Are you looking to run multiple OBD2 devices in your BMW E46? Installing an OBD2 splitter is a straightforward modification that allows you to connect more than one device to your car’s OBD2 port simultaneously. This guide provides a step-by-step walkthrough for installing an OBD2 splitter in your E46, perfect for enthusiasts who want to monitor their car’s performance and use accessories without constantly swapping connections.
Tools Needed
Before you begin, gather these tools:
- Phillips head screwdriver
- Small Torx set
- Trim removal tool
- Mini flat head screwdriver
Parts Required
You will need to purchase these parts online:
- OBD II splitter cable
- OBD Splitter Mounting Bracket
Step-by-Step Installation
Follow these steps to install your E46 Obd2 Splitter:
1. Remove Hood Release Handle and Lower Dash Screw
Start by using the Phillips head screwdriver to remove the screw securing the hood release handle. Once removed, you’ll see another screw behind it. Use your Torx set to remove this second screw.
2. Access the Kick Panel
Next, gently pull back the door weather stripping near the dashboard. Remove the black plastic door trim to gain access to the kick panel. Now, remove the kick panel that surrounds the OBD II port. Carefully pull it towards the transmission tunnel. It is held in place by two snap clips.
3. Disconnect Trunk Release
Locate the snap connector closest to the trunk release and use the trim removal tool to detach it. Place the connector in a safe spot on the kick panel for reassembly. Push the trunk release button from behind to free it from the kick panel. Rotate the trunk release to see the wire harness clip. Use a mini flat head screwdriver to carefully release the harness. Set the trunk release and kick panel aside.
4. Loosen Lower Dash Panel
Use the Torx set to unscrew the lower dash panel screws. You only need to remove the screw closest to the door and the screw immediately to its right (remove 2 out of the 3 screws). This will allow enough space to work behind the panel.
5. Detach OEM OBD II Port
Locate the two Phillips screws securing the OEM OBD II port to the car. Remove both of these screws to detach the port.
6. Connect OEM Harness to Splitter
Take the OEM harness you just detached and plug it directly into the OBD2 splitter.
7. Attach Splitter Bracket
Connect the first connector of the splitter series to the aftermarket bracket you purchased.
8. Connect Auxiliary Devices and Position Splitter
Plug in any auxiliary OBD2 devices you plan to use into the remaining connectors on the splitter. Gently pull down on the lower dash panel and carefully push the splitter connectors up and behind the dash panel to keep them out of the way. Screw the lower dash panel back into its original position.
9. Secure New Bracket
Screw the new bracket, now holding the OBD2 splitter, into the location where the original OBD II port was mounted.
10. Position OEM Harness and Replicator
Proper positioning of the OEM harness and splitter connection is crucial for the kick panel to fit correctly. Ensure the trunk release harness is positioned as shown in the image below to facilitate reconnection.
11. Reinstall Kick Panel and Trunk Release
Put the kick panel back into place. Having the top snap connector already placed in the kick panel will make reinstallation easier. Ensure the trunk release wiring remains accessible, then plug the trunk release button back into its connector.
12. Reassemble Trim and Weather Stripping
Replace the door trim, followed by the door weather stripping. Finally, reinstall the OBD II access cover to complete the clean, factory look.
By following these steps, you can easily install an OBD2 splitter in your BMW E46, allowing for expanded connectivity and functionality for all your OBD2 devices. Enjoy the enhanced diagnostic and accessory options in your E46!
