100% Money Back Guarantee The World's Leading Car Radio Code Service Trusted by 1,000,000+ customers
English Español Español Deutsch Deutsch Italiano Italiano Français Français Português (Brasil) Português (Brasil) Română Română Български Български Slovenčina Slovenčina Nederlands Nederlands Svenska Svenska Magyar Magyar Hrvatski Hrvatski Norsk Norsk Suomi Suomi Dansk Dansk Polski Polski Čeština Čeština Ελληνικά Ελληνικά Русский Русский
Email
Audi Audi · Radio Codes
Est. 24 Hours

Audi A4 Radio Codes

Audi A4 radio code by serial number. Covers all Concert, Chorus, Symphony, and navigation units fitted across A4 B5, B6, B7, and B8. Enter your AUZ serial from the unit label.

Enter your serial number
Over 1 million codes delivered worldwide.
Not sure which serial to enter? See examples
Est. 24 Hours Money back guarantee Secure checkout
Excellent 4.5 stars 22,174 reviews on Trustpilot
Trustpilot 4.5 out of 5 stars on Trustpilot TrustScore  4.5 | 22,174 reviews

Step 1 of 3

How to find your Audi serial number

The guide below will show you exactly where to find your Audi radio serial number.

Remove the radio to find your serial
Audi Chorus / Concert
Remove the radio to find your serial
Insert the four radio release keys into the corner holes of the fascia and apply gentle outward pressure. The unit slides forward. You do not need to disconnect any wires.

The serial is on the label on the back of the casing, starts with AUZ, 14 characters (for example, AUZ2Z3C1420538).
Remove the radio to find your serial
Audi Symphony
Remove the radio to find your serial
Insert the four release keys into the corner holes and slide the unit forward. The serial is on the label on the back of the casing, starts with AUZ, 14 characters (for example, AUZ1Z4H7755256).
Find your serial on screen
Audi RNS-E Navigation
Find your serial on screen
You do not need to remove the unit. Power it on and look at the bottom of the display, the serial number appears along the bottom edge of the screen.

It starts with AUZ, is 14 characters long, and the sixth character is always 7 (for example, AUZBZ7H7145296).
What your Audi serial looks like
AUZ-Series AUZ1Z1F6412082
AUZ-Series AUZBZ7E0902434
Can't find it? Contact us. We'll help you locate your serial before you pay a penny.

Why choose us

The World's Leading Audi Radio Code Service

World's No.1
OnlineRadioCodes.co.uk is the world's leading supplier of car radio codes, with over 1 million codes delivered since 2015. Our radio experts are on hand to help you every day.
Instant delivery
Most codes appear on screen the moment payment clears. For brands that require manual lookup, our team typically delivers within the hour during business hours.
Money back guarantee
If your code does not work, we refund you in full. No questions, no hassle. We are one of very few radio code companies to back every order with a complete money back guarantee.
Lifetime retrieval
Misplace your code weeks or even years from now? Just get in touch and we will resend it free of charge, every time. One purchase gives you access for life.

FAQ

Frequently asked questions

Why is my Audi A4 radio asking for a code?
Power was cut to the unit, a flat battery or a battery change being the usual cause, and the anti-theft lock activated. Enter the correct code once and it will not ask again until the next time power is lost.
Which radios were fitted to the A4?
Mostly the Concert, Symphony and Chorus units, plus the RNS-E navigation on higher specs. All carry a 14-character AUZ serial and all are covered. The RNS-E can also show its serial on screen, which saves removing it. If you have another Audi, our main Audi radio code page lists every model we cover.
Where is the serial on an A4 radio?
On the label on the casing, a 14-character number starting AUZ. Slide the unit out with release keys to read it, no wires need to be disconnected. RNS-E owners can use the on-screen route instead.
How do I enter the code on an A4?
With the ignition on the display shows SAFE, then 1000. Set each digit with the preset buttons, then confirm. If the radio shows 2 SAFE it has had too many wrong attempts, leave it switched on for about an hour and it will accept entries again.
I have had the car years and never needed a code before. Why now?
The code only comes into play when the radio loses power. Many owners never see it until the first battery change. Nothing has gone wrong with the unit, it just needs its code once.

Verified · Trustpilot

Don't just take our word for it

See all reviews on Trustpilot
5 stars
5 hours ago Trustpilot

Great help!!

Great help getting the code for my radio within an hour of buying my car had the code sent straight to my email! Perfect thank you!!

Eddie Anderson · GB
4 stars
12 hours ago Trustpilot

Eventually worked perfectly

At first my code could not be found automatically, but when I telephoned to ask for help, the helpful person (Liz) who answered eventually managed to find th…

James Smith-Ross · GB
3 stars
16 hours ago Trustpilot

The radio code arrived promptly

The radio code arrived promptly. There were no issues.The 3 star rating is given because you "communicate" in "Brazilian" a dialect of Portuguese.In your sit…

Carlos Balbino · PT
5 stars
19 hours ago Trustpilot

Super

schnell, unkompliziertPreis Leistung okay

Martina Berner · DE · Ka
5 stars
1 day ago Trustpilot

Fast and easy

Fast and easy, ridiculously so tbh, I've got music again so I'm totally made up.

Robert · GB
5 stars
1 day ago Trustpilot

Sehr guter Kontakt nur zu empfehlen

Sehr guter Kontakt nur zu empfehlen.Schnelle Leistung

Dino Kovacs · DE
5 stars
1 day ago Trustpilot

Code arrived within 30 Mins

Code arrived within 30 Mins , Code was correct Radio works great.

KASEY · US
5 stars
1 day ago Trustpilot

I can’t recommend these guys enough

I can’t recommend these guys enough. Any problems I had they were eager to resolve resulting in the problem being solved. They went above and beyond and thei…

Nichola & Simon · GB
5 stars
1 day ago Trustpilot

Quick customer service

The initial code didn't work but within minutes of me emailing Mika sent another to try which was successful. V quick response, thanks you.

Caroline Olbert · GB · Ka
5 stars
1 day ago Trustpilot

Radio Fixed

The first code did not work, but when I reached out to these amazing people, they sent me another code for free, which worked immediately - thank you so much…

Seelan Reddy · IE
5 stars
1 day ago Trustpilot

Absolute fantastic company to deal with…

Absolute fantastic company to deal with 5 star service

ashling hussey · IE
See our 22,174 reviews on Trustpilot

Ready to unlock your Audi radio?

Enter your serial number above and get your unlock code in seconds.

Get my code now
Online Radio Codes is an independent radio code service and is not affiliated with, authorised by, or connected to Audi AG or any of its subsidiaries or affiliated companies. All manufacturer names, model names and trademarks are the property of their respective owners and are used solely for identification and reference purposes.
Get my radio code