Web Special $15 OFF USB3, MST4, BT3 Car Bluetooth Android iPhone kits Code: JAN2019, until Feb. 5


GROM-MST4 Android iPhone for BMW Optical Fiber, Bluetooth optional

USB / iPod / Android / Bluetooth Interface Box

USB / iPod / Android / Bluetooth Interface Box

USB port accepting any USB stick/drive

iPhone and Android phone integration via USB

MP3, M4A, OGG, FLAC, AAC, WAV music supported

Control from car stereo or steering wheel

Bluetooth Streaming and Handsfree Dongle

Bluetooth Streaming and Handsfree Dongle


Hands Free (HFP): accept & reject phone calls

Voice dial where applicable

Bluetooth Audio streaming (A2DP)

Integrated controls (AVRCP)

Distinctive functionality

Distinctive functionality

Add 3.5mm phone jack (sold separately)

Add HD Radio Tuner (sold separately)

Track information and text on select radios

  • Availability

    In Stock

  • Starter kit

    $289.99 USD

  • Price as configured


Enter your car model and year:

*Important Installation Notes: Please check that the CD MP3 Changer function is activated on your factory stereo. If it is not activated - you will need to contact dealer and ask to activate the CD changer function. Factory CD will have to be disabled to use GROM-MST4.

USB Connection: GROM-MST4 car stereo adapter connects your USB 2.0 device such as flash drive, external hard drive or mass storage device to the stock stereo in your car. You can control the playback through your car stereo or steering wheel controls.

Android car integration via USB port: Play music, control from car stereo or steering wheel controls, charge. Supports advanced control and browsing by folders/playlists.
Requires Dashlinq Android Car Assistant App (free for GROM users), available at Google Play Store For more information go to Dashlinq page
USB streaming for select Android devices is available without Dashlinq App. You can stream the music and use track up and track down controls from any music application, while connected via USB. Check your device specs to make sure it supports USB streaming.

iPhone / iPod/ iPad USB car integration: Connect your Apple device to the factory car stereo via USB port. Play music, control from car stereo or steering wheel, and charge at the same time. Use standard USB to Apple Lightning connector cable. All iPod Touch, iPhone, iPad with Lightning style cable are compatible. iPhone, iTouch, and iPad with 30-pin style cable are compatible. (iPod video, iPod photo, iPod classic, iPod shuffle, iPod mini with 30-pin connectors are not compatible.)

Bluetooth add-on (sold separately): Make a hands free phone calls (HFP), stream music from your phone to the factory stereo via Bluetooth Audio playback (A2DP), control your music with the car stereo or steering wheel controls via Bluetooth wireless audio control (AVRCP) with the GROM Bluetooth Dongle

HD Radio Tuner add-on (sold separately): Get HD FM Radio stations from your factory stereo. GROM-HDR1 HD Radio tuner improves the sound quality of local FM stations and delivers clear and bold sound. Adds access to the HD FM sub-stations for more music choices. Check out the HD Radio Tuner and Antenna Dongle

Aux 3.5mm phone jack connection for any additional audio source such as DVD, MP3 player, XM and more. Available with plus 5V charging option via AUX-In 3.5mm and 5V USB charging cable

Connection Diagram:
USB iPhone and Android Car Kit for fiber-optic Audi Mercedes, Volvo, BMW, Bluetooth Hands Free Kit, iPhone Car Adapter

Folder, playlists browsing is supported for iDrive BMW stereos.
Usage Video:

Install Video:

BMW 3 series Sedan, Vagon 2006-2006 (Must have MP3 CDC capability)
BMW 3 series 2007-2010 (Must have MP3 CDC capability)
BMW 5 series 2005-2010 (Must have MP3 CDC capability)
BMW M3 2007-2010 (Must have MP3 CDC capability)
BMW M5 2004-2010 (Must have MP3 CDC capability)
BMW X5 2007-2010 (Must have MP3 CDC capability)
BMW X6 2008-2014 (Must have MP3 CDC capability)
BMW Z4 2009-2010 (Must have MP3 CDC capability)
Mini Cooper R56 2006-2013 (Must have MP3 CDC capability, only Silver CD Drive compatible)
- GROM-MST4 Multimedia Box
- Optical harness
- Automotive grade USB Type A Male / Type A Female 3FT cable
- Install and Operation Manuals

Optional Add-Ons (sold separately):
- GROM Bluetooth Dongle for hands free calling and wireless playback
- AUX 3.5mm phone jack cable for any MP3 player, mobile phone, XM, etc.

Most orders are shipped on the next business day. Domestic Express orders are shipped within next day, if the order is placed before 1:00PM PST. International orders are shipped on the next business day.
For rates and delivery times please see this shipping rates chart