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The Oyviny 7 Way to 4 Way Trailer Plug Adapter converts your vehicle’s 7-pin RV blade connector to a 4-pin flat trailer plug, enabling seamless power transfer for trailer lights. Featuring a durable molded design, weather-resistant materials, and a protective nylon wire loom, this 11.6-inch adapter ensures long-lasting performance and easy plug-and-play installation across a wide range of vehicles including trucks, RVs, and caravans.
| Asin | B0BPXR7RTW |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #6,137 in Automotive (See Top 100 in Automotive) #21 in Trailer Connectors |
| Brand Name | Oyviny |
| Compatible With Vehicle Type | Trailer, Trucks |
| Customer Reviews | 4.7 4.7 out of 5 stars (660) 4.7 out of 5 stars |
| Finish Type | Powder Coated |
| Included Components | 1* RV 7 Pin to 4 Pin Flat Trailer Wiring Adapter |
| Item Type Name | 7 blade to 4 flat trailer plug adapter |
| Item Weight | 0.22 kg |
| Manufacturer | Oyviny |
| Manufacturer Part Number | SPQ-7P-4P |
| Manufacturer Warranty Description | 1 Year |
| Material Type | Stainless Steel |
| Model Number | SPQ-7P-4P |
| Number Of Items | 1 |
| Unit Count | 1 Count |
User
OEM quality
Most expensive trucks come with something similar when new but never get passed along with the used truck . This fits perfectly and works great
User
Good quality would buy again
Works great
User
Works
1998 Dodge Ram Magnum 1500. Works great, fits perfect. The fact that you have the flex extension is perfect because there isn't much room between the hitch and plug.
User
Great Fit
Great fit, right on time and decent price.
User
This is a good product
Worked as advertised. I was very happy with the adapter.
User
Works exactly as it should. No complaints.
Plug and play, confirmed all functions worked. Off to the lake we went!
User
High quality product
I got a new SUV with a trailer package, but it only has a 7 pin. This works perfectly when you need to convert form a 7pin to a 3 pin for light duty trailers! Great product
User
Great buy for new trucks with 4 wire trailers
Works great on 2025 GMC 1500, no problems and works with the bells and whistles on the GMC Trailer towing package.
User
Perfect Fit for Thule E-Bike Rack + Mercedes GLE 450e — Highly Recommend
I needed a 7-way to 4-way trailer plug adapter to connect my Thule e-bike rack's lighting system to my 2025 Mercedes-Benz GLE 450e's 7-way trailer plug. Before finding this one, I tried a few other adapters, and each had issues — on some, the running/tail lights didn't work, and on others, the turn signals failed to transmit properly.The Oyviny 7-way to 4-way adapter solved all of that. It matches perfectly with both my vehicle's plug and the bike rack's wiring — turn signals, brake lights, and running lights all function exactly as they should, with no flickering or intermittent connection issues.Beyond the electrical performance, the build quality stands out. The housing feels solid and well-sealed, and the connector pins are sturdy, so I'm confident it'll hold up to regular use and exposure to the elements.If you're trying to connect a 4-pin trailer light setup (bike racks, small trailers, etc.) to a vehicle with a 7-pin harness, this adapter is a reliable, no-compromise solution. Fully recommend it.
User
Happy with the purchase
I got what I expected. Adapter pin configurations are as described by seller. Pushed in no issues. Held fine during the drive. Pulled out when done with no issues. Nice little rubber dust cap for 4 pin end for when you're storing it. Reached fine for my purposes, not too short or too long.I've only used it lightly so far for about 200kms of driving so I can't say for sure how it would hold up over months and years of regular use but so far so good and I don't expect any issues. Seems reasonably durable. Easy and convenient online shopping and it arrived within a couple days.
User
Great tool
Easy to instal and covert 7 pin to 4 pin
User
0000
works great
User
New adapter
Great quality works perfectly
Trustpilot
2 months ago
5 days ago