Only Red antifreeze type is suitable and you’ll need 6 liters of it. There are some conditions in servicing cooling module at Peugeot 106. It’s important to provide cooling for Peugeot’s engine with 1.5 liters volume. In other way 2003 106 won’t be used quite long and efficiently. It’s better to choose fluid in combination of 2000 year, 1.6 volume of motor and engine code of NFX(TU5J4).
Providing you keep the rules 1.5 motor installed in 106 of 2003 year will be long lasting. So better use Peugeot’s advice for servicing 2001 106. Every Peugeot owner should remember that engines with code VJX(TUD5) are quite demanding. So, don’t choose different from Red coolant and obey the number of 6 liters.