Renault Braking System Fault: (100% Guaranteed Fix!)


Renault Braking System Fault

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When your Renault starts showing signs of a braking system fault, it can be quite disconcerting.

Renault Braking System Fault Could be due to low brake fluid level or worn-out brake pads and discs. Leaking in the brake hose or caliper can also lead to such faults. Similarly, faulty components like the brake sensor, ABS module, brake master cylinder or brake booster are other potential causes for a Renault Braking System Fault.

The best way to deal with these issues is by identifying them early on and addressing them promptly – whether that means topping up your brake fluid levels or replacing any faulty parts as necessary.

We’ll delve more into these causes and how you can tackle them effectively in this comprehensive guide.

Renault Braking System Fault Cause & Solutions:

Renault Braking System Fault

1. Low Brake Fluid Level:

Renault Braking System Fault

One common cause for a Renault Braking System Fault is a low brake fluid level. This critical component in the braking system requires monitoring and maintenance to ensure optimal performance.

Possible Indications:

Common Causes:

  • Leak in the brake lines or system components
  • Worn out brake pads which demand more fluid to operate effectively

These issues can gradually decrease your car’s brake fluid level, leading to potential faults in your Renault’s braking system.

Diagnostic Steps:

  1. Visual Inspection: Check the transparent reservoir of the master cylinder, normally located under your car hood near the back of engine bay.
  2. Brake Pedal Test: Press down on your car’s brake pedal when stationary. If it feels spongy or sinks all way down, this could indicate low levels.
  3. Professional Testing: If unsure, consult with a professional mechanic who has tools like pressure testers that can accurately diagnose if you have low levels.

Taking these steps will help identify whether you’re facing a problem due to low brake fluid level.


  • Regularly check and top up your vehicle’s brakes’ hydraulic fluid as part of routine maintenance.
  • Replace worn-out parts causing leaks such as rubber seals & hoses.
  • In case of persistent leakage problems even after replacement, consider inspecting other areas like calipers and wheel cylinders for possible issues.

Always remember: Maintaining appropriate levels ensures safe functioning of brakes reducing chances for potential mishaps!

2. Worn Brake Pads or Discs:

Renault Braking System Fault

Brake pads and discs are critical components of your Renault’s braking system. Over time, these parts can wear down, leading to a potential fault in the braking system. Here’s what you need to know:

  • Signs of Wear: Look out for excessive brake dust on your wheels, squeaking noises when braking, or less responsive brakes.

Why Does This Happen?

  1. Friction: Every time you apply the brakes in your car, friction is created between the brake pads and discs. This gradually wears them down.
  2. Heavy Usage: Habitual hard braking increases the rate at which these components wear out.

Potential Risks:

Excessive brake dust on wheelsInspect and replace brake pads if necessary
Squealing noise when brakingCheck disc for damage and replace if needed

Note: It’s crucial to regularly service your vehicle and check the health of its components including brake pads/discs.

3. Leaking Brake Hose or Caliper:

A leaking brake hose or caliper is another common cause of a Renault braking system fault. It’s crucial to address this issue promptly as it directly affects the efficiency and safety of your brakes.

Brake Hose Leakage :

  • The brake hoses are responsible for transporting the brake fluid from the master cylinder to the rest of the braking system. If there’s a leak in these hoses, you’ll notice:
  • A decrease in brake performance
  • Puddles of brake fluid under your vehicle
  • Soft or spongy feeling when pressing down on the brakes

Caliper Leakage :

  • Brake calipers apply pressure to your car’s brake pads, allowing them to make contact with and slow down your wheels. When they start leaking, symptoms include:
  • Reduced stopping power
  • Fluid leakage visible around tire area
  • Burning smell while driving

In both cases, immediate action should be taken by having a professional mechanic inspect and repair any leaks. Don’t ignore these signs because they can lead to more serious problems like total failure of your Renault’s braking system.

4. Faulty Brake Sensor:

A faulty brake sensor in your Renault can trigger a Braking System Fault. It’s one of the key components that ensures optimal brake performance.

Here are some signs indicating your brake sensor might be at fault:

  • Constantly lit ABS light on dashboard.
  • Reduced braking efficiency.
  • Unusual sounds when braking.

Causes for a Faulty Brake Sensor:

There could be several reasons why the brake sensor goes faulty. Here are few common ones:

  1. Wear and Tear: Over time, due to constant usage, sensors wear out.
  2. Dirt or Debris: Accumulation of dirt or debris can affect its functioning.
  3. Damaged Wiring: If wires connected to the sensor get damaged, it could lead to faults.
Wear and TearReplace with new sensor
Dirt or DebrisClean and check regularly
Damaged WiringRepair or replace wiring

Having these issues checked by a professional mechanic is crucial for the safe operation of your vehicle’s braking system. Remember – safety first!

5. Faulty ABS Module:

The Anti-lock Braking System (ABS) module is a critical component of your Renault’s braking system. It ensures that the wheels don’t lock up during sudden braking, preventing skidding and offering better control.

When the ABS module becomes faulty, it can lead to a ‘Braking System Fault’ warning light on your dashboard.

Here are some symptoms and potential fixes:


  • Unresponsive brake pedal: If you notice reduced response or unusual stiffness in the brake pedal, this could indicate an issue with the ABS module.
  • ABS Light illuminated: The most apparent symptom is when the ABS light turns on. This serves as a direct indication of an issue within the anti-lock braking system.
  • Longer stopping distance: A failing ABS may result in longer distances required to bring your vehicle to a stop.

Potential Fixes:

  1. Module Replacement: In many cases, replacing the faulty ABS module will resolve any related issues.
  2. Electrical Repairs: Sometimes, electrical faults like wiring problems or sensor malfunctions can cause problems with your vehicle’s ABS unit.
SymptomPotential Fix
Unresponsive Brake PedalModule Replacement
Illuminated ABS LightElectrical Repairs
Longer Stopping DistanceModule Replacement

Remember: Always consult with a professional mechanic if you experience any of these symptoms for proper diagnosis and repair!

6. Faulty Brake Master Cylinder:

When it comes to the braking system of a Renault, one potential issue could be with the brake master cylinder. This component is crucial for delivering brake fluid under pressure from your foot to the rest of the braking system.

Here are some common signs that might indicate a faulty brake master cylinder:

  • Spongy or unresponsive brakes: If your car’s brakes feel spongy when you press down on them, or they fail to slow down your vehicle efficiently, this is often an indication of problems with the brake master cylinder.
  • Fluid leaks: Brake fluid leaks around the pedal area are usually indicative of a compromised master cylinder.
  • Warning lights: A warning light on your dashboard related to braking systems can also signal issues with this component.

To confirm if these symptoms are due to a faulty brake master cylinder, consider performing these checks:

  1. Check for external leaks: Inspect areas near where you park regularly for any signs of leaked fluids.
  2. Pedal test: Press and hold down on the pedal while engine is off; if it sinks slowly towards floor, there may be an internal leak in master cylinder.
  3. Inspection by professionals: For accurate diagnosis and repairs, consider taking your Renault to certified mechanics.
Sign/SymptomPossible Indication
Spongy BrakesFaulty Brake Master Cylinder
Fluid LeaksFaulty Brake Master Cylinder
Warning LightsProblems in Braking System

Remember that maintaining regular service schedules helps prevent such failures and ensures safer drives!

7. Faulty Brake Booster:

A faulty brake booster can compromise your Renault’s braking system. It’s crucial to understand the signs and possible remedies.

Signs of a Faulty Brake Booster:

  • Hard or high brake pedal: This is when you need excessive force to press down on the brake.
  • Less stopping power: Even after applying brakes, your car doesn’t slow down as it should.
  • Hissing sounds: This usually happens when there’s an air leak in the booster.

Reasons for Failure:

Brake boosters fail due to several reasons:

  1. Wear and Tear: Over time, components within the booster may wear out.
  2. Leakage: A vacuum leak in any part of the system might lead to failure.
  3. Faulty Check Valve: If this valve gets stuck or clogged, it could cause issues with your brake booster.

Troubleshooting Steps:

If you suspect a problem:

  • First check if there are external damages or leaks in vacuum hoses connected to the booster.
  • Test drive at low speed while paying attention to how quickly your vehicle stops when brakes are applied.

Remember, safety always comes first! For best results, have a professional mechanic inspect and repair any faults related to your braking system.

Fix this issue by following this video:

Conclusion and final thoughts 💭

Any Renault braking system fault is a serious concern that needs immediate attention. The causes vary from low brake fluid levels to worn-out brake pads or discs, and even leaking hoses or calipers.

Some faults may also be due to defective parts such as sensors, the ABS module, the master cylinder, or the booster.

Act promptly by seeking professional help when these symptoms surface. Regular maintenance checks are key in preventing these problems from escalating into major ones.

Remember, your vehicle’s safety depends on an effective braking system.

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