YQMAJIM 25ft 2.5mm-to-4P Rear Camera Extension Cable

YQMAJIM's 25-foot 2.5mm-to-4-pin rear camera extension provides a long, shielded pure-copper connection with an optional trigger wire for full-screen reverse display.

If your mirror dash cam or rear camera needs extra reach, this replacement extension keeps video clarity and signal strength across longer runs. Built with thicker pure-copper conductors and a shielding layer, the cable minimizes interference and image degradation that can occur when extending factory camera leads. The included red trigger wire lets compatible dash cams switch to a rear-view full-screen automatically when you engage reverse gear, while the 4-pin connector matches many mirror dash cam systems — just verify 4-pin compatibility before ordering.

How does this extension maintain clear video over 25 feet?

The cable uses larger-diameter pure-copper conductors (about 3.5mm) and an added shielding layer to reduce signal loss and electromagnetic interference on long runs. Thicker wire lowers resistance, and shielding prevents nearby vehicle electronics from degrading the video feed. Together they preserve sharpness and color accuracy better than typical, thinner extender wires.

• 3.5mm pure-copper conductors for reduced voltage drop
• Shielding layer to block interference from car electronics
• Designed for long runs up to 25 feet without significant signal loss

Will the red trigger wire make my dash cam show the rear camera on full screen when reversing?

Yes — the red trigger lead provides a simple way to signal the dash cam when the vehicle is in reverse. Connect it to the backup light circuit so the camera knows when to switch. If you don’t want automatic full-screen switching, the trigger wire can be left unconnected and the cable still works as a standard video/power extension.

• Red trigger wire for reverse-signal connection to backup light
• Automatic full-screen rear view with compatible dash cams
• No trigger connection required for basic video/power pass-through

How do I know this is the right cable for my dash cam?

Confirm your rear camera uses a 4-pin connector and that the dash cam supports a 2.5mm-to-4-pin extension. This product is specifically configured for mirror dash cams and similar systems that use a 4-pin rear camera plug. If your camera uses a 5-pin plug or a different diameter, choose a matching YQMAJIM model instead.

• Check your camera plug: 4-pin required (not compatible with 5-pin)
• Measure existing cable diameter and connector type before buying
• YQMAJIM offers other lengths/configurations if needed

What installation and testing steps should I follow before finalizing wiring?

Test-fit the connectors and verify video/power function before running the cable permanently through trim panels. Confirm the trigger wire behavior with your dash cam, and secure the cable away from moving parts and sharp edges to prevent wear. Taking a few minutes to test prevents returns and avoids rework after trimming panels.

• Plug and test the cable before hiding it under trim
• Verify reverse-trigger behavior if using the red wire
• Route and secure away from hinges, heat, and sharp edges

Who is this for: Drivers and installers who need an extended, reliable connection between a rear-view camera and a mirror dash cam — especially when the factory lead is too short or when a noiseless, high-quality video feed is essential. This cable suits DIY installers, professional fitters, and anyone replacing a worn or damaged rear-camera lead on 4-pin mirror dash cam systems. If you need a different connector or length, search other YQMAJIM configurations to match your setup.