Monocoque (Unibody)
A monocoque or unibody is a body design in which the body shell itself is the load-bearing structure, without a separate frame.
What is Monocoque (Unibody)?
Almost all modern passenger cars and most SUVs use this design. It is lighter and stiffer than a separate frame and allows better crash design. Floor, pillars, roof and sills together form the structure. Modern unibodies use high-strength and ultra-high-strength steels, aluminium and adhesives. Some parts cannot be heated or straightened during repair, which is why body shops follow manufacturer repair manuals.
How it works
Loads from suspension and engine are spread through the welded and bonded panels of the body.
Why it matters for your car
Rust in sills or structural areas weakens the whole car and is taken seriously at inspections. Structural repairs require manufacturer methods and are not simple patching.
Other terms
- Alternator Pulley (Overrunning Pulley)
- Car Sharing
- Convertible Roof (Soft Top Or Folding Hard Top)
- Dielectric Grease
- Electronic Parking Brake
- Engine Displacement (Engine Capacity)
- Frunk (Front Trunk)
- Historic Vehicle Registration (Classic Plates)
- Kit Car
- Night Vision Assist
- Orifice Tube
- Pending Code
- Reverse Gear
- Seat Adjustment
- Sensor Ground (Signal Ground)
- Sequential Turbocharging
- Shock Absorber
- Toll Vignette
- Waterless Wash
- Wheel Brace And Jack (Car Tool Kit)