Keenso Car Rear View Rectifier for Germany/American Car Series, 12V DC Power Relay Capacitor Filter Connector for Backup Camera Rectifier Auto Car Camera Filter Light Modification

The Keenso Car Rear View Rectifier is a solid little upgrade that solved the flickering and weak reverse lights on my vehicle! Installation was straightforward — the 12 V plug‑and‑play design fit right in with my backup light wiring without any complex wiring changes. Once installed, my reverse lights are steady and bright, with no more flicker or dimming when other accessories are running. The relay and capacitor filter feel well made and durable, and I appreciate that it’s designed to work with a wide range of German and American car models. It’s compact but effective, and it gives me confidence that the backup lights are getting a cleaner, more stable power supply. Overall, this rectifier/relay filter unit delivers excellent performance and value. If you’re dealing with reverse light issues, this is a simple fix that really works — highly recommended!

I installed a backup camera I bought on Amazon. The camera didn't work and research showed that I needed this rectifier. I have a 2013 Mercedes GLK 350. Once I installed this the backup camera worked perfectly. Highly recommended

Just installed a backup camera on my bmw 325i and got this product because I wasn't getting a signal, but it worked in the run postion and the camera had lights that were also on. After installing this, it didn't fix my problem at all, and now my camera doesn't even get power anymore. It isn't even well put-together, nor is it really anything. This is literally just a 1000 micro farad capacitor as well. Waste of time and money.

I installed an aftermarket backup camera in my 2013 Volkswagen Jetta GLI. I tapped into the power wire of my reverse light bulb. The camera powered on when running off battery power just fine, but when the engine was running, the video feed cut out. This rectifier fixed that problem. It was easy to hook up and works great. Glad it was cheap and simple fix!

Had to bubble gum from factory setup, used oem camera and third party viewing mirror. Same mirror works great in other vehicle. But this one has a blurry picture. Picture is still blurry some, but think it did help some. Cannot say much pro or con about it, since issue could be the long wiring I used and second relay board.

This device does what it is supposed to do: It provides a steady voltage from the backup light positive and ground wires to the backup camera. Before: The backup camera picture was good with engine off, no signal with engine on. After: Backup camera picture is good with engine off, and engine on. I used high quality butt connectors and a professional-grade crimping tool. Your results may vary if you use wire-taps or sub-standard connectors or tools.

I installed a universal backup camera on my truck a few days ago and have had intermittent flickering when the engine is on. Sometimes the picture would just flicker bright and dim and other times the feed would cutout to a black screen for a second or two. After researching I landed here and decided for $6 I’d try the rectifier. First, it does install and works, but did nothing to help the flickering screen. It MIGHT give the feed just slightly more clarity, but not much else. The fix for my issue was disconnecting the negative/black wire from my reverse light (which I learned from YouTube as apparently the negative wire connection creates engine interference) Another thing about this rectifier, the installation is a bit confusing. The box has an “in” and an “out” maybe I overlooked the instructions somewhere here on the page (none came with the unit) but I assumed the “in” would connect to the camera side and the “out” would run to the reverse light, but hooked up that way I had absolutely no power triggering the camera. I honestly didn’t even think the direction would matter but it does, at least in my setup. So, please be warned on install you may have to ensure the “out” wires run towards your camera and the “in” wires towards your reverse light. Overall, it’s a $6 part and I’m going to leave it installed for now unless it fails completely because while it doesn’t seem to be doing much it isn’t hurting anything and it’s really not worth undoing all the wiring at this point.

Unsure on longevity or any variables like that, but upon installation it immediately cleared up the static in my rearview camera that was being created by aftermarket LED taillights. Just install inline on your positive reverse wire (if that is what is activating & powering your camera) and enjoy the clearer view!