Audi Side Assist Retrofit
Status:
This retrofit has been succesfully implemented and tested on mine A4 B9, and it’s still active.
Needed parts:
Price:
800 €
This retrofit will enable:
- Side Assist – Also known as SWA (Spurwechselassistent) or BSD (blind spot detection)
- Exit Warning – Uses visual warnings to alert the driver when other vehicles or cyclists are approaching from behind as the vehicle doors are opened
- Rear Cross traffic assist – Also known as RTCA, it monitors the area behind your vehicle and provide warnings of vehicles and other objects that are approaching
- Pre Sense rear – It will warn the driver if an imminent collision from behind is happening, it will close the windows \ sunroof, activate the emergency flash and tensor the seat belts if equipped.
1 – Mounting radars
Rear bumper must be removed
2 – Wiring radars
3 – Wiring front doors
4 – Wiring rear doors
5 – Component Protection removal
6 – Coding
03 ABS – Long Coding
- Byte 18 bit 3 = 1
- Byte 30 bit 4 = 1
With AutoHold:
- Byte 18 = DA [11011010]
- Byte 30 = 5B [01011011]
Without AutoHold
- Byte 18 = 9A [BIN 10011010]
- Byte 30 = 59 [BIN 01011001]
17 Instruments – Long Coding
- Byte 5 bit 3 = 1 [Lane change assistance]
5F Information Electronics – Adaptation
- SWA_0x1A ===> activated
- SWA_0x1A_msg_bus ===> Terminal 15
- [LO] _menu_display_lane_assistant ===> activated
- [LO] _menu_display_lane_assistant_over_threshold_high ===> activated
A5 Front camera – Long Coding
- Byte 11 bit 1 = 1 [SWA]
09 Central Electrics – Long Coding
- Byte 37 bit 0 = 1 [rtca_support_config]
52 Door Elect Pass
- Byte 11 bit 4 = 1 [SWA]
- Byte 11 bit 5 = 1 [Exit Warning]
42 Door Elect Driver
- Byte 11 bit 4 = 1 [SWA]
- Byte 11 bit 5 = 1 [Exit Warning]
BB – BC Rear doors
- Byte 11 bit 4 = 1 [SWA]
- Byte 11 bit 5 = 1 [Exit Warning]
7 – Notes
I purchased an aftermarket Audi Side Assist kit from Aliexpress and i had this issue with the Side Assist LEDs on the mirrors.
196885 – Function Lightning for Lane Change Assistant LED DisplayB1789 01 [009] – Electrical Failure
After some troubleshooting and advices, it turned out to be the aftermarket LEDs.
I purchased a couple of original ones (100€ for right and left one!) and it’s all working perfectly.
Note the differences between the chinese one, and the original one
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