OBD2 Splitter, bbfly-B31 Full 16pin OBDII Port 1 Male Splitter to 2 Female Extension Cable 1.6IN/4CM (B31 1PACK)

I needed this because I use 2 Bluetooth apps simultaneously on my car (one to change tune maps on the fly; one to operate an exhaust valve) and didn't want to swap out the obd plug every time. This did the trick. It allows me to change maps, monitor values and change my exhaust valve in seconds rather than much longer if I needed to pull one plug out and plug another in every time. Not to mention it is reducing unneeded wear and tear on my obd port. Just make sure you look at your obd port and see which side is facing out. The smaller side or the larger side and get which one fits in your car. If you have the side port on the adapter facing interior plastic it will be useless and may not even fit at all so check before you order.

Works perfectly on 2nd Gen Tacoma. I purchased this to run the ODB for an aftermarket headunit and still allow access to the ODB port without unplugging the headunit. Probably will purchase another for other vehicle.

The OBD2 Splitter is a fantastic choice if you need to run multiple devices from your vehicle's OBD2 port without constant swapping. Its ultra-compact design makes it ideal for tight spaces, ensuring it stays out of the way while providing two fully functional ports. I use 1 port for my dash cam while leaving 1 port for diagnostics, so the mechanics don't have to unplug my camera anymore.

I have a 2021 Ram 1500 Classic with aftermarket electric running boards. My running boards draw power and signals from the OBD2 port to function correctly. Bought this splitter so I can hook up my running boards and still have the ability to connect my bi-directional scanner to the truck without having to disconnect my running boards and wear out the OEM OBD2 connection over time. Someone else mentioned this and it should be noted more clearly: There are two types of components that you will probably connect to the OBD2. Active or Passive Passive means that it receives power and/or information but does not send anything back. Active means it can communicate with the modules (computers) and manipulate them such as send signals/commands back (think a bi-directional scan tool). You DO NOT want to use this splitter to connect 2 active units at the same time. My running boards (for all intensive purposes) are passive. It does have a module that controls when to extend/retract the running boards but it is external and does not connect to the canbus or truck (other modules). It gets its power and signals (when the doors are open/closed) from the OBD2 port but that is it. When I connect my scanner, I have one passive (running boards )and one active (bi-directional scanner) unit connected to the OBD2 ports at the same time. You can have 2 passives or 1 passive and 1 active but I wouldn't suggest 2 actives. They could have compatibility issues and possibly cause internal damage to modules trying to communicate simultaneously. Imagine having 2 bi-directional scanners hooked up at the same time. One commands the truck to turn the cooling fan on and the other is commanding not to. You're asking for trouble doing things like this. If you need the ability to connect 2 active units at the same time, but don't want to constantly connect/disconnect both from the OBD2 port, I would suggest some type of splitter with a toggle switch that only allows power/communication 1 at a time. Keeps everything protected this way. Overall, very good splitter that doesn't break the bank for my needs.

It does enable me to do what I wanted to do, however the scanner device keeps falling out of the socket so I haven’t been able to use the scanner device I bought it for. I’m thinking about trying duct tape to hold it in place.

Easy to install and works great, especially if you have multiple OBII plug ins.

Soon as I plugged this in a 2011 Cadillac, my dashboard and media screen started blinking and the truck made a lot of clicking sounds. A lot of error codes popped up so I turned off the truck, removed this obdii splitter, removed the ground off the battery for a few minutes and put it back luckily nothing damaged and no error codes remained on but will never use it, I’m going to return it and based off my experience, I cannot recommend this.

This device does not appear to be a true splitter. I bought it because I have a dashcam that uses the ODB2 port to draw power, and a Snapshot device from my insurance company that uses the ODB2 port to read telemetry. The Snapshot device is unable to read any vehicle data through this splitter. It appears to only have pinouts for the power and ground leads, not the signal leads. Uselss for my intended application.