How to solve the noise of Roewe i5 engine?

The following is the solution of Roewe i5 engine noise: 1. The car engine is noisy. When you want sound insulation, you can install sound insulation cotton on the engine cover, which can effectively shield some noise. 2. You can also install soundproof cotton in the door, or you can shield some noise. Please check the generator and compressor. If the bearings of idler and tensioner are damaged, and the bearings are damaged, it will make a buzzing sound. You can also make a cover, or add soundproof cotton to the firewall for processing.