BBA, as a representative model in the domestic luxury car market, has always been the preferred brand for domestic consumers to choose luxury models. However, even if there is luxury brand endorsement, there will also be unexpected quality problems. A few days ago, we learned from the vehicle quality complaint platform and the vehicle quality website that recently, many owners of BMW’s new 3 series have complained that there are two major problems of cooling system failure and engine leakage of antifreeze. < / P > < p > a car owner complained that on August 21, he bought a 2020 320li m sports suit model in a 4S store. On August 27th, the car owner found a serious antifreeze problem. < / P > < p > at the same time, the owner said that since the collection of the car, the vehicle has not had any scratch and bump, so it is suspected that the vehicle has this quality problem when it leaves the factory. < / P > < p > and this situation is not an exception. Some car owners reported that they bought the 2020 325li m sports suit in March. After collecting the car in April, they normally used the car. In August, the vehicle suddenly prompted that the vehicle needs to be filled with coolant when driving on August 29. < / P > < p > the owner is very surprised that the new car has to add antifreeze so quickly. Subsequently, the vehicle was towed to the 4S shop for maintenance. Subsequently, it was found that there was a problem with the thermal management module of the vehicle, and the accessories needed to be replaced. < / P > < p > the owner also said that at present, there are more than 90 car owners who have encountered the same problem, all of which are thermal management modules, leading to the loss of vehicle coolant under abnormal loss. < / P > < p > moreover, these vehicles are all from March to April 2020, and the manufacturer neither recalls nor publishes relevant announcement to explain the situation. < / P > < p > in addition, it is no longer a secret for BMW 3 series to leak antifreeze. After searching for “BMW 3 series of anti freeze fluid”, we can find a lot of owners and make complaints about BMW’s 3 Series antifreeze. The report shows that the number of app store purchases soared in the first half of this year due to the impact of covid-19