CRUX SWRBM-57K

Radio Replacement with SWC Retention for Select BMW Vehicles with I/K-Line Bus (1991-2006)

Brand: CRUX Interfacing Solutions

Product Features

Retains factory features in select BMW vehicles with I/K-Line Bus while functioning with an aftermarket radio.
Does not support amplified systems with factory DSP.
EIA color coded wiring for easy installation.

Parts Included

SWRBM-57K MODULE: A compact electronic module.
SWC Cable: A cable with a 3.5mm plug on one end and a 4-pin connector on the other.
40-Pin Quadlock Harness: A wiring harness with a 40-pin connector.
17-Pin Slide-Lock Harness: A wiring harness with a 17-pin slide-lock connector.

Installation Diagram

The installation diagram illustrates the connection between an aftermarket radio, the SWRBM-57K module, and the vehicle's factory wiring harness. It provides a color-coded guide for essential connections:

Illumination (+): Orange wire
Power Antenna/Amp Turn on: Blue wire
+12V Constant: Yellow wire
+12V ACC: Red wire
Ground: Black wire
Speaker Outputs: Right Front (+/-) (Gray/Gray-Black), Left Front (+/-) (White/White-Black), Right Rear (+/-) (Violet/Violet-Black), Left Rear (+/-) (Green/Green-Black)

The diagram shows the SWRBM-57K module connecting to the vehicle's harness via either a 40-pin Quadlock connector or a 17-pin Slide-Lock connector, depending on the vehicle's OEM harness. It also details the connection of the 3.5mm SWC cable to the module. Instructions are given to cap or insulate any unused wires. A separate diagram shows the 3.5mm SWC cable connecting to the module and the vehicle's SWC input, with specific wire mapping: RED to SWC Key 1, WHITE to SWC Key 2, and SHIELD to SWC Ground. It notes that the shield connection is not needed if the radio only has SWC1 and SWC2 inputs. The diagram also indicates the "SWC SETTING" for the aftermarket radio and the "BMW SWC SETTING" on the module.

DIP Switch Settings

Aftermarket Radio DIP Switch Settings

RADIO BRAND	DIP: 1	2	3	4
Atoto, Dual, Farenheit, Jensen, Pioneer	OFF	OFF	ON	ON
Power Acoustik, Soundstream	OFF	OFF	ON	ON
Blaupunkt, Most off-brand Radios	OFF	OFF	ON	ON
Alpine	OFF	OFF	OFF	OFF
Clarion	OFF	ON	ON	OFF
Kenwood	OFF	ON	ON	ON
JVC	OFF	ON	OFF	ON
Boss, Old Sony	OFF	ON	OFF	OFF
New Sony	OFF	OFF	ON	OFF

Note: For certain radio brands (Atoto, Blaupunkt, Dual, Farenheit, Power Acoustik, Soundstream, and most off-brand radios), consult the aftermarket radio's manual for SWC button programming.

BMW Steering Wheel Control DIP Switch Setting

DIP:	5	6	7	8
BMW	OFF	OFF	OFF	OFF

3.5mm SWC Cable Connection

Plug the 3.5mm SWC cable into the 4-pin port on the SWRBM-57K module. If the Blue/Yellow wire or the 3.5mm plug is not being used, insulate it.

For aftermarket radios with separate SWC wires, cut off the 3.5mm plug from the CRUX SWC Cable. Connect the wires as follows:

RED wire to SWC Key 1
WHITE wire to SWC Key 2
SHIELD to SWC Ground

Note: If the radio only has SWC1 and SWC2 inputs, the shield connection is not required.

Vehicle Applications

Type A: 17-PIN SLIDE-LOCK CONNECTOR APPLICATIONS (I-Bus Slide-Lock 17 Pin Round Connector)

1990-1998 3 Series (E36)
1998-2005 3 Series (E46) Sedan/Wagon
1998-2006 3 Series (E46) Coupe/Convertible
1995-2000 5 Series (E39)
1990-1998 7 Series (E38)
2004-2006 X3
2000-2001 X5
1996-2002 Z3
2001-2002 Z8
1999-2002 M
1999-2002 M

Type B: 40-PIN QUAD-LOCK CONNECTOR APPLICATIONS (I-Bus QuadLock 40 Pin Connector)

2001-2004 Compact (E46)
2001-2003 5 Series (E39)
1994-2001 7 Series (E38)
2004-2007 X3
2002-2006 X5
2003-2008 Z4
2001-2005 Mini

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