Japanese Car Radio Asking for a Code? What to Do
Many Japanese car stereos have an anti-theft lock. When power is lost, for example when the battery is replaced or the unit is unplugged, they ask for a security code or password before they work again. The fix is to find the original code. If you cannot, a code service or replacing the unit are the options.
Where to find the code
- The car's papers: check the owner's manual, the service book and the glovebox for a card or sticker.
- The previous owner or the importer: the dealer that imported the car may have it on file.
- The unit itself: some units show a number on screen when locked, such as an ERC code on many Toyota units. Code services use that number, or the unit's serial number, to work out the code.
Do not guess
Most units only allow a few wrong attempts before locking for longer, or for good. Write down the number the screen shows before you try anything, and only enter a code you are confident in.
Unlock services
Online services offer codes for Japanese units from the number on screen or the serial number. Some are reliable and some are not, and they are only for a unit in your own car. Check reviews and what they need before you pay.
When replacing the unit makes sense
A locked Japanese unit is often also in Japanese, with a satnav for Japan and a radio that misses part of the NZ FM dial. If you are fixing the code anyway, a new head unit with Apple CarPlay and Android Auto fixes the language, the radio and the lock at once, and there is no code to lose next time. See Japanese car stereo conversion and our guide to changing a Japanese car radio to English. Toyota Aqua owners can read the Aqua stereo guide.
Frequently asked questions
Why is my Japanese car radio asking for a code?
The anti-theft lock switched on because the unit lost power, usually after a battery change or the unit was unplugged.
How do I unlock a Japanese car radio without the code?
Use the number shown on the locked screen, or the unit's serial number, with a code service. Do not guess, because wrong attempts can lock it for longer.
Can a Toyota dealer in NZ give me the code?
For a Japanese-market unit, often not, because it was never sold in NZ. The importer or a code service is more likely to help.
Is it worth replacing a locked Japanese radio?
Often yes, if it is also in Japanese and misses NZ stations. A new head unit fixes the lock, the language and the radio together.