- shell bearing
- shooting-truck
- side dumper
- side gear
- side pipe
- side shaft
- shopping car
- short block
- shoulder
- side airbag
- side member
- side mirror
- side shift
- side support
- sidewall
- single-axle
- single-motored
- silencer shell
- silicon
- skeleton construction
- slanter engine
- slide carburetor
- slip ring
- sludge
- skid mark
- skid plate
- skidpad
- skin
- skip lorry
- skip truck
- skirt
- slave cylinder
- sliding contacts
- snatch
- socket
- socket spanner
- sleeve
- sloping headlamp
- slot
- slow combustion
- slurry tanker
- smoke
- smoke flare
- smoky exhaust
- sluggish acceleration
- smooth tyre
- snow tire
- snow tyre
- snubber
- socket driver
- solar collector
- soldering iron
- solenoid
- solenoid valve
- solid injection
- solid paint
- solid propellant
- solid tire
- solid tyre
- solidify
- soluble anode
- sonic nozzle
- SLA suspension
- sled
- sleeve bearing
- sleeve valve
- slide hammer
- sliding block
- sliding sleeve
- sliding weight
- slow charging
- slow speed
- small end
- snow chains
- solar generator
- solder
- spacer
- spalling
- spare
- spare can
- spare wheel
- spark map
- spark timing
- spark-breakaway
- special body
- speed nut
- speed symbol
- spent gas
- space frame
- space requirements
- space wagon
- spares car
- spark current
- spark head
- spark plug
- spark retard
- sparking plug
- spatter
- spec
- special lorry