What are the projects of BMW x 1 to clean up carbon deposits?

Hello, cleaning up the carbon deposit inside the engine is generally about 40 thousand kilometers. If you drive on a congested section of the city for a long time, you need to advance it appropriately. At present, the 4s shop adopts disassembly-free cleaning, and there are several methods: if there is too much carbon deposit, it is best to spray cleaning liquid from the spark plug hole to wash away the carbon deposit in the combustion chamber. Use special equipment to pump a good carbon remover into the combustion chamber from the spark plug hole, so as to melt the carbon deposits in the combustion chamber, and then suck these liquid carbon deposits out of the spark plug hole. Without disintegration, this method is the best at present, and the price is around 800 yuan. If it's not too much, you can hang bottles for cleaning, and the cost is about 300-500 yuan. You can clean the injector by hanging the bottle. As for the throttle, you should check it every 10000-20000 km. If it is polluted, it should be cleaned up in time. The cost is about 50- 100 yuan. I hope my answer is helpful to you.