain, I was quoted 50 euros for the information I needed. With your service, I received my code in just a few minutes late on a Sunday. Highly recommend for the convenience and savings!

Brilliant service! It was super easy to use at a great price. I got my radio working in no time with the code provided.

Fast and efficient, I made the payment (which was very reasonable) and almost immediately received the code by email. Service was going to charge me $55 and required removing the radio. Thanks to this service, I saved time and money.

A seamless experience with exceptional customer support. The code worked flawlessly on the first try, saving me a trip to the dealer and a lot of money. The quick turnaround time for receiving the code was a game-changer for me.

Even though they couldn't resolve my issue directly, the immediate response and hassle-free refund process were very impressive. It's rare to find such honest and customer-focused service. Highly trustworthy.

Impressive service! Gave them my serial number and received the code in about 2 minutes, even late on a Saturday. This saved me not only money but also the time and hassle of dealing with service centers. Absolutely recommend!