Article C5.18.2

MGU-K Rotating Parts Link

Technical Regulations

Article C5.18.2

FIA Source

MGU-K Rotating Parts Link

Chapter: C5

In Simple Terms

The MGU-K (Motor Generator Unit-Kinetic) must be directly connected to the engine's crankshaft at all times during normal racing, spinning at a fixed ratio to it. Think of it like a mechanical chain—the MGU-K and its shaft must also run parallel to the crankshaft, similar to how gears align in a transmission.

  • MGU-K rotating parts must maintain a permanent mechanical link to the ICE crankshaft
  • The connection must operate at a fixed speed ratio (not variable)
  • The MGU-K drive axis must be parallel to the crankshaft axis for proper alignment
  • These requirements apply during normal operating conditions throughout the race
Official FIA Text

Under normal operating conditions all MGU-K rotating parts must be permanently mechanically linked to the ICE with a fixed speed ratio to the crankshaft. The MGU-K and its drive axis must be parallel to the crankshaft axis.

mgu-kmotor generator unit kineticcrankshaft linkfixed speed ratiomechanical connection
2026 Season Regulations

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