Xiaomi SU7 Ultra Braking and Chassis Parts List: Carbon Ceramic Discs and Air Suspension

Carbon ceramic brakes and air suspension are the two systems that define how an Ultra drives, and both are difficult to examine outside a workshop. This list collects the Ultra braking and chassis stock on hand, including a used carbon ceramic disc and caliper set, caliper motors, the master cylinder and the air suspension components.

What the braking and chassis set contains

The brake side starts with the headline item: a used set of brake calipers with carbon ceramic discs, which is the only realistic way to inspect the disc's friction ring, its mounting bell and the pad wear pattern on a car of this class. Alongside it sit rear carbon ceramic discs, caliper motors for both ends, the brake master cylinder with its booster pump and the brake ventilation duct that feeds cooling air to the front axle. The chassis side carries the air suspension hardware - air pump and air suspension unit, a front shock absorber and a vehicle height sensor - which together cover the parts that set ride height and damper behaviour.

Parts list 8 items

The carbon ceramic disc set is used and is described with its wear state. Caliper motors and hydraulic parts are listed individually. Air suspension components are shipped drained.

What to inspect on carbon ceramic and air suspension

On a carbon ceramic disc, the measurable items are the friction ring thickness, the presence of any edge chipping, and the weight difference against a comparable iron disc - that last number is what the whole system is bought for. The caliper is best read on piston count, bridge stiffness and how the parking brake is integrated, since an electric caliper motor changes the rear axle layout entirely. On the air suspension, note whether height is sensed at all four corners or only at the rear, and measure the damper body against the standard car to see how much of the Ultra's body control comes from hardware rather than calibration.