Metra 40-NI21 Infiniti / Nissan Antenna Adapter

Name: Metra 40-NI21 Infiniti / Nissan Antenna Adapter
Brand: Metra
SKU: 40NI21
Price: 11.99 USD
Availability: InStock
Rating: 4.6 (5 reviews)

Metra 40-NI21 Infiniti / Nissan Antenna Adapter - Main image

$11.99 ~~$19.99~~ In stock

Category: Misc

Metra 40-NI21

Antenna AdapterDescription

NISSAN DIVERSITY FACTORY RADIO WITH 2 PIN CONNECTORTO AFTERMARKET ANTENNA
DISABLES DIVERSITY FUNCTIONS

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

James ★★★★★ Oct 18, 2026

Finally got my aftermarket radio working in my Nissan after struggling with the factory diversity setup — this little adapter disabled that function perfectly. The two-pin connector matched up without any fuss.

Andrew ★★★★★ Oct 13, 2026

Swapped the stock stereo in my Frontier and this adapter clicked right into the 2-pin factory plug with zero fuss. It does kill the diversity antenna function like the listing says, but reception is still perfectly fine for my daily commute.

Lily N. ★★★★★ Oct 11, 2026

My Nissan's factory radio had that annoying diversity feature that kept cutting out—this little adapter fixed it perfectly and the 2-pin connector clicked right in.