Refrigerant Circuit With Refrigerant R744 (Carbon Dioxide), Detecting Leaks

WARNING: This page is about a different car, the 2022 Volkswagen ID.4 and 2021 Volkswagen ID.4. However, it is still accessible from the selected car via links, so may be relevant.

The refrigerant circuit may leak due to external damage, using the wrong or contaminated refrigerant, or using unapproved materials in unsuitable components, for example.
The small quantity of refrigerant escaping from minor leaks can be detected, for example, by using forming gas with a leak detection spray or by introducing a leak detection additive into the refrigerant circuit.