Audi A4 / S4 / RS4 1999 Unlock Code⚡

B5 | Instant Retrieval | 24/7 Service

Audi A4 / S4 / RS4 1999 car photo
Dealer price $120 92% Off!
Our price: only $9.99
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100% Money-back guarantee if the code doesn't work

Your code becomes available within seconds after finishing your purchase and is emailed to your email also. We're available always.

Incorrect code? You're protected by our 100% Money-Back Guarantee. Simply send us a video that shows both 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 1999
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!
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How to get your Audi A4 / S4 / RS4 1999 radio code?

1. Find the serial number on your radio. Press preset buttons 1 & 6 for 2-3 seconds. Serial number will appear on screen. No VIN required!

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 1999 Audi A4 / S4 / RS4 (B5)

Your 1999 Audi A4 / S4 / RS4 (B5) came equipped with original equipment radios that require unlock codes when battery is replaced. Our service provides rapid radio code retrieval for every 1999 Audi A4 / S4 / RS4 variants.

Common Reasons for Radio Lock:

  • Battery disconnection or removal
  • Wiring work in your 1999 A4 / S4 / RS4
  • Radio replacement
  • Fuse replacement
  • Jump-starting after battery died
  • Purchased used car 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 1999 Audi A4 / S4 / RS4 trim levels and radio variants.