Car Stereo Repair or Replace? How to Decide

Repair a car stereo when the fault is in the wiring, a fuse, a speaker or the aerial, because those are usually quick and cheap to fix. Replace it when the head unit itself has failed and is more than a few years old, because a new unit with Bluetooth, CarPlay and Android Auto often costs about the same as repairing the old one, and you get a better stereo.

Faults that are usually worth repairing

• Cuts out over bumps: a loose power, earth or wiring connection behind the unit, often from an earlier installation.
• One speaker silent or crackling: usually the speaker or its wiring, not the stereo. Check the balance and fader first.
• No power after a battery change: a blown fuse, or a factory radio asking for a security code. See Japanese car radio asking for a code.
• Poor reception: the aerial lead or an aerial amplifier that is not powered. See poor car radio reception.
• No sound after a new stereo: often a factory amplifier that is not being switched on.

Signs the head unit itself has failed

• It has power at the plug but will not turn on.
• The screen is dead, frozen or the touch no longer responds after a restart.
• The volume knob, buttons or CD mechanism have stopped working.
• It reboots on its own or loses its settings every time.

These are faults inside the unit. On an older stereo, a replacement is nearly always the better use of money.

When replacing is the better buy

If the stereo is old, has a Japanese-only menu, or you have wanted Bluetooth, CarPlay or a reverse camera anyway, a new head unit fixes the fault and upgrades the car in one go. See head unit installation and how to choose a car head unit.

Get it checked

Start with the simple checks in our guide to car stereo problems. If that does not sort it, we find the fault at your home or work anywhere in Auckland and tell you honestly whether to repair or replace: see car stereo repair.

Frequently asked questions

Is it worth repairing an old car stereo?

If the fault is wiring, a fuse, a speaker or the aerial, yes. If the unit itself has failed and it is old, a new head unit is usually better value.

Can a car stereo be repaired without taking it out?

Many faults can, because they are in the fuses, speakers or aerial. Wiring behind the unit means taking it out of the dash to check the connections.

Why does my car stereo keep cutting out?

Usually a loose power, earth or wiring connection behind the unit. It often shows up over bumps and is one of the most common repairs.

How do I know if it is the stereo or the speakers?

If only one or two speakers are silent or crackle, it is usually the speakers or their wiring. If every source and every speaker is silent, look at the stereo, its fuse or a factory amplifier.