{"product_id":"aerpro-swbm9c-swc-interface-bmw-amplified-excluding-harman-kardon","title":"Aerpro SWBM9C SWC Interface BMW Amplified Systems Excluding Harman Kardon","description":"\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003e\u003cstrong\u003eAerpro SWBM9C Steering Wheel Control Interface for BMW with Business Head Units and OEM Amplified Systems Excludes Harman Kardon\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe Aerpro SWBM9C is an analogue steering wheel control (SWC) interface engineered for BMW vehicles fitted with Business head units and OEM amplified audio systems, excluding those with Harman Kardon amplification. It retains factory steering wheel controls, the OEM amplified audio system and provides an amplifier remote output after an aftermarket head unit is installed. Phone button functionality is supported with compatible Bluetooth head units. Not suitable for BMW vehicles with factory Harman Kardon amplifiers that feature DSP options in the radio menu and factory subwoofers.\u003c\/p\u003e\n \u003ch3 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eProduct overview\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eMany BMW models use an OEM amplified audio system where the factory amplifier must remain active after a head unit replacement to preserve audio output through the existing speakers. The SWBM9C retains this OEM amplified system (excluding Harman Kardon), eliminating the need for a separate amplifier retention module in compatible BMW Business head unit vehicles. An amplifier remote output (blue wire) is also provided for connecting the aftermarket head unit's amplifier remote trigger.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe analogue interface uses a vehicle-specific plug that connects directly into the existing BMW wiring without cutting or modifying the factory loom. Phone button functionality is retained when connected to a compatible aftermarket Bluetooth head unit. Voice assistant button support is not available. The Harman Kardon exclusion is critical the SWBM9C is not compatible with BMW vehicles fitted with Harman Kardon amplifiers that have DSP options in the radio menu and factory subwoofers. Use the Aerpro Vehicle Selector to confirm compatibility for your specific BMW model before purchasing.\u003c\/p\u003e\n \u003ch3 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eFeatures and benefits\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eOEM amplified system retention (excludes Harman Kardon):\u003c\/strong\u003e Retains the factory BMW amplified audio system after head unit replacement, eliminating the need for a separate amplifier retention module in compatible Business head unit vehicles.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eAmplifier remote output (blue wire):\u003c\/strong\u003e Provides an amplifier remote trigger output for the aftermarket head unit.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eRetains factory steering wheel controls:\u003c\/strong\u003e Allows the factory steering wheel audio controls to function with an aftermarket head unit, keeping hands on the wheel and eyes on the road.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003ePhone button support with compatible Bluetooth head units:\u003c\/strong\u003e Phone button functionality is retained when connected to a compatible aftermarket Bluetooth head unit.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eNot compatible with Harman Kardon systems:\u003c\/strong\u003e Not suitable for BMW vehicles with factory Harman Kardon amplifiers featuring DSP options in the radio menu and factory subwoofers. Confirm your vehicle's audio system before purchasing.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eVehicle-specific plug, no wire cutting required:\u003c\/strong\u003e The harness includes a plug designed to connect directly into the existing BMW wiring without cutting or modifying the factory loom.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eAnalogue interface type:\u003c\/strong\u003e Analogue SWC interface with SW patch lead, suited to compatible aftermarket head units.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eCustom button remapping available:\u003c\/strong\u003e Default button configuration can be remapped to suit different aftermarket head unit button assignments. Requires a USB-C cable (sold separately) and Aerpro remapping instructions.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eCompatible with Aerpro APP8 ISO harness:\u003c\/strong\u003e Pairing with the Aerpro APP8 Headunit Secondary ISO Harness (sold separately) simplifies the connection between the SWBM9C and the aftermarket head unit.\u003c\/p\u003e\n \u003ch3 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eTechnical specs\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cdiv dir=\"ltr\" class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\"\u003e\n \u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n \u003cthead class=\"text-left\"\u003e\n \u003ctr\u003e\n \u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eSpecification\u003c\/th\u003e\n \u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eDetail\u003c\/th\u003e\n \u003c\/tr\u003e\n \u003c\/thead\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSKU\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSWBM9C\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBrand\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAerpro\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInterface Type\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAnalogue\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePatch Lead Type\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSW\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePhone Button Compatibility\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes (compatible Bluetooth head unit required)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eVoice Assistant Button Support\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNo\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eReverse Trigger Output\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNo\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePark Brake Output\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNo\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSpeed Pulse Output\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNo\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eIllumination Output\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNo\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAmp Remote Output\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes (blue wire)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eOEM Amplified System Retention\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eYes (excludes Harman Kardon)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCompatible Vehicles\u003c\/td\u003e\n \u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBMW with Business head units and OEM amplified systems (excludes Harman Kardon)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/div\u003e\n \u003ch3 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eCompatible with\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe SWBM9C suits BMW vehicles fitted with Business head units and OEM amplified audio systems. Not suitable for vehicles with factory Harman Kardon amplifiers that have DSP options in the radio menu and factory subwoofers. The aftermarket head unit must be SWC compatible. Steering wheel control functions may vary from OEM functions. Use the Aerpro Vehicle Selector to confirm compatibility for your specific BMW model and variant before purchasing.\u003c\/p\u003e\n \u003ch3 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eFrequently asked questions\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eHow do I know if my BMW has a Harman Kardon system and is therefore not compatible?\u003c\/strong\u003e BMW vehicles with Harman Kardon amplification typically have DSP (digital signal processing) options visible in the factory radio menu and are fitted with factory subwoofers. If your BMW has either of these, the SWBM9C is not suitable. Use the Aerpro Vehicle Selector or contact us to confirm the correct interface for your vehicle.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat does OEM amplified system retention mean?\u003c\/strong\u003e Many BMW models route audio through a factory amplifier before it reaches the speakers. If this amplifier is not kept active after a head unit replacement, the audio output will be significantly reduced or absent. The SWBM9C retains the factory amplifier signal path for compatible Business head unit BMW models, maintaining normal audio output through the existing speaker system.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat is the blue amplifier remote wire used for?\u003c\/strong\u003e The blue wire provides an amplifier remote trigger output that tells a connected amplifier to power on when the head unit is active. Connect it to the corresponding input on the aftermarket head unit or amplifier as required by your installation.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eDoes the SWBM9C support voice assistant buttons on the steering wheel?\u003c\/strong\u003e No. Voice assistant button support is not available on the SWBM9C. Phone button functionality is supported with a compatible aftermarket Bluetooth head unit.\u003c\/p\u003e\n \u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat is the Aerpro APP8 and do I need it?\u003c\/strong\u003e The Aerpro APP8 is a headunit secondary ISO harness that connects between the aftermarket head unit and the SWBM9C interface, simplifying the overall installation. It is sold separately and is recommended but not mandatory for the SWBM9C to function.\u003c\/p\u003e\u003ch2\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e\u003cstrong\u003eLegendary Products \u0026amp; Support From Authorized Dealers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\r\n\u003cp\u003eWhen you choose \u003cstrong\u003eFrankies BrandBeast\u003c\/strong\u003e, you're choosing quality and performance. But just as important as what you buy is \u003cstrong\u003ewhere\u003c\/strong\u003e you buy it from. Here's why purchasing from an \u003cstrong\u003eauthorized dealer\u003c\/strong\u003e is always the right choice:\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e▸ \u003cstrong\u003eExpert Knowledge \u0026amp; Training\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOnly authorized \u003cstrong\u003eFrankies BrandBeast\u003c\/strong\u003e dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e▸ \u003cstrong\u003eAuthorized Warranty Protection\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eWe offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don’t be misled by unauthorized sellers who can’t provide genuine warranty support.\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e\u003cstrong\u003e▸ Reliable Customer Support\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eIf you ever run into an issue, you’re backed by \u003cstrong\u003eFrankies BrandBeast’s\u003c\/strong\u003e official manufacturer’s warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e▸ \u003cstrong\u003eProtect Your Investment\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eBuying from an authorized dealer ensures you’re getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few bucks worth losing all that?\u003c\/p\u003e\r\n\u003ch3\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e\u003cstrong\u003eChoose wisely. Buy from Frankies BrandBeast today!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\r\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003c\/p\u003e\r\n\u003cstyle\u003e\n\n        h2, h3 {\n\n            color: #000080 !important;\n\n        }\n \n        h2 {\n\n            font-weight: bold;\n\n            margin-top: 1rem;\n\n            margin-bottom: 0.5rem;\n\n        }\n\n        h3 {\n\n            font-weight: bold;\n\n            margin-top: 1rem;\n\n            margin-bottom: 1rem;\n\n        }\n\u003c\/style\u003e\r\n ","brand":"Aerpro","offers":[{"title":"Default Title","offer_id":46529861157014,"sku":"SWBM9C","price":359.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0675\/0742\/1334\/files\/SWBM9C_600.jpg?v=1786597163","url":"https:\/\/brandbeast.com.au\/products\/aerpro-swbm9c-swc-interface-bmw-amplified-excluding-harman-kardon","provider":"Frankies BrandBeast","version":"1.0","type":"link"}