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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, nylon wire loom protection, and a weather-resistant rubber dust cover, this 11.6-inch adapter ensures long-lasting, reliable performance across a wide range of vehicles including trucks, trailers, and RVs.
| ASIN | B0BPXR7RTW |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #9,223 in Automotive ( See Top 100 in Automotive ) #21 in Trailer Connectors |
| Brand | Oyviny |
| Brand Name | Oyviny |
| Compatible with Vehicle Type | Trailer, Truck |
| Customer Reviews | 4.7 out of 5 stars 702 Reviews |
| 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 | Metal |
| Material Type | Metal |
| Model Number | SPQ-7P-4P |
| Number of Items | 1 |
| Number of Packs | 1 |
| Unit Count | 1 Count |
| Vehicle Service Type | Trailer, Truck |
D**D
Nice
Fast shipping. Item did the job. Needed this quickly for our move and it arrived on time
S**E
fast shipping
Great product and price
F**O
Easy to remove and connect
Easy to remove and connect
A**R
Good product
Works as it should. Good product
K**R
Fit my needs
This is the one I was looking for. Fits my 2007 Tacoma.
R**T
This is a good product
Worked as advertised. I was very happy with the adapter.
P**L
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.
A**R
I use it as an extender
I needed about another foot of wire so I'm using this as an extender. So far so good. It fits snugly on both ends, seems like robust abrasion resistance, and for me turned out to be a great length.
V**D
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.
Q**N
Great product
Great quality. Works good
T**K
Works Perfectly — Solid Connection and No Issues
Does exactly what it’s supposed to do. The adapter fit perfectly and the trailer lights worked flawlessly right away. Build quality feels solid, and the connection is snug — no flickering or loose fit. Simple, affordable, and reliable. Exactly what you want from a trailer plug adapter.
V**L
0000
works great
T**L
Great tool
Easy to instal and covert 7 pin to 4 pin
Trustpilot
2 months ago
1 month ago