About the CANBus
This product is WITHOUT canbus.
1) If there's errors, but the lamps works well, this is the vehicle detection that it is not a stock light, it's normal and will not have bad effects, you can ignore the errors.
2) If the lamps works abnormal, pls test the lamps with external 12V power, if it works normally, it need the extra decoders to solve the problem; if it did not work, please contact customer service for help, thanks for your understanding.
About the adapter(connectors ring)
When buying H7 lamp, pls check if the original h7 halogen lamps need extra adapters(connectors ring), if so you will also need adapters(connectors ring) for led lights, pls contact customer service, we will help to confirm it.