11 25 Piston With Rings And Bolts Technical Data (All M4 Models, 2021-2023)
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
11 25 TECHNICAL DATA OVERVIEW
| Piston diameter | ||
| Measure the piston diameter at distance (A) from the lower end of the piston skirt. | Distance (A) to the lower end of the piston skirt | 10 mm |
| Nominal dimension of piston diameter | 84.001 mm... 83.963 mm | |
| Distance (A) to the lower end of the piston skirt | 24.5 mm | |
| Nominal dimension of piston diameter | 83.979 mm... 83.941 mm | |
| Distance (A) to the lower end of the piston skirt | 49 mm | |
| Nominal dimension of piston diameter | 83.285 mm... 83.247 mm | |