Bulkhead (Firewall)
The bulkhead is the metal wall between the engine bay and the cabin that blocks heat, noise and fumes.
What is Bulkhead (Firewall)?
Wiring and pipes pass through it via sealed grommets. The pedal box and brake booster are mounted on it. It is part of the body’s crash structure. Extra sound insulation on the bulkhead is a common way to reduce engine noise in the cabin.
How it works
A stamped steel panel with insulation separates the engine bay from the cabin.
Why it matters for your car
Missing grommets let water and fumes into the cabin. Drill holes only where the manufacturer allows.
Other terms
- Active Aerodynamics
- Aftermarket Parts
- Air Suspension
- Anti-roll Bar
- Battery Registration (Battery Coding)
- Battery Tester
- Control Unit Reprogramming (Flashing)
- Coolant Hose (Radiator Hose)
- Door Hinge
- DPF Regeneration
- Freeze Frame Data
- Headlight Restoration
- Horn
- Open Differential
- Side Impact Crash Test
- Steering Play (Free Play)
- Turbocharger
- Viscous Coupling
- Wheel Cylinder
- ZDDP (Zinc Anti-Wear Additive)