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Small black plastic antenna adapter with coaxial connectors, about 13 inches long

METRA

METRA 40-NI22 antenna adapter car electronics accessory

SKU CH-SEJA-EQ496

Connects factory antenna cable to aftermarket radio, measuring 13.25 inches long by 2.00 inches wide

  • Product typeCar Stereo Add-Ons
  • Key featuresUsed To Adapt Factory Antenna Cable Connection To That Of An
  • Overall height0.38 in (0.97 cm)
  • Overall width2 in (5.08 cm)
  • Overall length13.25 in (33.7 cm)
  • Product weight0.05 lb (0.02 kg)
  • Connects factory antenna to aftermarket radio
  • Compact 0.38" height fits tight dash spaces
  • Lightweight 0.05 lbs adds minimal harness weight
  • 25" length reaches across dashboard openings
  • Metra installer-trusted design for reliable connections

Factory Antenna Adapter

The Metra 40-NI22 is a new antenna adapter designed to connect a factory antenna cable to an aftermarket radio head unit. It bridges the proprietary OE connector and the standard aftermarket plug so the original antenna functions with the replacement stereo.

Check Connector Compatibility

Verify that your vehicle's original antenna plug matches the adapter's input side before ordering. The adapter is built for a specific OE interface; mismatched factory connectors will prevent a secure fit and proper signal transfer.

Signal Pass-Through Under Continuous Use

The passive coupling maintains consistent RF continuity during extended driving sessions without active amplification or power draw. Performance remains stable as long as the mechanical connection stays seated and free of corrosion.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 91% of the 2,768 comparable items (median $21.99).

Specifications

Product
Brand nameMetra
Product typeCar Stereo Add-Ons
Size & build
Overall height0.38 in (0.97 cm)
Overall width2 in (5.08 cm)
Overall length13.25 in (33.7 cm)
Product weight0.05 lb (0.02 kg)

Questions about this item

Does the 40-NI22 adapter ship with any extra cables or mounting hardware, or is the adapter itself the only piece in the box?

The package contains only the antenna adapter; no additional cables or mounting hardware are included.

The title shows 40-NI22 — are there other versions or capacities I should consider for my vehicle?

The 40-NI22 is a single part number with no alternative versions or capacities listed; choose it when your aftermarket antenna needs to connect to the factory radio socket.

Once installed, what does the 13.25-inch length mean for routing behind the dashboard?

At 13.25 inches long, the adapter provides enough reach to bridge the factory antenna cable to the aftermarket radio without excessive slack.

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