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Metra antenna adapter with flat plug and cable

METRA

METRA 40-VW10 antenna adapter car electronics accessory

SKU CH-03A0-AYJXJ MPN 40-VW10

Connects a factory flat-plug antenna to an aftermarket radio in select 1988-2005 Audi, BMW and Mercedes vehicles and includes a capacitor for impedance matching

  • TypeCar Stereo Add-Ons
  • Connects factory antenna to aftermarket radio
  • Includes capacitor for impedance matching
  • Fits select 1988-2005 Audi/BMW/Mercedes models
  • Flat plug design for direct installation
  • Alternative 40-VW12 available for newer European radios

Vehicle compatibility

This Metra 40-VW10 adapter connects a factory antenna with a flat plug to an aftermarket radio in select 1988-2005 Audi, BMW and Mercedes models. It is intended for owners replacing the original head unit while keeping the existing antenna cable.

Build integration

The adapter plugs directly between the vehicle's factory antenna lead and the new radio's antenna input, requiring no extra wiring or tools. A capacitor is included to match impedance between the two connections.

Sustained behaviour

Some newer European radios have built-in capacitors that prevent this adapter from working properly; in those cases the 40-VW12 variant may be required. The adapter itself is a passive component with no active circuitry to degrade over time.

Highlights

  • Connects factory antenna to aftermarket radio
  • Includes capacitor for impedance matching
  • Fits select 1988-2005 Audi/BMW/Mercedes models
  • Flat plug design for direct installation
  • Alternative 40-VW12 available for newer European radios

Specifications

BrandMetra
TypeCar Stereo Add-Ons
Shipping weight0.02 kg
Package size25 × 25 × 25 mm

Questions about this item

Does the factory antenna adapter support the 1988 to 2005 Audi, BMW and Mercedes models listed?

The adapter connects a factory flat-plug antenna to an aftermarket radio for select 1988-2005 Audi, BMW and Mercedes vehicles.

Will the included capacitor affect heat or electrical noise during daily driving?

The capacitor matches impedance for clean signal transfer and adds no measurable heat or noise in normal use.

Must the aftermarket radio have a specific antenna input for this adapter to work?

The adapter fits standard aftermarket radio antenna inputs; some newer European radios with built-in capacitors may not work properly.

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