Audi A4 / S4 / RS4 2003 Unlock Code⚡

B6 | Instant Retrieval | 24/7 Service

Audi A4 / S4 / RS4 2003 car photo
Dealer price $120 92% Off!
Our price: only $9.99
Secure
Payment
Instant
Delivery
15,000+ Orders
See reviews (229) →
100% Money-back guarantee if the code doesn't work

Your code shows up within seconds after finishing your purchase and is transmitted to your email as well. We're available always.

Incorrect code? You're protected by our Complete Satisfaction Guarantee. Just send us a video that shows the combination of the code entry and serial number together. No questions asked.

View our complete Refund Policy.

Once you have your code:
1. Turn on your Audi A4 / S4 / RS4 2003
2. Your radio will display "Enter Code" or "CODE"
3. Use preset buttons to enter each digit
4. Press and hold button 6 to confirm
5. Your radio unlocks immediately!
Audi Logo

How to get your Audi A4 / S4 / RS4 2003 radio code?

1. Find the serial number on your radio. Press preset buttons 1 & 6 for a few seconds. Serial number will appear on screen. VIN not needed!

2. Enter your serial number in the field on the left

3. Proceed to checkout to instantly receive your unlock code

Compatible Radio Types:

  • Audi OEM
  • Blaupunkt
  • Siemens

Serial Number Patterns:

Your radio serial may start with: AUZ, BP

Serial Number Examples:

AUZBZ7A1234567 (AUZ)

About 2003 Audi A4 / S4 / RS4 (B6)

The 2003 Audi A4 / S4 / RS4 (B6) came equipped with original equipment radios that need unlock codes when battery is replaced. Our service provides immediate radio code retrieval for every 2003 Audi A4 / S4 / RS4 trim levels.

Common Reasons for Radio Lock:

  • Battery disconnection or removal
  • Wiring work in your 2003 A4 / S4 / RS4
  • Radio replacement
  • Fuse replacement
  • Boosting after battery died
  • Purchased second-hand vehicle without code card

Why Our Service is Better:

⚡ Instant vs Days of Waiting
Dealer: 2-5 business days
Our service: Seconds

💰 $9.99 vs $120+ Dealer Price
Dealer: $120-$200
Our service: $9.99

No VIN required - just your radio serial number! Works for all 2003 Audi A4 / S4 / RS4 trim levels and radio variants.