Artigo atualizado em 31 de July de 2026 por João Daniel
The braking system and suspension are two of the most important components for a car’s safety and comfort. Preventive maintenance avoids accidents, increases the lifespan of parts, and improves vehicle handling.
3.1 Braking System
Main components
- Discs and pads: Located in the wheels, they are responsible for braking the car.
- Clamps and cylinders: They ensure that the force from the pedal is transmitted to the discs.
- Brake fluid: transmits hydraulic pressure.
Common problems with the C4
- Metallic noises when braking (worn brake pads).
- Low or spongy pedal (old fluid or air in the system).
- Warning light on the dashboard indicating ABS failure.
Technical tips
- Brake pad replacement: usually every 30,000 to 40,000 km.
- Discs: Check for wear every 50,000 km; if there are deep grooves, replace.
- Brake fluid: Replace every 2 years or 30,000 km, always use DOT 4 approved tires.
- ABS and sensors: Perform regular maintenance; a dirty or faulty sensor can trigger a warning light.
Average lifespan
| Component | Approximate lifespan | Observation |
|---|---|---|
| Front brake pads | 30,000 km | It depends on the driving style. |
| Rear brake pads | 40,000 km | They generally last longer than the front ones. |
| Discs | 50,000 km | Replace if there are scratches or warping. |
| Brake fluid | 2 years / 30,000 km | It maintains pressure and prevents corrosion. |
3.2 Suspension System
Main components
- Shock absorbers: They absorb impacts and keep the wheels in contact with the ground.
- Springs: They support the weight of the car and provide comfort.
- Bushings and tie rods: They connect arms and stabilizers, allowing for controlled movement.
Common problems
- Loud, thumping noises when going over speed bumps or potholes.
- Heavy or misaligned steering.
- Uneven tire wear.
Technical tips
- Shock absorbers: Change every 60,000 km or when there is an oil leak.
- Bushings and tie rods: Check every 40,000 km; noises indicate wear.
- Alignment and balancing: Perform every 10,000 km or after changing tires/shock absorbers.
- Tires: Uneven wear may indicate a problem with the suspension; always check before replacing.
Average lifespan
| Component | Approximate lifespan | Observation |
|---|---|---|
| Shock absorbers | 60,000 km | Depending on urban or highway use. |
| Springs | 100,000 km | They generally last longer than shock absorbers. |
| Bushings and tie rods | 40,000 km | Check for noises and looseness regularly. |
| Tires | 50,000 km | Alignment directly influences |
Preventive Care
- Avoid potholes at high speed: protects suspension and shock absorbers.
- Don’t overload the car: excess weight wears out the springs and shock absorbers.
- Have your car regularly serviced at Citroën-specialized workshops; original parts increase durability.
Chapter Summary:
- The braking system ensures safety; the suspension ensures comfort and stability.
- Preventive maintenance and paying attention to your car’s warning signs can prevent high costs and accidents.
- Tables and checklists help to control replacement and wear schedules for components.
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