Before you buy: check the whole setup
Check your exact vehicle, device and harness before ordering.
Start with the exact vehicle
Write down the make, model, model year, trim, region and factory driver-assistance options. Search the official compatibility checker for that combination. A familiar badge or a similar model year is not enough to establish support.
Read the conditions
Open the vehicle entry and read the required packages, harness and limitations. If your exact configuration is absent or unclear, ask for clarification before purchasing. Do not infer compatibility from this forum’s make flairs.
Match the hardware
Check the current shop and setup guide. Confirm that your intended software branch supports the device you are buying, especially if purchasing a used device.
Ask a useful question
Create a Getting started post with the vehicle details, device you are considering, and the official entry you checked. State what remains uncertain. Members can help interpret the information, but the manufacturer and software maintainer remain the sources for current support.