Many modules are locked and require a security access code. Here are the most common ones for the MQB-based Audi A3 8V:
Permanently disables the automatic engine shutdown feature when stopping at traffic lights. 19 (Gateway)
Leuchte12NL LB45 → Lichtfunktion G 12 → Coming Home oder Leaving Home aktiv Dimmwert AB 12 → 100
: Allows for manually resetting maintenance intervals without needing to visit a dealership. Hardware Requirements Higher Trims (1.8/2.0 Models)
Note: Reset your MMI factory light settings afterward to apply. Fog Lights as Cornering Lights
| Feature | Coding | Bit / Byte | |--------|--------|------------| | | Byte 1, Bit 3 | 1 | | Compass display | Byte 4, Bit 2 | 1 | | Oil temperature | Byte 10, Bit 1 | 1 | | Navigation display (if nav present) | Byte 3, Bit 2 | 1 | | Seat belt warning off | Byte 0, Bit 4 | 0 (or adapt Seat belt warning to None ) |
If an Audi dealership performs a factory software update on your car during routine maintenance, they will likely overwrite your changes back to the factory spec. Keep this cheat sheet handy to re-apply your favorite configurations! If you want to refine your vehicle setup, tell me: What diagnostic tool are you using? (VCDS, OBDeleven, etc.) What model year is your A3 8V? Are there specific errors you are trying to resolve?
Change Spiegelabsenkung bei Rueckwaertsfahrt (Mirror lowering in reverse) to
ENG125906-ENG125920 – Display fuel consumption → corrected (adjust for larger tanks) ENG125906-ENG125923 – Display configuration → oil temperature → active
Unlocks the hidden track lap timer and integrates a live digital oil temperature reading in the multi-function display. Select Go to Coding - 07 -> Long Coding Helper Select Byte 1 Enable Bit 3 (Lap Timer active) Save/Apply. Seat Belt Warning Deactivation
Many modules are locked and require a security access code. Here are the most common ones for the MQB-based Audi A3 8V:
Permanently disables the automatic engine shutdown feature when stopping at traffic lights. 19 (Gateway)
Leuchte12NL LB45 → Lichtfunktion G 12 → Coming Home oder Leaving Home aktiv Dimmwert AB 12 → 100
: Allows for manually resetting maintenance intervals without needing to visit a dealership. Hardware Requirements Higher Trims (1.8/2.0 Models)
Note: Reset your MMI factory light settings afterward to apply. Fog Lights as Cornering Lights
| Feature | Coding | Bit / Byte | |--------|--------|------------| | | Byte 1, Bit 3 | 1 | | Compass display | Byte 4, Bit 2 | 1 | | Oil temperature | Byte 10, Bit 1 | 1 | | Navigation display (if nav present) | Byte 3, Bit 2 | 1 | | Seat belt warning off | Byte 0, Bit 4 | 0 (or adapt Seat belt warning to None ) |
If an Audi dealership performs a factory software update on your car during routine maintenance, they will likely overwrite your changes back to the factory spec. Keep this cheat sheet handy to re-apply your favorite configurations! If you want to refine your vehicle setup, tell me: What diagnostic tool are you using? (VCDS, OBDeleven, etc.) What model year is your A3 8V? Are there specific errors you are trying to resolve?
Change Spiegelabsenkung bei Rueckwaertsfahrt (Mirror lowering in reverse) to
ENG125906-ENG125920 – Display fuel consumption → corrected (adjust for larger tanks) ENG125906-ENG125923 – Display configuration → oil temperature → active
Unlocks the hidden track lap timer and integrates a live digital oil temperature reading in the multi-function display. Select Go to Coding - 07 -> Long Coding Helper Select Byte 1 Enable Bit 3 (Lap Timer active) Save/Apply. Seat Belt Warning Deactivation
