Modern Technology
What are USB Ports?
Charging vs data — they're not all the same.
Simplified animation — not to scale.
In plain English
The familiar USB sockets dotted around the cabin. Some only deliver power for charging, others also carry data to the car's infotainment system for CarPlay, Android Auto or playing music from a USB stick.
A simple analogy
"They look identical, but think of them like sockets in a house — one is a plain power point, the other is power plus a phone line."
How it works
A "charging-only" port wires the +5V and ground pins to a fuse and that's it. A "data" port additionally wires its data pins to the head-unit computer, so the car can read music files, talk to your phone, or run CarPlay/Android Auto over the cable.
Signs of trouble
- ⚠Phone charges but won't connect to CarPlay/Android Auto
- ⚠Slow charging compared to a wall plug
- ⚠Port wobbles or stops working intermittently
- ⚠USB stick not recognised
Rough UK cost
£50–£200
Parts: £10–£60 per port
Labour: £40–£150
Always get a written quote. Prices vary by car, region, and parts brand.
Heads up: Carautonomy is for general guidance only. If your car is showing warning lights or behaving oddly, get it looked at by a qualified mechanic.