Audi A4 B9 Coding List Fix Jun 2026
Make windows, mirrors, and locks work the way you want.
Below is a comprehensive list of the most popular Audi A4 B9 coding modifications, categorized by function.
5F – Information Control Unit Adaptation: [5F] → Adaptation → "Speed lock" → "Speed lock at standstill" → Not active Also need to adjust region coding sometimes: Byte 24 → Bit 4 uncheck audi a4 b9 coding list
09 – Central Electrics Coding: [09] → Security Access (31347) → Adaptation → "Leuchte26" → "Light function D" → Set to "Daytime running lights"
Before we jump into the list, it is important to understand what coding actually is. Make windows, mirrors, and locks work the way you want
Coding is the process of changing the software configuration of a specific control module (ECU) within the car. Unlike "chipping" or "tuning," which alters engine performance parameters to increase horsepower, coding changes settings . It is akin to toggling a switch in a computer's BIOS or changing a setting in Windows Registry.
09 – Central Electrics Adaptation: [09] → Adaptation → "Ambient lighting" → Set to "Installed" [09] → Adaptation → "Interior light, light configuration" → Configure RGB channels if available Coding is the process of changing the software
: Causes the speedometer and tachometer needles to sweep to their maximum and back upon startup—a feature typically reserved for S and RS models.
: Micro-adjusts the temperature or fan speed for specific seating stages. Lighting & Visual Customizations Scandinavian DRLs
| Feature | Module | Security Code | Instructions | Result | | :--- | :--- | :--- | :--- | :--- | | | 09 – Central Elect. | 31347 | Adaptation -> (4)-Comfort illumination-Coming Home Leuchten -> Change to "Fog light" | Your fogs turn on at night when you unlock the car, saving your Xenon/LED bulbs. | | Increase Ambient Lighting Brightness | 09 – Central Elect. | 31347 | Adaptation -> (2)-Ambientelicht Farbliste HMI -> Change values from 100 to 150 (max) | Makes the door panel and footwell LEDs significantly brighter. | | Activate Rear Fog Light on Single Side (Euro Style) | 09 – Central Elect. | 31347 | Adaptation -> (6)-Leuchte26NSL LB72-Lichtfunktion A 26 -> Change to "Nebelschlusslicht wenn kein Anhaenger betrieben" | Useful in heavy fog; keeps other drivers from mistaking your lights for brake lights. | | Disable Seatbelt Warning Chime | 17 – Instruments | 20103 | Adaptation -> (12)-Seat belt warning-Seat belt warning -> Change to "Not activated" | Silences the annoying ding (not recommended for public roads, but useful for track days). | | Adaptive Light via Fog Lights (Static cornering) | 09 – Central Elect. | 31347 | Adaptation -> (5)-Static AFS light-Speed threshold for static AFS light -> Change from 40 km/h to 0 km/h | Makes the fog light on the turning side illuminate even at very low speeds (parking lots). |