Compound and carbon ceramic are not one procedure
The 2022 M4 manual distinguishes the two systems and gives different initial bedding-in guidance. Use the instructions for the actual equipment; do not copy a generic aggressive braking routine from the internet.
Sources 1
What to record
Describe the sound
Note cold or warm brakes, wet or dry conditions, light or firm braking and whether the sound occurs near a stop. Include recent pad, disc or wheel work.
Separate noise from function
Report pedal changes, pulling, vibration and warnings separately. A sound that resembles a known M-brake characteristic does not prove that another symptom has the same cause.
A useful professional comparison
BMW’s general M-brake reference explains several condition-dependent noises and advises customers who are unsure to contact service. It also favors conservative cleaning of brake dust rather than high-pressure jets. It predates this chassis and must not be treated as its parts-replacement instruction.
Sources 2
After the inspection
Ask which brake system and condition were identified, and whether the finding is a characteristic or a fault. Keep that explanation with the vehicle’s brake-service record.
Sources / references 2
- BMW AG — 2022 M4 owner’s manual, p.308 (archived OEM manual) ↗Reviewed Sep 27, 2026
- BMW — SIB 34 10 19, December 2019, M brake reference ↗Reviewed Sep 27, 2026
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