Attention:

You only need the telephone adapter if you want to use the BlueBus to make and receive phone calls over Bluetooth. Further, you only need ONE adapter per vehicle.

Over the years, BMW changed the telephony system available in I-Bus cars. As such, there are three distinct BlueBus Telephone Mode harness adapters. Please use the guide below to figure out which version you need. Please ensure you have the appropriate connectors by checking the driver-side trunk electronics box of your vehicle.

The table below is a quick reference. Please scroll down for images, etc.

North American Market

Chassis Years Adapter Notes
E38 1999 or Earlier DB25 Verify a "phone" button on the steering wheel
E38 2000 - 2001 SES Verify a "Talking head" button on the steering wheel
E39 1999 or Earlier DB25 Verify a "phone" button on the steering wheel
E39 2000 - 2002 SES Connector may be hidden with zip ties in the harness.
E39 2003 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter.
E46 2000 or earlier 26-pin Black connector (non-SES) Contact Ted (support@bluebus.dev) for more information on this.
E46 Coupe 2001-2002 SES May also be equipped with 26-pin black connector. Ensure customer has the Blue SES connector in the trunk
E46 Coupe 2003-2004 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter.
E46 Convertible 2001-2004 54-pin The rear seat must be removed to expose the connector, unless the car came with an OE TCU.
E46 2005-2006 54-pin
E53 1999 - 2003 SES
E53 2004 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter.
E53 2005-2006 54-pin
E83 2003-2010 54-pin
E85/E86 2002-2005 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter.
E85/E86 2006-2008 54-pin

European Market

IMPORTANT: Most European Vehicles were NOT pre-wired for telephony

Chassis Years Adapter Notes
E38 1999 or Earlier DB25 Verify a "phone" button on the steering wheel
E38 2000 - 2001 SES Verify a "Talking head" button on the steering wheel
E39 1999 or Earlier DB25 Verify a "phone" button on the steering wheel
E39 2000 - 2002 DB25 or SES Connector may be hidden with zip ties in the harness. Verify the SES connector has a "cap" (SES Jumper ES#200433), or is missing before using the DB25 adapter.
E39 2003 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter. For 54-pin, Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E46 2000 or earlier DB25
E46 Coupe 2001-2002 SES May also be equipped with 26-pin black connector. Ensure customer has the Blue SES connector in the trunk
E46 Coupe 2003-2004 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter. For 54-pin, Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E46 Convertible 2001-2004 54-pin The rear seat must be removed to expose the connector, unless the car came with an OE TCU. For 54-pin, Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E46 2005-2006 54-pin Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E53 1999 - 2003 DB25 or SES Connector may be hidden with zip ties in the harness. Verify the SES connector has a "cap" (SES Jumper ES#200433), or is missing before using the DB25 adapter.
E53 2004 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter. For 54-pin, Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E53 2005-2006 54-pin Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E83 2003-2010 54-pin Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E85/E86 2002-2005 SES or 54-pin Verify the SES connector has a "cap" (SES Jumper ES#200433) before using the 54-pin adapter. For 54-pin, Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.
E85/E86 2006-2008 54-pin Verify if vehicle was pre-wired for Siemens TCU as pin-out is different.

E46

Build Date prior to 03/2002


You will have a black and a blue 26-pin connector if you're pre-wired for the telephone. Please ALWAYS order the SES adapter (blue 26-pin pictured below). SES Connector Jumpered

Build Date AFTER to 03/2002


If your E46 was pre-wired for telephone, then you will ALWAYS have the 54-pin version of the adapter.
However, certain cars built prior to mid-2004 may have come equipped with the SES connector. Please check your trunk!
If your SES connector looks like the one pictured below, then you should just buy the 54-pin connector adapter. Otherwise, if it does not have the "cap" on it, or if it's in use by an SES, then you MUST purchase the SES connector adapter.
SES Connector Jumpered
This is the 54-pin TCU connector, which can be found in the trunk electronics box:
54 pin Connector

E83 / Z4


If you have an E83 / Z4 and if your car was pre-wired for Telephony, you will ALWAYS have the 54-pin version of the adapter.
However, certain cars built prior to mid-2004 may have come equipped with the SES connector. Please check your trunk!
If your SES connector looks like the one pictured below, then you should just buy the 54-pin connector adapter. Otherwise, if it does not have the "cap" on it, or if it's in use by an SES, then you MUST purchase the SES connector adapter.
SES Connector Jumpered
This is the 54-pin TCU connector, which can be found in the trunk electronics box:
54 pin Connector

E38 / E39 / E53


SES / Voice Control Equipped or Pre-Wired Pre-2002

If you have the SES or the pre-wiring for it (pictured below -- blue connector with 26 pins), then you should purchase the SES Adapter. The SES connector is responsible for creating continuity in the six signals that the BlueBus requires, thus when it is not connected, there is no continuity from the TCU connector to the Radio, Amplifier and microphone.
Warning: If you have the SES / Voice Module (Option: S620/S620A) ensure that you remove the module! Failure to do so could result in damage to the BlueBus!
This is the SES connector, which can be found in the trunk electronics box:
SES Connector

Pre-2002 without SES or SES connector

Your car will likely be equipped with the TCU connector pictured below. It is similar to an older-style printer cable. Select "DB25-style connector".
This is the DB25 connector, which can be found in the trunk electronics box:
SES Connector

2002+

Your car will be equipped with the 54 pin connector, if your car was pre-wired for Telephony. This is the "next generation" TCU/ULF connector.
You may also have the SES connector in the trunk, either disconnected, connected to a module, or "capped" off.
If your SES connector looks like the one pictured below, then you should just buy the 54-pin connector adapter. Otherwise, if it does not have the "cap" on it, or if it's in use by an SES, then you MUST purchase the SES connector adapter.
SES Connector Jumpered
This is the 54-pin TCU connector, which can be found in the trunk electronics box:
54 pin Connector

Microphone


I highly recommend the OE microphones with these part numbers: 84318380338, 84318380319 and 84316938762.

Questions?


If you have any questions, please email me at support@bluebus.dev