Sedi - Shac
- Sediment trap
- Seizing
- Selector fork
- Selector mechanism
- Selector rod
- Self-adjusting tappet
- Self-aligning roller bearing
- Self-aligning torque
- Self-cleaning
- Self-energizing brake
- Self-ignition
- Self-levelling suspension
- Self-locking
- Self-lubricating
- Self-parking wiper
- Self-sealing tyre
- Semi-automatic
- Semi-automatic transmission
- Semi-axle shaft
