When and Why You Should Change Brake Fluid (And What Happens If You Don’t)
Brake fluid is the unsung hero of your car’s braking system. Without it, your brakes wouldn’t work at all. However, like any other fluid in your car, brake fluid doesn’t last forever—it degrades over time and needs to be replaced. In this post, we’ll explain when and why you should change your brake fluid, the risks of neglecting it, and a brief overview of how the process works.
What Does Brake Fluid Do?
Brake fluid is a hydraulic fluid that transfers the pressure from your foot on the brake pedal to the brake components at each wheel, helping to stop the car. It’s essential for:
- Generating consistent braking power.
- Preventing overheating of brake components.
- Maintaining the responsiveness of your brakes.
However, brake fluid is hygroscopic, meaning it absorbs moisture over time. This contamination reduces its effectiveness and can lead to brake failure if not addressed.
When Should You Change Brake Fluid?
In the UK, most manufacturers recommend changing brake fluid every 2 to 3 years or as specified in your car’s service schedule. Factors that can influence this interval include:
- Driving Conditions: Frequent braking in city traffic or driving in wet weather can accelerate brake fluid degradation.
- Vehicle Type: Performance vehicles may require more frequent changes due to higher braking demands.
- MOT and Servicing: Regular MOT and service checks will often highlight whether your brake fluid is due for replacement.
Why You Should Change Brake Fluid
Old, contaminated brake fluid can compromise the safety and performance of your car. Here’s why timely replacement is essential:
- Prevents Brake Fade: Moisture-contaminated brake fluid has a lower boiling point, causing reduced braking efficiency when the brakes heat up.
- Avoids Corrosion: Old fluid can cause rust and corrosion inside your brake system, leading to expensive repairs.
- Maintains Responsiveness: Fresh brake fluid ensures smooth and consistent braking performance.
Risks of Neglecting Brake Fluid Replacement
Failing to replace your brake fluid can lead to serious safety and performance issues, including:
- Brake Failure: Over time, moisture in the fluid can cause vapour lock, where air bubbles form and prevent hydraulic pressure from building.
- Increased Repair Costs: Corroded brake components, such as calipers, lines, or the master cylinder, can be expensive to fix.
- Failed MOT: Brake fluid issues could lead to your vehicle failing its MOT in the UK.
How Is Brake Fluid Replaced? A Quick Overview
Replacing brake fluid is a delicate process that requires care to ensure the entire system functions correctly. Here’s a brief summary:
- Inspection: A mechanic checks the current brake fluid for contamination, colour, and level.
- Flushing the Old Fluid: The old fluid is drained from the system.
- Bleeding the Brakes: Fresh brake fluid is added while air bubbles are removed from the brake lines, ensuring no air remains in the system.
- System Testing: The brakes are tested to ensure they’re responsive and the fluid levels are correct.
While some experienced DIYers can attempt this process, it’s best to leave it to a professional to avoid introducing air or contamination into the brake lines.
Don’t Risk It – Get Your Brake Fluid Checked Today!
If it’s been more than 2 years since your last brake fluid change, or if you’re unsure of its condition, don’t wait! At The Dalby Group, we offer professional brake fluid replacement services to keep you safe and your car performing at its best.
- 📞 Call or WhatsApp 01903 372937 to book your brake fluid service.
- 📍 We’re mobile! If you live in Sussex, Surrey, or Hampshire, we can come to your home or work to test or change your brake fluid.
- 🌐Head to www.thedalbygroup.co.uk/repair-services and get in touch to book your appointment.
Your safety matters to us—keep your braking performance in top condition with fresh brake fluid. Contact us today!
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