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Axxess AX-BM9112 Wiring Interface

Connect a new car stereo and retain the factory amp and steering wheel controls in select 2002-08 MINI Cooper vehicles with Harman Kardon

Item # 120BM9112

Find what Fits your vehicle

Item # 120BM9112

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On backorder

About the Axxess AX-BM9112 Wiring Interface

Axxess AX-BM9112 

You want to upgrade the stereo in your 2002-08 MINI Cooper, but you don't want to lose important factory features. Axxess' AX-BM9112 interface retains the steering wheel audio controls, along with your MINI's Harman Kardon amplifier. It also retains your phone buttons (when compatible with your new radio) and your date, time, and temperature display, along with your retained accessory power (R.A.P.) feature.

Product highlights:

  • retains steering wheel audio controls and factory amplifier
  • retains 12-volt accessory output, retained accessory power (R.A.P.), phone buttons, and date, time, and temperature display
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # AX-BM9112

What's in the box:

  • Radio replacement interface module
  • Steering wheel control interface module (ASWC-1)
  • Radio replacement interface harness
  • Steering wheel control harness
  • LD-SWC-F3.5 harness
  • Installation Instructions

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Axxess AX-BM9112 Wiring Interface reviews

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Crutchfield response

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More details on the Axxess AX-BM9112 Wiring Interface

Stacey B.

Product Research


Vehicle Compatibility: The AX-BM9112 radio replacement interface module from Axxess Integrate allows you to replace the factory radio in a 2001-2006 Mini Cooper Hatchback and 2005-2008 Mini Cooper Convertible featuring a stock Harman Kardon amplifier with an aftermarket head unit while retaining important factory features.

Retained Factory Features: The Axxess Integrate AX-BM9112 retains the following OEM features in your vehicle after you have replaced your factory radio with an aftermarket head unit.

  • Factory Amplifier & Audio Level Adjustments: The Axxess Integrate AX-BM9112 retains the vehicle's factory Harman Kardon amplifier. It also retains factory audio level adjustments such as Front & Balance Control, Driver Mode, and Preset EQ (Normal/Spatial/Electronics/Instrument/Festival). These factory audio level adjustments are done through the vehicle's steering wheel controls (if equipped) or through the included  momentary switch).
  • Steering Wheel Controls: If your aftermarket head unit is steering wheel control ready, the included ASWC-1 steering wheel control interface module and harness allow you to retain your vehicle's factory steering wheel controls. *The supplied momentary switch will be used in vehicles that are not equipped with steering wheel controls.
  • Factory Display: The AX-BM9112 also retains factory display of date, time, and temperature.
  • R.A.P. (Retained Accessory Power): The AX-BM9112 retains the R.A.P. function in your vehicle. R.A.P. (Retained Accessory Power) supplies power to the radio after the ignition is shut off until one of the front doors are opened.
  • Warning Chimes: In addition, the AX-BM9112 will retain factory warning chimes when present in the vehicle.

Outputs: The Axxess Integrate AX-BM9112 provides a 12V/10A accessory output and an illumination output to make installation easier and less time consuming.

  • Accessory (12V/10A): Because there is no 12-volt accessory wire in the factory harness of your vehicle, the AX-BM9112 provides a 12-volt, 10-amp switched accessory output. This prevents you from having to run an accessory wire to the fuse box or underneath the steering column when installing your aftermarket stereo.
  • Illumination Output: The AX-BM9112 also has an illumination output if your new aftermarket head unit has an illumination wire.

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Customer Q&A

3 questions already asked

I do not have steering wheel controls do i still need this adapter?
[ Richard  Apr 30, 2020 ]
2 answers
Yes. That still handles all the other essential power, ground, and signal connections.
[ Cosmo  May 24, 2020 ]  Staff
You'll need the adapter if your Mini Cooper has the HK sound system.
[ Tony  May 13, 2020 ]
I have a 04 Mini Cooper with the HK system and am trying to put in a kenwood head unit with the axxess ax-bm9112 wiring interface. When I program it, it seems to get the steering controls working but I'm not getting sound. Or at least very very low sound when fully cranked up. I know the HK system runs a different impedance than the kenwood head unit but thought this harness was supposed to make it work with the factory HK system. Is this not the case or am I am just making a mistake somewhere?
[ Tylor  Sep 15, 2019 ]
2 answers
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Krissy  Sep 24, 2019 ]  Staff
One of the wires, I think blue/yelllow (antenna) does have to be hooked up for the HK amp. Contact Crutchfield as they helped me quickly.
[ Antonio  Sep 16, 2019 ]

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