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What year is your X5 ? What system the Business Radio or Screen with Nav?

First is to check with a meter if you have output at the speakers themselves. If there is output then the speakers are probably at fault (you have checked left right balance settings?)

If there is no output then it could be the radio module BM24 or newer BM54 there are several companies who now repair and upgrade the radio units.

This may help with checking connections and wiring.

X5 Radio Module and Amp Information

2002 and newer Radio Module - w/Nav

Pin No. / Wire Color / Function

Large Black Plug x18126

1 / Blue-Black / Right Rear + output to amp (twisted with 5)

2 / Blue-Red / Right Front + output to amp (twisted with 6)

3 / Yellow-Red / Left Front + output to amp (twisted with 7)

4 / Yellow-Black / Left Rear + output to amp (twisted with 8)

5 / Blue-Black / Right Rear + output to amp (twisted with 1)

6 / Blue-Red / Right Front + output to amp (twisted with 2)

7 / Yellow-Red / Left Front + output to amp (twisted with 3)

8 / Yellow-Black / Left Rear + output to amp (twisted with 4)

9 / White-Yellow bands / I-bus?

10 / White-Brown / Mute from phone?

11 /

White-Green

/ ?

12 / Brown / Ground

13 / White / Remote on-off to amp

14 / Grey-Red / Dash illumination (dimmer)

15 / Red-Green / +12v from battery (not switched)

16 / Violet-White / +12v from ignition (ACC and RUN)

small white plug x13598

Pin No. / Wire Color / Function

1 / / No function

2 / White-Brown / Audio common from 6CD player

3-7 / / No connection

8 / White-Red / Audio Left Channel from 6CD player

9 / White-Blue / Audio Right Channel from 6CD player

10 / / No Connection

11 / NAV / TV Audio +

12 / NAV / TV Audio -

NEW Small black plug: x13649 plug

Pin No. / Wire Color / Function

1 / Tape left +

2 / Tape left -

3 / Left Connection for AUX Input

4 / Right Connection for AUX Input

5 / NAV / TV Audio +

6 / White-Black / Phone audio + Positive

7 / Tape right +

8 / Tape right -

9 / No connection

10 / AUX Input Ground

11 / NAV / TV Audio +

12 / Brown-Black / Phone Audio - Groundv

2000 - 2001 Radio Module - w/Nav

Pin No. / Function

1 /

Speaker - Front Left

(+)

2 / Speaker - Front Right (+)

3 / Speaker - Rear Left (+)

4 / Telephone Mute

5 / +12v from ignition (ACC and RUN)

6 / Speaker - Rear Right (+)

7 / DAC - i-bus

8 / Speaker - Front Left (-)

9 / Back Up (?) (terminal 30 - Fuse F56)

10 / GAL - speed signal

11 / Speaker Front Right (-)

12 / Speaker Rear Left (-)

13 / Nighttime Illumination Signal

14 / Speaker Rear Right (-)

15 / Ground

16 /

Auto Antenna

- diversity

17 / Not Used (LAC)

x18805:

Pin No. / Function

1 / Audio Cassette Right (+)

2 / Audio Cassette Right (-)

3-4 / No connection

5 / Low Frequency Signal (-) - Nav Control Module / Video Module

6 / Audio Cassette Left (+)

7 / Audio Cassette Left (-)

8-9 / No Connection

10 / Low Frequency Signal (+) - Nav Control Module / Video Module

x01037

Pin No. / Function

1 / Low Frequency Voltage Signal

CD Changer

Left

2 / Low Frequency Voltage Signal CD Changer Right

3 / Shield - audio shield

4-5 / No Connection

6 / Low Frequency Voltage Signal CD Changer Left

7 / Low Frequency Voltage Signal CD Changer Right

8-10 / No Connection

The following link is diagram of the X5 hi-fi amplifier (non-DSP). You will need the

Adobe SVG plug-in

to view it.

http://www.bmwmotorsports.org/crew/u...0000014774.svg

Or you can piece together these three images:

Image 1

Image 2

Image 3

In case you are not familiar with the German colors

BR brown

GE yellow

GN green

OR orange

VI violet

GR grey

SW black

WS white

RT red

BL blue

TR transparent

In the diagram the module N9 is the radio (or the Business CD unit), H55 is the left front midrange speaker, and H54 is the right right front midrange speaker, both being on top of the dash.

Signals TLH+/- are for the rear left woofer

Signals MTHL+/- are for the midrange speaker/tweeter, rear left

Signals TLV+/- are for the front left woofer

Signals HLV+/- are for the front left tweeter

Signals HRV+/- are for the front right tweeter

Signals TRV+/- are for the front right woofer

Signals MTHR+/- are for the midrange speaker/tweeter, rear right Signals TRH+/- are for the rear

right woofer