Mountings & Bushings: The Strong, Silent Types of Your Suspension System
Your car is a complex network of moving parts – and those parts need to be held firmly in place while still allowing just enough flexibility to absorb vibration, noise, and movement. That’s where mountings and bushings come in.
These rubber-and-metal heroes may not get much attention, but they play a critical role in keeping your vehicle stable, comfortable, and road-ready.
“It’s not always the loudest parts that keep your car together – it’s the quiet ones doing the heavy lifting.”
What Are Mountings and Bushings?
In simple terms, mountings and bushings are components designed to secure key parts of your vehicle while absorbing vibrations and allowing limited movement. Without them, your ride would be noisy, unstable, and full of metal-on-metal contact – bad news for both comfort and safety.
Let’s explore some of the most important ones:
1. Engine Mountings
These secure your engine to the chassis while absorbing vibrations and torque. If your engine feels like it’s dancing under the hood – or if you hear loud clunking during acceleration – you might have a worn-out mounting.
Why they matter:
- Reduces engine noise and vibration
- Prevents engine movement during driving
- Keeps other systems (exhaust, cooling, transmission) aligned
2. Centre Bearings
Found in vehicles with a two-piece driveshaft, centre bearings support the shaft and absorb movement between the transmission and differential.
Why they matter:
- Smooths out rotational vibration
- Supports the driveshaft during power delivery
- Reduces noise and wear on the drivetrain
3. Control Arm Bushes
These sit between the control arm and the car’s frame. They help absorb road impact and allow smooth up-and-down movement of the suspension.
Signs of wear:
- Clunking when going over bumps
- Uneven tyre wear
- Steering instability
4. Axle Beam Bush
Often found in rear suspension setups, this bush connects the axle beam to the chassis and provides flexibility during cornering and braking.
Why they matter:
- Helps maintain rear wheel alignment
- Reduces vibration and harshness
- Improves stability and ride comfort
5. Exhaust Hanger (Rubber Mounting)
These rubber mounts hold the exhaust system in place, reducing noise and preventing the exhaust from bouncing or dragging on the ground.
Signs of failure:
- Rattling noises under the car
- Exhaust pipe sagging
- Loud vibrations at idle
6. Shackle Bush
Found in leaf spring setups, typically on bakkies and 4X4s, shackle bushes allow the suspension to flex properly when going over uneven terrain.
Why they matter:
- Maintain correct alignment of the rear axle
- Allow proper suspension articulation
- Reduce metal fatigue in the springs
7. Shock Absorber Bush
These sit at the mounting points of your shock absorbers and absorb minor road vibrations while keeping the shocks firmly in place.
Symptoms of wear:
- Excessive suspension noise
- Poor ride comfort
- Loose or knocking shocks
8. Stabiliser Bar Bush (Sway Bar Bush)
These mount the stabiliser bar to the frame, helping to control body roll during cornering.
Why they matter:
- Improve handling
- Reduce sway during turns
- Enhance vehicle stability
9. Strut Mountings
These attach the strut to the vehicle body and often include a bearing for steering movement in front struts.
Signs of wear:
- Popping or clunking sounds during turns
- Uneven steering response
- Excessive road noise
Why You Should Care About Mountings and Bushings
While small and often hidden, these components:
- Improve comfort by reducing noise and vibration
- Protect larger components from excess movement and wear
- Maintain proper alignment and handling
- Prevent long-term damage to suspension and engine parts
Tip: Mountings and bushes degrade slowly over time, so their wear is easy to miss. Regular inspections (especially every 50 000–80 000 km) are essential.
Fun Fact:
Many high-performance vehicles use polyurethane bushings instead of rubber. They last longer and improve handling—but they also make the ride a bit stiffer. It’s all about the trade-off.
Quote to Remember:
“Mountings and bushings don’t just hold it together—they make sure it all works in harmony.”
Mountings and bushings are the quiet professionals of your vehicle’s suspension and drivetrain. They absorb, isolate, and align—making your drive smoother, quieter, and more controlled. Don’t let their size fool you; a worn-out bushing can throw your entire suspension system off balance. Inspect them regularly, replace them when needed, and your car will reward you with years of reliable, rattle-free driving.