Audi Side Assist Retrofit

Status:

This retrofit has been succesfully implemented and tested on mine A4 B9, and it’s still active.

100%

Needed parts:

  • Radars

    • 4M0 907 566 D Right rear radar [MASTER]
    • 4M0 907 590 D Left rear radar [SLAVE]
    • 8W0 907 175 Left radar bracket [sedan]
    • 8W0 907 176 Right radar bracket [sedan]
  • Exit warning LEDs

    • 8W0 947 356 B 2x Front Exit warning LED
    • 8W0 947 356 H 2x Rear Exit warning LED
    • 4B0 972 623 4x Exit warning LED connector
    • 1K0 972 923 2x Connector for rear doors ECU 
  • Connectors and pins

    • 1-968700-1 4x Splitter connector
    • N90764701 10x female pin connectors
  • Doors ECUs

    • Front passenger side 4M0 959 792 C
    • Front driver side 4M0 959 793 C
    • Back side 4M0 959 795 C
  • Diagnostic Interface

    • VAS with ODIS online for CP removal
    • VCDS

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]
  • write door module parameter (42 and 52 )  

 

42 Door Elect Driver

  • Byte 11 bit 4 = 1 [SWA]
  • write door module parameter (42 and 52 ) 

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.

Everything was working fine, except for the SWA \ warning LEDs in the side mirror caps.
As soon as i check the Byte 11 bit 4 = 1 [SWA] in the 52 or 42 front doors ecu modules, the “Side Assist malfunction” warning appears on the virtual cockpit, and there’s a fault code on the 52 and 42 modules:
196885 – Function Lightning for Lane Change Assistant LED Display
B1789 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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