If your Volkswagen car has a coolant leak, it can lead to some serious issues. Firstly, your car may overheat, which could cause serious damage to the internal components. This could lead to problems such as a blown head gasket, warped head or block, or even a cracked cylinder head. Secondly, the coolant can start leaking onto the ground and create a slippery surface, which can be hazardous to other drivers. Last, but not least, the coolant is highly toxic and needs to be handled with care, as it can be harmful to the environment and people.