So how do you judge how many pistons a caliper has? It's simple. The round openings on both sides of the caliper are pistons. Count yourself. How many pistons are there? You can know this at a glance.

Many cars think that the more pistons and calipers there are, the more powerful the brakes will be, which is wrong. Whether the braking effect of a car is good or not depends on many things. Such as: oil circuit design, brake master cylinder, pedal design, brake oil selection, brake disc, brake pad and so on.