Use this article if…
- Choosing your interface family, Bluetooth wireless or plug-and-play wired, before you buy.
- Fitted the wrong type? Resistor vs electronic + Troubleshoot. MK4 → MK4 steering.
Quick answer
Check your headunit's SWC input type before you order, not the product photos. A Bluetooth wireless bridge and a plug-and-play wired module suit different inputs, so guessing from photos is where most wrong picks start. Confirm the SWC port spec and the harness connector first.
Problem
- You're choosing between SWC module families for your vehicle.
Symptoms
- You're not sure which steering interface fits your vehicle generation.
Cause
- Bluetooth wireless bridges and plug-and-play wired modules suit different headunit input types.
- Each module family trades features against complexity, so pairing, firmware and support differ.
Fix Step-by-step
- Start with your vehicle year, make and factory audio type.
- Check the harness plugs in the product photos match yours.
- Check whether your cruise and phone buttons need extra leads.
- Buy from a supplier that lists your exact chassis code.