Mr12Volt MOST Bus Fibre/Fiber Optic Y Splitter 90cm - Optical Y Lead/Y Harness/Y Cable/Y Adapter, Loop Splitter for Audi BMW Mercedes Porsche VW Volvo - MMI iDrive COMAND PCM - OEM Audio Network Expansion

MOST bus optical Y lead 90 cm by Mr12Volt

Expand your factory infotainment network the right way with this Mr12Volt 90 cm optical Y lead. Purpose built for vehicles that use a MOST ring, this dual-branch harness lets you add an extra module into the factory fibre network without hacking the original loom or degrading signal quality. Ideal for tidy, OEM-style integrations on premium German marques.

Perfect when you want to integrate a CarPlay interface, Bluetooth streaming or handsfree kit, DAB+ tuner, CD changer emulator, multimedia gateway, digital amplifier or similar MOST devices while keeping the factory audio and navigation setup intact. Clean plug-in solution, stable light transmission, neat routing length and dependable connectors for a professional result.

Why enthusiasts choose this optical Y lead

• Designed for MOST bus expansion to add a second device into the factory fibre loop
• 90 cm length for flexible routing behind the dash, glovebox or boot electronics bay
• Low-loss fibre for consistent light levels and glitch-free data on the network
• OEM-style push-fit terminations that lock positively for a secure install
• Maintains the integrity of the ring architecture when installed correctly

Compatible platforms and typical use cases

Suits many vehicles from Audi, BMW, Mercedes-Benz, Porsche, Volkswagen and Volvo that run a MOST optical network. Common platforms include MMI, iDrive, COMAND and PCM based systems, plus other manufacturer variants that use a fibre loop for audio and multimedia distribution.

Frequent applications include adding:

• CarPlay or Android Auto retrofit modules
• Bluetooth audio and handsfree units
• DAB or DAB+ tuners
• CD changer emulators and multimedia gateways
• External OEM-style digital amplifiers

Installer notes

• For vehicles equipped with a MOST optical network only
• Observe the light direction on the connectors to preserve the loop order
• Avoid tight bend radii and protect fibre ends from dust during handling
• Seat connectors fully until they click to prevent intermittent dropouts

Proven in our workshop

We regularly fit this Mr12Volt optical Y lead in customer cars and it has been consistently reliable with excellent feedback. It delivers a clean, factory-style expansion path for retrofits and upgrades where stability and audio performance matter.

Professional fitting

Want it installed for you. MJ Modifications in Warwickshire can supply and fit as part of your retrofit or audio upgrade. Request a quote at info@mjmodifications.co.uk.

Also searched as

MOST bus Y harness, optical network split lead, fibre-optic Y loom, infotainment network splitter, MMI loop adapter, iDrive optical branch cable, COMAND loop Y lead, PCM fibre Y connector, VAG optical splitter, OEM audio network expansion cable.