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 22,220 reviews on Trustpilot
Trustpilot 4.5 out of 5 stars on Trustpilot TrustScore  4.5 | 22,220 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
4 hours ago Trustpilot

It was great i miss spellt the serial…

It was great i miss spellt the serial number and they still got me the right code

Swaggcorn · RO
5 stars
4 hours ago Trustpilot

Fantastic service and fast response

Fantastic service and fast responseI even made a mistake an gave the wrong serial number and they helped me with a brand new codeWould definitely use this se…

Dan Cabby · GB
5 stars
7 hours ago Trustpilot

I was sceptical - however it does work!

I have to be honest, I was sceptical this would work. My daughter’s car radio hasn’t worked for years since the battery was changed. The service was very eas…

A R · GB
5 stars
8 hours ago Trustpilot

Bin sehr zufrieden

Ging alles sehr sehr schnell, paar Minuten und der Code war da. Bin sehr sehr zufrieden mit der blitzschnellen Rückkehr. 23€ sind auch ein Fairer Preis.Empfe…

Ahmet · DE · VW
5 stars
9 hours ago Trustpilot

Hätte nie gedacht das das so super…

Hätte nie gedacht das das so super klappt mit dem Code. Einwandfrei, gebe meine Empfehlung weiter :)

Sebastian · DE
5 stars
14 hours ago Trustpilot

Muy buen servicio recomendado…

Muy buen servicio recomendado ampliamente está aplicación el código jalo perfecto en corto tiempo lo resolvieron gracias

Heriberto Ibarra · MX
5 stars
21 hours ago Trustpilot

Helped me with my Nissan radio

Helped me with my Nissan radio. Thank you so much guys!

Alex E · NL · Nissan
5 stars
23 hours ago Trustpilot

Ravie

Ravie ! Le concessionnaire me demandais 55 euros pour me trouver ce code.Bravo

Céline Milardi · FR
5 stars
1 day ago Trustpilot

It took a little more than 30 min but…

It took a little more than 30 min but everything worked out perfectly. I will definitely use there services again

Jason Houston · US
5 stars
1 day ago Trustpilot

Trés fiable est réponde rapidement aux…

Trés fiable est réponde rapidement aux mails. Je recommande

Remy Zarb · FR
See our 22,220 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